Main Menu
Your Cart

Crankshaft


Crankshaft & Piston Attribute:
1.    Crankshaft Assembly
2.    Piston
3.    Piston Assembly

4.    Piston Rings
5.    Woodruff Keys 4x13.8
6.    Wrist Pin
7.    Wrist Pin Clips

The piston rings placement on the piston is crucial to proper compression and oil distribution.

•    Top Ring if it has writing usually will have a 1 and or a single letter that needs to face visible top. The top ring is usually polished as well.

•    2nd Ring if it has written will usually have 2 and or a letter or pair of letters that need also a face visible top.

•    Expanding Ring is the wavy ring on the inside with the two thin flat smooth Side Rings on the top and bottom. They make a group called the Oil Rings.

•    Gapping the rings in reference to the other rings.  The Mercedes Benz Logo helps to remind of their 120-degree rotational offsets.

Scooter crankshaft stroker increases standard stroke add more displacement equals more power!

Brand: 101-Octane Part #: BT7001-16
Description: 101-Octane Crankshaft 41.4mm Performance Stroker 16-Teeth for 130QMB 49/50cc 4-stroke engine. Standard stroke 41.4mm. When used in conjunction with a 52.4mm cylinder big bore, total displacement cranks out at a whopping 89.3cc!The crank is pre-pressed with main bearings and a ..
$73.59
Brand: Ban Jing Part #: 169-553
Description: Ban Jing Crankshaft 57.8mm +3mm Stroker Crank increases standard stroke by 3mm more displacement equals more power for GY6 125/150cc+ 4 Stroke! Include a 1mm cylinder base spacer with an inner bore diameter of 65mm, 57mm stud spacing, perfect for a bolt-on SSP-G Cylinder 63mm BBK&n..
$229.95
Brand: G Part #: 1100-1190
Description: GY6 Crankshaft 57.8mm Standard Stroker assembly for GY6 125/150cc 4-stroke 152QMI / 157QMJ engines.Temperature Modification May Be Required: You'll need to heat the aluminum crankcase area where the crankshaft bearing side will be placed, in order to immediately fit the frozen cran..
$57.00
Brand: G Part #: 1100-1358
Description: Oil Seal Set for the GY6 4-stroke 125-150cc Kymco engines (scooters), and most Chinese imported vehicles 125/150cc (scooters, quads, and buggies). Set includes 4-piece oil seals.Specifications:Includes the following Engine crank and transmission oil seals.•    1x Fly..
$17.95
Brand: G Part #: 169-169-58.5
Description: 4-Valve Piston 58.5mm Set for 4-stroke GY6 Engine.NOTE: Boring and machining may require unless used Taida Crankcase (Part# GY6-KS-S or # GY6-KS-L).Specifications:Includes the following Piston + Rings, Wrist pin, Locking rings.•    1x Piston:..
$39.95
Brand: G Part #: 169-169-61
Description: 4-Valve Piston 61mm Set for 4-stroke GY6 Engine.NOTE: Boring and machining may require unless used Taida Crankcase (Part# GY6-KS-S or # GY6-KS-L).Specifications:Includes the following Piston + Rings, Wrist pin, Locking rings.•    1x Piston: 6..
$52.00
Brand: G Part #: 169-169-63
Description: 4-Valve Piston 63mm Set for 4-stroke GY6 Engine.NOTE: Boring and machining may require unless used Taida Crankcase (Part# GY6-KS-S or # GY6-KS-L).Specifications:Includes the following Piston + Rings, Wrist pin, Locking rings.•    1x Piston: 6..
$44.00
Brand: G Part #: 151-122
Description: Woodruff Key for 49cc-50cc 4-stroke 139QMB engines. Standard clutch-side woodruff key for QMB engines. Just wedge for positioning for the alternator rotor side of the crankshaft. Sold individually. Specifications: Include the following woodruff key.•    1x Woodruff Key L: 12.9..
$1.99
Brand: G Part #: 1100-1213
Description: GY6 woodruff key for 125cc and 150cc GY6 4-stroke engines. Standard clutch-side woodruff key for GY6 engines. Just wedge for positioning for the alternator rotor side of the crankshaft. Sold individually. Specifications:Include the following Woodruff key.•    1x Woodruff Key L..
$2.95
Hoca Crankshaft +2.5mm Stroker (GY6) Hoca Crankshaft +2.5mm Stroker (GY6)
Non-Stock
Brand: Hoca Part #: 169-47
Description: Hoca Crankshaft 57.8mm +2.5mm Stroker Crank increases standard stroke by 2.5mm more displacement equals more power for GY6 125/150cc+ 4 Stroke!Temperature Modification May Be Required: You'll need to heat the aluminum crankcase area where the Hoca Crankshaft bearing side will be pl..
$172.00
Brand: Koso Part #: 128-18
Description: Koso Cylinder 61mm 170cc 4V with Forged Piston for Honda Grom, Honda Monkey 125cc Engine. This complete 170cc Big Bore Kit with 4V Cylinder Head Kit is the perfect add‑on for all horsepower enthusiasts looking for performance! It includes a 170cc ceramic coated cylinder, forge..
$1,039.95
Brand: Koso Part #: 128-8
