y0790 SPEED TEC EXPERT Zenoah G230 tuning engine
Product information "y0790 SPEED TEC EXPERT Zenoah G230 tuning engine"
The SPEED TEC EXPERT genuine Zenoah G230 engine is optimized for performance with sophisticated craftsmanship and guarantees, besides greatly increased performance, excellent workmanship and stamina.
SPEED TEC EXPERT version modifications:
Cylinder:
Adjustment of compression; enlarged ports, fuel management milled, modified exhaust and intake.
Piston:
weight reduced; skirt shortened; oil rings, piston above and below piston ring tapered and piston dome ground.
Crankshaft:
is adjusted and aligned.
Flywheel:
weight reduced and checked for runout.
Gaskets:
use of premium quality gaskets.
To achieve the optimum performance gain of a SPEED TEC EXPERT engine, we recommend the use of a tuned pipe ( to the tuned pipes ).
SPEED TEC EXPERT version modifications:
Cylinder:
Adjustment of compression; enlarged ports, fuel management milled, modified exhaust and intake.
Piston:
weight reduced; skirt shortened; oil rings, piston above and below piston ring tapered and piston dome ground.
Crankshaft:
is adjusted and aligned.
Flywheel:
weight reduced and checked for runout.
Gaskets:
use of premium quality gaskets.
To achieve the optimum performance gain of a SPEED TEC EXPERT engine, we recommend the use of a tuned pipe ( to the tuned pipes ).
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Accessories / Spare parts
To ensure the required cooling for current 1/5 and 1/6 engines the flywheels have fins on both sides. Therefore the fan housing has large openings on the crankcase side for the required air supply. However, the risk of foreign objects (grass, sand, or even stones!) entering here Is very high! As a result, broken fins on the flywheel occur frequently. This leads to reduced cooling efficiency and - even more critical vibrations from a flywheel which is out of balance due to missing fins. Therefore, this kind of flywheel protection is highly recommended, especially for offroad use. The product video explains the handling in detail! Note:It is essential to thoroughly clean and degrease the crankcase prior to attaching the hook-and-loop tape (OKS2661)!For installation on Chung-Yang and Zenoah engines in FG cars, the crankcase cover must be slightly modified in two places where the engine mount is attached (see Figure 6 and 7). Furthermore the fit of the fabric must be as tight as possible in the region of the layshaft pinion (in front of the differential ring gear!) (see Figure 8).Set includes:Special tailored fabric with sewed on hook-and-loop tapehook-and-loop tape for installation to the crankcaseAdhesive for securing the hook-and-loop tape
Genuine HT spare/option part. New billet version, CNC-machined!Fits Zenoah G230/240/260/270/290/320, Losi, HPI Fuelie and CY engines. Not as easily damaged as the stock plastic unit.Does not fit PT (Carson/Smartech) engines!Contents:1 piece
Genuine HT spare/option part. Special fabric bag to protect engines, rc-plates or other expensive items. Large opening and pull-string closure.Size:Diameter 200 mmHeight 200 mmContents:1 pieceAccessories not included.
Fully synthetic oil, available in three blends. 1-liter bottle.The optimal 2-stroke oil for 23-30 cm³ engines/cars Motul Racing Oil is available in three different blends: On-Road for high revving onroad cars Off-Road for cars with high torque enginesMixing ratio for 1/5 & 1/6 applications: We recommend a mix with about 4% oil, which means 200 cc of oil to 5 litres of gas (1:25 ratio). With one litre of Motul oil you can mix about 25 litres of optimal fuel for your 1/5 or 1/6 car. That's enough for well over 20 hours of driving fun! Oil / Gas Oil percent Oil per 1 liter of gasoline Oil per 2 liter of gasoline Oil per 3 liter of gasoline Oil per 4 liter of gasoline Oil per 5 liter of gasoline 1:20 5% 50 ml 100 ml 150 ml 200 ml 250 ml 1:25 4% 40 ml 80 ml 120 ml 160 ml 200 ml 1:30 3,33% 33 ml 67 ml 100 ml 134 ml 167 ml 1:33 3% 30 ml 60 ml 90 ml 120 ml 150 ml 1:35 2,86% 29 ml 58 ml 86 ml 115 ml 143 ml 1:40 2,5% 25 ml 50 ml 75 ml 100 ml 125 ml 1:50 2% 20 ml 40 ml 60 ml 80 ml 100 ml
Genuine Champion spare/option part.OEM spark plug for Zenoah G230/240/260/270/290/320.Ideal too for PT, Chung Yang, Losi, HPI-Fuelie, Smartech, Nutech and Carson and other engines.The most widely used, qualitatively best spark plug for the model sport! Especially by the most 1/6 scale models the short ceramic body is indispensable, because otherwise on grounds of the heightened mounting position- the spark plug would protrude beyond the roll cage and therefore is extremely fragile by flashovers.Contents:3 pieces
