Crankshafts & Accessories

Crankshafts & Accessories

ProX crankshaft assemblies come as complete and are ready for easy installation. The cranks are all engineered, assembled and precision trued after OEM specifications.

The high quality forged connecting rodkit, bearings and precision machined crankwebs will meet or exceed the OEM crank in performance and durability.

All ProX crankshaft assemblies are completely rebuildable with genuine ProX connecting rodkits.
Connecting rod kits

Connecting rod kits

One of our core product line, where we became famous with. Our ProX Connecting Rod Kits are made out of the toughest alloys available today and are made in Japan! O.E.M specifications and tolerances are meticulously maintained, a guarantee for easy installation and trouble free performance. Find our connecting rod dimension overview here.

ProX Rod Kit Features

  • Manufactured by leading Japanese OEM factories.
  • Designed to exact OEM specifications to be a direct and cost efficient OEM replacement.
  • Complete line for Dirtbike, ATV, PWC and 50cc/scooter available from stock.

Double forged on dedicated forgings

This process maintains superior strength, durability and dimensional consistency through improved grain flow.

Shot peening & barrelling

The design of a connecting rod is very important to guarantee the lifespan and the performance. Our connecting rods are barrelled and shot peened to improve the surface texture. Shot peening eliminates residual stress and smoothly blends the forging surfaces.

Oiling system

Our ProX oiling slots are precisely located to maximize lower rod oiling and extend bearing life. Even under the most extreme conditions the rod will do its job. ProX Connecting Rod Kits come complete with Crankpin, Big-End Bearing, Small End Bearing and Washers.

Check our latest video about ProX connecting rods below:

Crankshaft Assemblies

Crankshaft Assemblies

We have developed a full program of crankshafts for Dirt Bikes, assembled with our well known Japanese ProX Racing Parts forged connecting rods. The ProX double forged connecting rod with high quality Japanese big-end bearing and precision machined crank webs will meet or exceed the OEM crank in performance and durability. All ProX crankshaft assemblies are completely rebuildable with genuine ProX or OEM connecting rod kits, bearings and seals. Looking for the perfect match, ProX Racing Parts offers crankshaft bearings and seals as well. We specially developed our Crankshaft Bearing & Seal Kits. If your crankshaft is worn beyond OEM specifications, scratched or has experienced excessive heat, a rebuild or new crankshaft is required. ProX Racing Parts has the quick and easy solution offering a true drop-in ready crankshaft, fully assembled to OE specifications. Every crank has been expertly engineered and rigorously dyno-tested to ensure it exceeds the highest quality standards.
  • All ProX Racing Parts Crankshafts are fully assembled
  • Crankshafts are precision trued against OEM specs
  • Crankshafts meet or exceed the OEM crank in performance and durability
  • Including our well know Japanese ProX rod containing high quality Japanese big-end bearing
  • Including a top-end bearing where applicable
  • Our crankshafts are completely rebuild-able with ProX or OEM parts
All ProX Racing Parts crankshaft assemblies are attractively priced and offers you the best value for money! The matching crankshaft bearing and seal kits are available separately. The Genuine Definition of Racing The assembly contains a balanced crankshaft with ProX connecting rod.
Crankshaft oilseals

Crankshaft oilseals

ProX Crankshaft Oil seals are made at the O.E. manufacturers in Japan. The Crankshaft Oil seals are available for many different applications like Motorcycle, ATV and Personal Watercraft.
Big end bearings

Big end bearings

High output engines require high end parts. For these specific engines, like motocross and ATV engines we offer flat silver big end cages. These bearings are able to cope with the high rpm’s of these applications. For all other applications we offer high quality M-style cages.
Crank webs

Crank webs

ProX crankwebs are designed to OEM specs and manufactured after tight tolerances. The crankweb sets can be used in combination with our high quality rods to repair your expensive OEM crank.

The triple cylinder application crankwebs come with a cast-in pin for added strength and prevent twisting of the webs.
Crankshaft Bearings

Crankshaft Bearings

ProX offers a wide range of crankshaft bearing of well known brands like Koyo, NTN, etc in C3 and C4 graduations. The high quality bearings will fit perfectly to OEM and aftermarket crankshafts.

ProX crankshaft bearings are manufactured at leading OEM factories, mainly in Japan. All bearings are made to exact OEM specifications, to ensure maximum quality and performance. ProX uses respected brands like Koyo & NTN to ensure quality. These brands are used by OEM brands like Yamaha, Kawasaki, Honda, Suzuki and KTM. ProX bearings offer high durability.

Take the easy route: ProX Crankshaft Bearing & Seal Kits offer you reliability and carefree driving. The sets contain all parts you need for rebuilding your crankshaft and can be used in combination with all other ProX or OEM crankshaft related products. Next to the high quality ProX connecting rod kits the Crankshaft Bearing & Seal Kits are completing the crankshaft parts program.
Crankshaft Bearing & Seal Kits

Crankshaft Bearing & Seal Kits

ProX crankshaft bearings and seals are manufactured at leading OEM factories, mainly in Japan. All bearings and seals are made to exact OEM specifications, to ensure maximum quality and performance.

ProX uses respected brands like Koyo, NTN, NOK and ARS to ensure quality. These brands are used by OEM brands like Yamaha, Kawasaki, Honda, Suzuki and KTM. ProX bearings offer high durability and the seals make sure to keep the oil in and dirt out of the engine.

ProX Crankshaft Bearing & Seal Kits offer you reliability and carefree driving. The sets contain all parts you need for rebuilding your crankshaft and can be used in combination with all other ProX or OEM crankshaft related products. Next to the high quality ProX connecting rod kits the Crankshaft Bearing & Seal Kits are completing the crankshaft parts program. These new sets will be the easiest and best replacement for your Dirt bike, ATV and PWC.

Big end pins

Big end pins

Our chromed crank pins are specially designed for the application. Every ProX crank pin is machined precisely and treated to get the best hardness and properties to stand the extreme conditions where it is used for. Our 4 stroke crank pins have precision located oil canals to maximize oiling under extreme conditions.