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Description: Counter Shaft Gear 13*42 pre-pressed aka countershaft reduction gear for GY6 125/150cc 4-stroke engines. These gears original replacement (13/42 teeth) only.NOTE: Already pre-pressed countershaft gear 13*42 on counter shaft. No need for A 12-ton hydraulic compressor. Just pop ..

Description: Counter Shaft Gear 15*52 pre-pressed aka countershaft reduction gear for direct stock replacement of 139QMB 49/50cc 4-stroke shortcase engines.NOTE: Already pre-pressed countershaft gear 15*52 on counter shaft. No need for A 12-ton hydraulic compressor. Just pop out stock counter s..

Description: Counter Shaft Gear 16*40 for VOG 260 BN169MM Engines commonly found in Linhai 250/260/300 Scooters and many other makes and models.Specifications: Include the following Transmission gear set.•    1x Front Counter Shaft Teeth: 16 / Spline L: 20mm / OD: 15mm&..

Description: Base Dowel Pin 10mm x 20mm Set (left-crankcase base lower and upper) support for GY6 205cc-232cc+. Replace standard base dowel pins 10mm x 14mm for 10mm x 20mm (6mm extended length). Needed with big bore kits 6mm spacer, extended cylinder height, over-sized cylinder head 4-valve, a..

Description: Gear Set 14*36 has a 16% increase up gear ratio over the stock gear set (13*40 teeth). Which will provide higher top-end speed without losing power on acceleration. Since the GY6 125/150cc transmission stock gear teeth are 13*40 which = gear ratio 3.076:1 this means the stock gear ..

Description: Gear Set 14*38 has a 11% increase up gear ratio over the stock gear set (13*40 teeth). Which will provide higher top-end speed without losing power on acceleration. Since the GY6 125/150cc transmission stock gear teeth are 13*40 which = gear ratio 3.076:1 this means the stock gear ..

Description: Gear Set 15*42 for Honda Dio\Elite. The final drive ratio is the last bit of gearing between your transmission and the driven wheels. In general, a lower final drive ratio will lead to less torque at the wheels but higher top speed. Meanwhile, a higher ratio will result in the opposite,..

Description: Gear Set 16*36 has a 27% increase up gear ratio over the stock gear set (13*40 teeth). Which will provide higher top-end speed without losing power on acceleration. Since the GY6 125/150cc transmission stock gear teeth are 13*40 which = gear ratio 3.076:1 this means the stock ..

Description: Gear Set 17*36 has a 31% increase up gear ratio over the stock gear set (13*40 teeth). Which will provide higher top-end speed without losing power on acceleration. Since the GY6 125/150cc transmission stock gear teeth are 13*40 which = gear ratio 3.076:1 this means the stock gear ..

Description: Gear Set 17*41 for Honda Dio\Elite. Get the most out of your big bore kit, with increased top speed and a more usable rev range performance. The final drive ratio is the last bit of gearing between your transmission and the driven wheels. In general, a lower final drive ratio will lead ..

Description: Gear Set 18*35 has a 36% increase up gear ratio over the stock gear set (13*40 teeth). Which will provide higher top-end speed without losing power on acceleration. Since the GY6 125/150cc transmission stock gear teeth are 13*40 which = gear ratio 3.076:1 this means the stock gear ..

Description: Transmission Bearing Seal Gasket Set aka rear drive bearing set for 139QMB 49/50cc 4-stroke engines. This bearing set contains all the relevant bearings found within the transmission plus seals and gasket. A complete rear transmission bearing set of 6-pieces, plus 2-pieces sea..

Description: Transmission Bearing Seal Plus Gasket aka rear drive bearing set for GY6 125/150cc 4-stroke transmission case bearing set. The set includes 6 bearings, 2 oil seals and a transmission gasket.NOTE: Transmission cover (Part# 179-9) sold separately.Temperature Modification Ma..

Description: G- Transmission Bearing Set aka rear drive bearing set for 139QMB 49/50cc 4-stroke engines. This bearing set contains all the relevant bearings found within the transmission. A complete rear transmission bearing set of 6-pieces.NOTE: Transmission cover, gasket (Part# 151-58) a..

Description: Naraku Gear Set 14*39 has a 9% increase up gear ratio over the stock gear set (13*40 teeth). Which will provide higher top-end speed without losing power on acceleration. Since the GY6 125/150cc transmission stock gear teeth are 13*40 which = gear ratio 3.076:1 this means the stock..

Description: Naraku Gear Set 15*37 has a 20% increase up gear ratio over the stock gear set (13*40 teeth). Which will provide higher top-end speed without losing power on acceleration. Since the GY6 125/150cc transmission stock gear teeth are 13*40 which = gear ratio 3.076:1 this means the stoc..

Description: Naraku Gear Set 16*37 has a 25% increase up gear ratio over the stock gear set (13*40 teeth). Which will provide higher top-end speed without losing power on acceleration. Since the GY6 125/150cc transmission stock gear teeth are 13*40 which = gear ratio 3.076:1 this means the stoc..

Description: Naraku Gear Set 17*36 has a 31% increase up gear ratio over the stock gear set (13*40 teeth). Which will provide higher top-end speed without losing power on acceleration. Since the GY6 125/150cc transmission stock gear teeth are 13*40 which = gear ratio 3.076:1 this means the stoc..

Description: Naraku Gear Set 18*36 has a 35% increase up gear ratio over the stock gear set (13*40 teeth). Which will provide higher top-end speed without losing power on acceleration. Since the GY6 125/150cc transmission stock gear teeth are 13*40 which = gear ratio 3.076:1 this means the..