Genuine HT spare/option part. Helpful tool for removal of clutch shoes, flywheels and many more.FitsZenoah G230/G240/G260/G270/G290/G320Chung-Yang enginesPT enginesLosi enginesHPI enginesThreadsize:M10 x 1Contents:1 piece
Genuine HT spare/option part. Especially for CY / Zenoah G230/240/260/270/290/320, HPI and Losi engines.Can be used for removal of the standard clutch as well!Contents:1 piece
Marston Universal blue is the leading non-setting gasket and sealing compound in use world-wide. The product is used by many of the world?s major automotive manufacturers and by several Formula 1 teams.Features- Non hardening and non setting- Unlimited assembly time- Vibration resistant- Allows metal to metal contact- Resistant to combustion products, water, engine coolant, petroleum, lubricating oils, kerosene and fluorocarbon refrigerants- Seals surface imperfections- Withstands rapid variations in temperature80 ml tube
Content: 80 Milliliter (€123.75* / 1000 Milliliter)
Especially for installation of all engine gaskets. Temperature resistant from -55 °C to +200 °C. Resistant to water, mineral oils, synthetic lubricants, fuels, organic solvents and refrigerants. info: Hand tight: 10 - 20 minReady to use: 1 - 3 hoursGap fill: 0.5 mmContent: 50 ml Notes for usage: This surface seal is not for use as the sole sealant, it should always be applied in combination with a paper gasket.The HT-surface sealing agent should be sparsely applied over the entire surface, with care being taken that the sealant does not enter the devices internals (e.g. crankcase, differential a.s.o.) during the assembly.
Content: 50 Milliliter (€538.00* / 1000 Milliliter)
Genuine HT spare/option part. After-Run is a performance enhancing preservation, which ensures that the engine starts properly, even after a long time (winter break) storage. Added to the fuel it keeps the fuel system clean.Among other After-Run conserves the diaphragm of the Walbro carburetor!For long term storage (i.e. during winter!) "vital" for the carburetor diaphragms!For 23 to 32 cm³ engines like Zenoah, Chung Yang, PT, Losi, HPI a.s.o.It binds water in the fuel, particularly important when the engine is not run regularly or after wet races. After-Run improves engine performance, ensures better combustion, removes debris and residues. Simply add the content of the bottle to 5 litres of fuel.Contents:1 piece / 20 ml
Content: 20 Milliliter (€395.00* / 1000 Milliliter)
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The SPEED TEC EXPERT genuine Zenoah G240 engine is optimized for performance with sophisticated craftsmanship and guarantees, besides greatly increased performance, excellent workmanship and stamina. SPEED TEC EXPERT version modifications: Cylinder: Adjustment of compression; enlarged ports, machined and polished exhaust and intake. Piston: weight reduced; skirt shortened; oil rings, piston above and below piston ring tapered and piston dome ground. Crankshaft: is adjusted and aligned. Flywheel: weight reduced and checked for runout. Gaskets: use of premium quality gaskets.To achieve the optimum performance gain of a SPEED TEC EXPERT engine, we recommend the use of a tuned pipe ( to the tuned pipes ).
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Genuine HT spare/option part. Special fabric bag to protect engines, rc-plates or other expensive items. Large opening and pull-string closure.Size:Diameter 200 mmHeight 200 mmContents:1 pieceAccessories not included.
The SPEED TEC CRANK genuine Zenoah engine is optimized for performance by hand with sophisticated craftsmanship and guarantees, besides greatly increased performance, excellent workmanship and stamina. SPEED TEC Team Edition version modifications: Cylinder & case:Adjustment of compression; enlarged ports, fuel management milled, machined and polished exhaust, intake is flow-optimized the case is specially matched with enlarged and flow-optimized cross section towards the ports Crankshaft:is adjusted, aligned and balancedFlywheel and ignition:Latest SPEED TEC CRANK SV ignition system for rc-car race engines with air baffles, a special balanced 62 mm diameter flywheel, modified ignition coil mount and special ignition system allows for the extremely fast revving of the SPEED TEC team edition engine and guarantees a significantly improved performance.The machined and more than 30% lighter than stock CRANK flywheel with fins on both sides contributes to the optimized engine cooling.Gaskets:Premium quality gaskets installed.Isolator:Special matched and raised insulator Attention! We recommend to run exclusively fully synthetic 2-stroke engine oil, like y0813 Motul 800 racing oil.