Description: Koso Piston Forged 61mm Set 170cc for Honda Grom, Honda Monkey Engine. Compatible with 2014-2021 Honda GromSpecifications:Includes the following Piston + Rings, Wrist pin, Locking rings.•    1x Forged Piston: 61mm*•    5x Piston Rings: 61mm / Thick: 0.8|0.8|2.0•..
$110.95
Brand: Naraku Part #: NK100.81
Description: Naraku Crankshaft 41.4mm Heavy-Duty Stroker 16-Teeth for 130QMB 49/50cc 4-stroke engine. Standard stroke 41.4mm. When used in conjunction with a 52.4mm cylinder big bore, total displacement cranks out at a whopping 89.3cc!Naraku crankshaft in OEM-quality to match Japanese and Taiwa..
$151.95
Brand: Naraku Part #: NK101.70
Description: Naraku Crankshaft Needle Bearing 17x12x13mm for Honda DIO and Honda Elite. OEM Replacement Naraku Crankshaft Needle Bearing 17mm (OD) x 12mm (ID) x 13mm (W) and cage assemblies for the crankshaft and piston pins for Honda Dio (AF16-AF18E) engines. OEM quality small end bearing (17x12x13..
$15.95
Brand: Naraku Part #: NK102.03
Description: Naraku Oil Seal Set for 139QMB 49/50cc 4-stroke engines. Complete set of quality crank oil seals from Naraku. Set contains all the important oil seals found in the engine. A must for engine overhauls. Purchasing individual shaft seals is usually more expensive, and when working on the e..
$19.95
Brand: Naraku Part #: NK102.01
Description: Naraku Oil Seal Set for Kymco 49/50cc, and Sym 49/50cc scooters with horizontal cylinders. Set contains all the important oil seals found in the engine. A must for engine overhauls. Purchasing individual shaft seals is usually more expensive, and when working on the engine or the gearbo..
$19.95
Brand: Naraku Part #: NK102.07
Description: Naraku GY6 Oil Seal Set, complete set of 4. This is a complete set of genuine Naraku oil seal set for the GY6 4-stroke 125-150cc Kymco engines (scooters), and most Chinese imported vehicles 125/150cc (scooters, quads, and buggies). Set includes 4-piece oil seals.Specifications:Includes ..
$19.95
NCY Piston Alumin 50mm 81cc Set (Honda Dio) NCY Piston Alumin 50mm 81cc Set (Honda Dio)
Non-Stock
Brand: NCY Part #: 1100-1497
Description: NCY Piston Alumin 50mm 81cc Set for Honda Dio (AF16-AF18E) engines. The piston is 50mm. The bore size is 50mm pair with stock crankshaft stroker 41.4mm = 81cc! Cylinder bore and crankshaft stroker not included, sold separately.NOTE: Properly break in your big bore kit and add about..
$62.00
Brand: NCY Part #: 1100-1379
Description: NCY Piston Rings made by Prima for your Genuine Buddy 50cc,  Genuine RoughHouse 50cc, and Minarelli scooter. Will fit NCY Prima Cylinder Kit: 47mm 72cc, 10mm wrist pin.Specifications:Includes the following Piston rings.•    2x Piston Rings: 47mm•    Made in..
$31.00
Brand: NCY Part #: 1100-1498
Description: NCY Piston Rings 50mm Set for Honda Dio (AF16-AF18E) engines. The piston ring set is for 50mm Piston Cylinder. Piston and cylinder sold separately.NOTE: Properly break in your big bore kit and add about an ounce of 2 stroke oil to your gas tanks. 50cc oil injectors are not mea..
$30.00
Brand: Polini Part #: 146-65
Description: Polini Crankshaft for Horizontal Minarelli Engines. This Polini full circle crankshaft has been balanced and features an oversized, strengthened connecting rod, making it suitable as both a stock replacement crankshaft and/or a racing crankshaft.NOTE: This does not include crank be..
$155.00
Ruima Crankshaft +2.5mm Stroker (GY6)
Non-Stock
Brand: Ruima Part #: 1100-1015
Description: Ruima high-performance stroker crank for GY6, Buddy 150, and Blur 150. Increases standard 57.8mm stroke by 2.5mm. More displacement equals more power!Temperature Modification May Be Required: You'll need to heat the aluminum crankcase area where the Ruima Crankshaft bearing si..
$214.00
Brand: SSP-G Part #: 169-239
Description: SSP-G Crankshaft 44mm Performance Stroker 16-Teeth (139QMB) increases standard stroke by 2.6mm-more displacement equals more power! When used in conjunction with a 52.4mm cylinder big bore, total displacement cranks out at a whopping 94.9cc! The crank is pre-pressed with main bearings a..
$189.95
Brand: Stage6 Part #: S6-80366C4-MET
Description: Stage6 Crankshaft Bearing & Oil Seal HQ Set for Yamaha Zuma 50cc, Minarelli 50cc 2-stroke scooters. Especially with high-performance engines, you should not be too stingy when it comes to buying crankshaft bearings. This is why Stage6 only collaborates with leading European and..
$32.75
Brand: Stage6 Part #: S6-80340C4-MET
Description: Stage6 Crankshaft Bearing & Oil Seal Set for Aprilia, Piaggio 50, Vespa 2-stroke engines. Especially with high-performance engines, you should not be too stingy when it comes to buying crankshaft bearings. This is why Scooter-Attack only collaborates with leading European and J..
$45.55
Showing 1 to 25 of 69 (3 Pages)