New: ProX Carburetor Rebuild Kits for Dirt Bikes and ATV/UTV’s

ProX Racing Parts high quality carburetor rebuild kits are the easy solution to rebuilding your carburetor. If your carburetor is leaking, or the fuel distributions is disturbed. ProX Racing Parts offers a kit with all components you need.

The rebuild kits include the following components:

  • All O-rings
  • Gaskets
  • OEM Size Jets (standard jet sizing for your bike or ATV)
  • Needle
  • Mixture screw
  • Float bowl screws
  • Float valve needle + seat

The rubber O-rings are made of NBR rubber material with excellent resistance to the ethanol used in today’s fuels.

Carburetors which are standard equipped with paper float bowl gaskets are upgraded to high performance Interface™ gasket material.

It’s simple:

ProX Racing Parts carburetor rebuild kits include all of necessary components to repair a carburetor, including float bowl and cap hardware.

ATV models with two carburetors include components to repair two carburetors.

ProX Carburetor rebuild kits are available for a wide range of Dirt Bike and (Sport) ATV/UTV applications.


New Productline: Head & Base Gaskets

In addition to the ProX Complete and Top-End gasket sets a new assembly is set-up, the ProX Head & Base gasket sets. Where the Top-End gasket set contains all components for a complete piston rebuild the new ProX Head & Base gasket sets just contain 1 head gasket and 1 base gasket. This results in a more cost efficient kit when not all components are being replaced.

The Head & Base gaskets are made of all premium base materials. Each gasket is precision cut for optimal fit and prefect seal.

A full range of Dirtbike Head & Base gasket is available.

ProX Head & Base Gasket Features :

  • Manufactured of all premium base materials
  • Precision cut for optimal fit and perfect seal
  • Cost efficient assembly
  • Full range of Dirtbike sets available

In the spotlight: ProX throttle & clutch Cables

In the spotlight: ProX throttle & clutch Cables

A complete new program has been added to the already wide program of ProX Racing Parts products. ProX Clutch & Throttle Cables are high quality products that meet or even exceed OEM quality. The cables are manufactured to exact OEM specifications to offer maximum performance.

All cables are equipped with pre-lubricated nylon inner sleeves and tightly coiled inner casings, this combined with a flexible PVC outer jacket and strong steel inner cable offers high durability and smooth control.

The cable are easy to assemble due to the appropriate length with all necessary mounting parts. Our thorough quality control and use of high quality materials guarantee the perfect fitment. ProX Racing Parts offers a wide range of control cables for an extended range of Dirt Bike applications.

ProX Snowmobile pistons

New Snowmobile Pistons for Artic Cat and Ski Doo Models!

New ProX Snowmobile pistons for Artic Cat and Ski Doo Models soon available from stock.

ProX Racing Parts has added new pistons to their already wide product program of snowmobile engine components. The high quality parts are made specific for your application to give your engine the best performance. And the parts are priced well!

If you need to replace your pistons, we offer a piston bearing for free in the box and we have complimentary gaskets set to rebuild your top end!

Some interesting features:

  • Manufactured to OEM specifications and machined on the latest, state of the art CNC equipment.
  • Made from low expansion, low-friction alloy like all major OEM engine manufacturers.
  • Anodized piston crown and ring groove for improved heat insulation.
  • Piston skirt is MOS2 coated for break in and reduced friction.
  • Piston rings are manufactured to exact specifications and tolerances, and can be used on Nikasil and
    cast iron cylinder bores.
  • High quality piston pins from the latest materials and best performance.
  • Top end bearing is included with every ProX snowmobile piston, a great value that saves you time and cost!
  • Artic Cat
  • Ski Doo
  • Arctic Cat EXT 550 ’91-95 + Pantera ’93-05 Arctic Cat ZRT600 ’96-00 + EXT600 ’96-98
  • Ski-Doo MXZ500 Fan ’01-02 + Skandic ’87-03 Ski-Doo 253 Engine Type (single cylinder) ’79-99 Ski-Doo 503 Engine Type ’79-03 Ski-Doo 536 Engine Type ’89-91 Ski-Doo 537 Engine Type ’86-88 Ski-Doo MXZ500 ’98-99 + Formula 500 ’98-00 Ski-Doo 494 Engine Type (Twin) ’97-01 Ski-Doo 779 Engine Type (Triple) ‘1993-98 Ski-Doo 809 Engine Type (Triple) ’97-03 (01.5598.100 is standard bore size) Ski-Doo MXZ670 ’97-98 + Formula 670 ’93-99

Find your application by using our part search.

Hay Days Sno Barons'

ProX @ Sno Barron Hay Days, US

ProX Racing Parts was attending the famous Sno Barons’Hay Days in North Branch, MN in the USA. We had a booth and we received very good feedback and interest on the ProX Snow pistons and gaskets! And you know what, they are right, it is good stuff!