The SPEED TEC CRANK genuine Zenoah engine is optimized for performance by hand with sophisticated craftsmanship and guarantees, besides greatly increased performance, excellent workmanship and stamina. SPEED TEC Team Edition version modifications: Cylinder & case:Adjustment of compression; enlarged ports, fuel management milled, machined and polished exhaust, the intake is flow-optimized. the case is specially matched with enlarged and flow-optimized cross section towards the ports Cylinder modified for installation of the ignition systemPiston:Transfer port area optimized for flow, weight reduced and the piston-roof is flow-optimized and polishedCrankshaft:is adjusted, aligned and balancedFlywheel and ignition:Latest SPEED TEC CRANK SV ignition system for rc-car race engines with air baffles, a special balanced 62 mm diameter flywheel, modified ignition coil mount and special ignition system allows for the extremely fast revving of the SPEED TEC team edition engine and guarantees a significantly improved performance.The machined and more than 30% lighter than stock CRANK flywheel with fins on both sides contributes to the optimized engine cooling.Gaskets:Premium quality gaskets installed. Cylinder gasket installed using elastic gasket sealer.Isolator:Special matched and raised insulator Attention! We recommend to run exclusively fully synthetic 2-stroke engine oil, like y0813 Motul 800 racing oil.
Genuine Speed Tec spare/option part. Contents:1 piece
The SPEED TEC CRANK genuine Zenoah engine is optimized for performance by hand with sophisticated craftsmanship and guarantees, besides greatly increased performance, excellent workmanship and stamina. SPEED TEC Team Edition version modifications: Cylinder & case:Adjustment of compression; enlarged ports, fuel management milled, machined and polished exhaust, the intake is flow-optimized the case is specially matched with enlarged and flow-optimized cross section towards the ports Cylinder modified for installation of the ignition systemPiston:Transfer port area optimized for flow, weight reduced and the piston-roof is flow-optimized and polishedCrankshaft:is adjusted, aligned and balancedFlywheel and ignition:Latest SPEED TEC CRANK SV ignition system for rc-car race engines with air baffles, a special balanced 62 mm diameter flywheel, modified ignition coil mount and special ignition system allows for the extremely fast revving of the SPEED TEC team edition engine and guarantees a significantly improved performance.The machined and more than 30% lighter than stock CRANK flywheel with fins on both sides contributes to the optimized engine cooling.Gaskets:Premium quality gaskets installed. Cylinder gasket installed using elastic gasket sealer.Isolator:Special matched and raised insulator Attention! We recommend to run exclusively fully synthetic 2-stroke engine oil, like y0813 Motul 800 racing oil.
The SPEED TEC CRANK genuine Zenoah engine is optimized for performance by hand with sophisticated craftsmanship and guarantees, besides greatly increased performance, excellent workmanship and stamina. SPEED TEC Team Edition version modifications: Cylinder & case:Adjustment of compression; enlarged ports, fuel management milled, machined and polished exhaust, the intake is flow-optimized the case is specially matched with enlarged and flow-optimized cross section towards the ports Piston:Transfer port area optimized for flow, weight reduced and the piston-roof is flow-optimized and polishedCrankshaft:is adjusted, aligned and balancedFlywheel and ignition:Latest SPEED TEC CRANK SV ignition system for rc-car race engines with air baffles, a special balanced 62 mm diameter flywheel, modified ignition coil mount and special ignition system allows for the extremely fast revving of the SPEED TEC team edition engine and guarantees a significantly improved performance.The machined and more than 30% lighter than stock CRANK flywheel with fins on both sides contributes to the optimized engine cooling.Gaskets:Premium quality gaskets installed. Cylinder gasket installed using elastic gasket sealer.Isolator:Special matched and raised insulator Attention! We recommend to run exclusively fully synthetic 2-stroke engine oil, like y0813 Motul 800 racing oil.
The SPEED TEC CRANK genuine Zenoah engine is optimized for performance by hand with sophisticated craftsmanship and guarantees, besides greatly increased performance, excellent workmanship and stamina. SPEED TEC Team Edition version modifications: Cylinder & case:Adjustment of compression; enlarged ports, fuel management milled, machined and polished exhaust,the intake is flow-optimized the case is specially matched with enlarged and flow-optimized cross section towards the ports Cylinder modified for installation of the ignition systemPiston:Transfer port area optimized for flow, weight reduced and the piston-roof is flow-optimized and polishedCrankshaft:is adjusted, aligned and balancedFlywheel and ignition:Latest SPEED CRANK SV ignition system for rc-car race engines with air baffles, a special balanced 62 mm diameter flywheel, modified ignition coil mount and special ignition system allows for the extremely fast revving of the SPEED TEC team edition engine and guarantees a significantly improved performance.The machined and more than 30% lighter than stock CRANK flywheel with fins on both sides contributes to the optimized engine cooling.Gaskets:Premium quality gaskets installed. Cylinder gasket installed using elastic gasket sealer.Isolator:Special matched and raised insulator Attention! We recommend to run exclusively fully synthetic 2-stroke engine oil, like y0813 Motul 800 racing oil.
The SPEED TEC EXPERT genuine Zenoah 30,5 cm³ engine is optimized for performance with sophisticated craftsmanship and guarantees, besides greatly increased performance, excellent workmanship and stamina. SPEED TEC EXPERT version modifications: Cylinder: Adjustment of compression; enlarged ports, fuel management milled, machined and polished exhaust and intake. Piston: weight reduced; skirt shortened; oil rings, piston above and below piston ring tapered and piston dome ground. Crankshaft: The Zenoah 30,5 cm³ SPEED TEC Expert comes with the genuine Zenoah +2 mm stroker crank #577953101. It is adjusted, aligned and balanced. Flywheel: weight reduced and checked for runout. Gaskets: use of premium quality gaskets.To achieve the optimum performance gain of a SPEED TEC EXPERT engine, we recommend the use of a tuned pipe ( to the tuned pipes ).
The SPEED TEC EXPERT genuine Zenoah G240 engine is optimized for performance with sophisticated craftsmanship and guarantees, besides greatly increased performance, excellent workmanship and stamina. SPEED TEC EXPERT version modifications: Cylinder: Adjustment of compression; enlarged ports, machined and polished exhaust and intake. Piston: weight reduced; skirt shortened; oil rings, piston above and below piston ring tapered and piston dome ground. Crankshaft: is adjusted and aligned. Flywheel: weight reduced and checked for runout. Gaskets: use of premium quality gaskets.To achieve the optimum performance gain of a SPEED TEC EXPERT engine, we recommend the use of a tuned pipe ( to the tuned pipes ).
The SPEED TEC EXPERT genuine Zenoah G270 engine is optimized for performance with sophisticated craftsmanship and guarantees, besides greatly increased performance, excellent workmanship and stamina. SPEED TEC EXPERT version modifications: Cylinder: Adjustment of compression; enlarged ports, fuel management milled, machined and polished exhaust and intake. Piston: weight reduced; skirt shortened; oil rings, piston above and below piston ring tapered and piston dome ground. Crankshaft: is adjusted and aligned. Flywheel: weight reduced and checked for runout. Gaskets: use of premium quality gaskets.To achieve the optimum performance gain of a SPEED TEC EXPERT engine, we recommend the use of a tuned pipe ( to the tuned pipes ).
The SPEED TEC 7-port genuine Zenoah engine is optimized for performance by hand with sophisticated craftsmanship and guarantees, besides greatly increased performance, excellent workmanship and stamina. More power and torque through the three additional transfer ports.SPEED TEC V 7-port version modifications: Cylinder:Cylinder bottom modified for higher compressionenlarged and flow-optimized transfer portsmachining of three additional transfer ports raises number of ports from 4 to 7intake and exhaust ports optimized and matchedport timing modifiedCrankshaft:is adjusted, aligned and balancedFlywheel and ignition:Weight reduced and checked for run-out.Gaskets:Premium quality gaskets installed. Cylinder gasket installed using elastic gasket sealer.With the new "K & N" version of the Losi DBXL there is another detail, which need to be considered.From the very beginning the hole pattern for the engine installation in the DBXL chassis plate was no precise match to the hole pattern of the engine, even when delivered in stock form with standard engine. Now with the "K&N" version the engine mount has been changed to eliminate this discrepancy. However, all aluminum engine mounts available on the market share their dimensions with the previous plastic engine mount. For the installation of a G320 Zenoah in a "K&N" -DBXL two possible combinations exist in order to obtain the correct hole pattern:When using the standard (new) plastic engine mount a shortened clutch housing is required as in a 5ive-TWhen using an aluminum engine mount a stock length clutch housing is requiredSeparately, it is recommended to enlarge the cutout in the body panel in front of the K & N air filter for about 2 - 3 mm to ensure that the panel cannot chafe on the air filter.For all HPI Baja 5 cars the G320RCer clutch housing has to be shortened at the mounting base, for Losi 5ive- T and Desert Buggy XL cars the clutch housings overall length must be shortened to CY size.When installing the air filter you must pay attention to the length of the screws.For use on Losi and HPI we recommend M5x45 screws (like H94763); you can also cut existing screws to length, of course.When ordering with a modified clutch housing we will include these screws!In our shop you can select from Zenoah G320RC engines already modified to fit your HPI or Losi car.The installation of a Zenoah G320RC in a Smartech C5 onroad car is possible without modifications. However, due to the engines performance aluminum engine mounts (set # y0189) are mandatory!The installation of the Zenoah G320RC in other cars (like FG or Smartech buggies / monsters a.s.o.) is not even remotely straightforward, since the layshaft pinion (the small pinion in front of the big differential spur gear) is in the way for the larger Zenoah G320RC crankcase.Compatibility Zenoah / Losi 5ive-T:Please note that for installation in a Losi 5ive the fan cover must be swapped for a Losi or CY cover #5341 in order to fit the chassis" bolt pattern.If you want to install a Zenoah engine into the Losi 5ive, you usually have to use a fan cover from the CY engine.However, there is a workaround to maintain Zenoah fan cover.The adjustment is done via the pinion specific mounting plates for the engine. The change always affects only the rear, outer (carburetor side) plate under the fan cover. This is rotated by 180°; so that the embossed number on this plate faces the exhaust side of the engine!18T pinion: use 20T plate, rotated 180°19T pinion: use 19T plate, rotated 180°20T pinion: use 18T plate, rotated 180°On the plus side you gain the opportunity to easily mount a Zenoah engine keeping the original fan cover. On the other hand there will be the disadvantage of the necessity to combine two different sets of engine mounting plates when installing any pinion other than the stock 19T version. Therefore we do not recommend this workaround for everyday use. Nevertheless it works perfectly should ever the need arise. Attention! We recommend to run exclusively fully synthetic 2-stroke engine oil, like y0813 Motul 800 racing oil.
The SPEED TEC CRANK genuine Zenoah engine is optimized for performance by hand with sophisticated craftsmanship and guarantees, besides greatly increased performance, excellent workmanship and stamina. SPEED TEC Team Edition version modifications: Cylinder & case:Adjustment of compression; enlarged ports, fuel management milled, machined and polished exhaust, intake is flow-optimized the case is specially matched with enlarged and flow-optimized cross section towards the ports Piston:Transfer port area optimized for flow and polished, weight reducedand the piston-roof is polishedCrankshaft:is adjusted, aligned and balancedFlywheel and ignition:Latest SPEED TEC CRANK SV ignition system for rc-car race engines with air baffles, a special balanced 62 mm diameter flywheel, modified ignition coil mount and special ignition system allows for the extremely fast revving of the SPEED TEC team edition engine and guarantees a significantly improved performance.The machined and more than 30% lighter than stock CRANK flywheel with fins on both sides contributes to the optimized engine cooling.Gaskets:Premium quality gaskets installed. Cylinder gasket installed using elastic gasket sealer.Isolator:Special matched and raised insulator Attention! We recommend to run exclusively fully synthetic 2-stroke engine oil, like y0813 Motul 800 racing oil.
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23 cc Zenoah engine for large scale cars!The engine will be delivered with pull starter, carb and spark plug / spark plug cap. Genuine Zenoah air filter and / or complete clutch and / or ball beard carburetor are optionally available at additional charge.Compatibility Zenoah / Losi 5ive-T:Please note that for installation in a Losi 5ive the fan cover must be swapped for a Losi or CY cover #5341 in order to fit the chassis" bolt pattern.If you want to install a Zenoah engine into the Losi 5ive, you usually have to use a fan cover from the CY engine.However, there is a workaround to maintain Zenoah fan cover.The adjustment is done via the pinion specific mounting plates for the engine. The change always affects only the rear, outer (carburetor side) plate under the fan cover. This is rotated by 180°; so that the embossed number on this plate faces the exhaust side of the engine!18T pinion: use 20T plate, rotated 180°19T pinion: use 19T plate, rotated 180°20T pinion: use 18T plate, rotated 180°On the plus side you gain the opportunity to easily mount a Zenoah engine keeping the original fan cover. On the other hand there will be the disadvantage of the necessity to combine two different sets of engine mounting plates when installing any pinion other than the stock 19T version. Therefore we do not recommend this workaround for everyday use. Nevertheless it works perfectly should ever the need arise. Attention! We recommend to run exclusively fully synthetic 2-stroke engine oil, like y0813 Motul 800 racing oil.
The SPEED TEC CRANK genuine Zenoah engine is optimized for performance by hand with sophisticated craftsmanship and guarantees, besides greatly increased performance, excellent workmanship and stamina. SPEED TEC Team Edition version modifications: Cylinder & case:Adjustment of compression; enlarged ports, fuel management milled, machined and polished exhaust,the intake is flow-optimized the case is specially matched with enlarged and flow-optimized cross section towards the ports Cylinder modified for installation of the ignition systemPiston:Transfer port area optimized for flow, weight reduced and the piston-roof is flow-optimized and polishedCrankshaft:is adjusted, aligned and balancedFlywheel and ignition:Latest SPEED CRANK SV ignition system for rc-car race engines with air baffles, a special balanced 62 mm diameter flywheel, modified ignition coil mount and special ignition system allows for the extremely fast revving of the SPEED TEC team edition engine and guarantees a significantly improved performance.The machined and more than 30% lighter than stock CRANK flywheel with fins on both sides contributes to the optimized engine cooling.Gaskets:Premium quality gaskets installed. Cylinder gasket installed using elastic gasket sealer.Isolator:Special matched and raised insulator Attention! We recommend to run exclusively fully synthetic 2-stroke engine oil, like y0813 Motul 800 racing oil.
The SPEED TEC EXPERT genuine Zenoah 30,5 cm³ engine is optimized for performance with sophisticated craftsmanship and guarantees, besides greatly increased performance, excellent workmanship and stamina. SPEED TEC EXPERT version modifications: Cylinder: Adjustment of compression; enlarged ports, fuel management milled, machined and polished exhaust and intake. Piston: weight reduced; skirt shortened; oil rings, piston above and below piston ring tapered and piston dome ground. Crankshaft: The Zenoah 30,5 cm³ SPEED TEC Expert comes with the genuine Zenoah +2 mm stroker crank #577953101. It is adjusted, aligned and balanced. Flywheel: weight reduced and checked for runout. Gaskets: use of premium quality gaskets.To achieve the optimum performance gain of a SPEED TEC EXPERT engine, we recommend the use of a tuned pipe ( to the tuned pipes ).
Especially for installation of all engine gaskets. Temperature resistant from -55 °C to +200 °C. Resistant to water, mineral oils, synthetic lubricants, fuels, organic solvents and refrigerants. info: Hand tight: 10 - 20 minReady to use: 1 - 3 hoursGap fill: 0.5 mmContent: 50 ml Notes for usage: This surface seal is not for use as the sole sealant, it should always be applied in combination with a paper gasket.The HT-surface sealing agent should be sparsely applied over the entire surface, with care being taken that the sealant does not enter the devices internals (e.g. crankcase, differential a.s.o.) during the assembly.
Content: 50 Milliliter (€538.00* / 1000 Milliliter)
Race ported top end set for Zenoah G320 engine.The SPEED TEC EXPERT genuine Zenoah G320 race ported top end set is optimized for performance with sophisticated craftsmanship and when accurately installed - guarantees, besides greatly increased performance, excellent workmanship and stamina. SPEED TEC EXPERT version modifications: Cylinder: Adjustment of compressionEnlarged portsFuel management milledModified exhaust and intakeTransfer port covers:Glued and ready for use Piston: Weight reducedSkirt shortenedOil ringsPiston above and below piston ring tapered and piston dome groundSet includes the following parts: CylinderPistonPiston ringCylinder foot gasketPiston pinPiston pin clipThrust washer for needle bearingCover for transfer portTo achieve the optimum performance gain of a SPEED TEC EXPERT top end set, we recommend the use of a tuned pipe ().