Japanese genuine pistons

Genuine Japanese Quality Pistons

Genuine Japanese Quality

Although ProX Racing Parts has added new product lines the last couple of years, we are known for our Japanese genuine quality pistons and connecting rods. ProX offers a wide range of piston and connecting rods kits for 2 stroke and 4 stroke applications. All are mainly made in Japan by OEM factories to guarantee the same quality as OEM brands like Honda, Yamaha or Suzuki.

All 2 stroke pistons are cast pistons. Cast pistons are able to contain higher silicon content compared to forged pistons. The casting proces allow this higher silicon content. Next to this 2 stroke engines have lower cylinder pressures compared to 4 stroke engines. Cast pistons are ideal for 2 stroke engines. ProX Racing Parts genuine pistons are gravity cast from an aluminum alloy with approximately 18% silicon content.

Cast genuine 4 stroke pistons are used in relatively low performing engines like the Honda XR400R or Yamaha XT600, but many motocross and ATV applications use forged 4 stroke pistons as the cylinder pressure has risen. Forged genuine pistons are stronger, the alloy is pushed under extreme pressure to a form. The material structure is more dense and can cope with higher pressures. ProX Racing Parts offers both 4 stroke pistons, cast and forged! All made at reputable factories to be sure you get the best!

Pistons are made from aluminum alloys as they are light. The content and mix of the alloy is determined by the application and engine system. A 2 stroke piston is made from different material than a 4 stroke piston as the forces and heat distribution in the engine differs.

Skirt Coating:

Most of the ProX pistons come with a coating. Coatings on the piston skirts improves the wear in process when you just started the engine. A new piston needs to get the chance to adjust to the cylinder like the piston rings. We have developed a new skirt coating that not only assists the wear in process, but also helps reducing friction after the wear in. The black coating is made from a delicate mix of materials and will increase the performance.

Look up more detailed technical stuff on our piston details pages.

ProX Oil Filter news

New: ProX Oil Filters for Dirt Bikes and ATV’s

ProX Racing Parts Oil Filters are high quality filters manufactured from the finest materials only. To reach the high level of quality and consistency, the raw materials are supplied by a selected group of leading manufacturers in the industry.

The oil filters are manufactured under strict tolerances and quality control. The various quality control steps in the manufacturing process makes the ProX Oil Filter one of the best filters in the world. The exclusive design and strict production process brings the perfect combination of protection and performance!

Every oil filter goes through 16 individual quality control checks before it is ready to leave the factory. The whole manufacturing process, including the checking of raw materials, individual filter testing, is regularly audited.

Constructed using the best materials available, all Hiflofiltro oil filters meet or exceed original equipment performance levels.

ProX Racing Parts Oil Filters are available for a wide range of Dirt Bike and Sport ATV models.

New: ProX Brake Caliper Rebuild Kits

New in our assortment: ProX offers a complete line of brake caliper rebuild kits. These kits are assambled with high quality components all designed and manufactured to meet or exeed the OEM parts. Each kit contains all the necessary components like rubber boots, seals, bleeder cap, brake pad retaining pins and copper washers to rebuild the brake caliper.

ProX Gold Drive Chain for MX and ATV’s now Available

ProX has developed a premium line of Roller Chains to team up together with the ProX front and rear sprockets. The ProX Roller Chain is a top quality chain, exclusively manufactured for ProX by a reputable and leading OEM factory in Japan. All ProX chains are made using highest grade Japanese steel.

The MX motocross chains are assembled out of various different components that all have their specific and crucial function to make the chain a high quality product. The pins feature an exclusive pin treatment providing an extremely hard outside coating, leaving a softer inside to increase strength while reducing overall chain wear. The pins are heavy press fitted and do feature quad staked riveting for an ultra-strong connection.

The solid bush inside the shot-peened, solid roller and plates are all heat treated to offer an incredible tensile strength in combination with low friction and high wear resistance.

Inner plates are designed in a specific shape allowing less material to be used. The combination with the unique lightning holes results in a 3% overall lighter chain
without compromising tensile strength.

Specifically for the Offroad, Enduro, ATV and big 4-Stroke Motocross bikes, ProX also offers a lightweight, narrow type X-Ring chain using a QX-type seal offering 40% less friction and at least 150% increased durability over a standard MX Chain.

All ProX chains are pre-stressed and pre-stretched to reduce initial chain stretch and immediate performance and come with a clip type chain link as standard.

Gold Chain Features:

  • Exclusively manufactured for ProX Racing Parts by a reputable and leading OEM factory in Japan
  • Pins features special treatment providing an extremely hard coating leaving softer inside to increase strength while reducing overall chain wear
  • Pins are heavy press-fitted and do have quad staked riveting for ultra-strong connection
  • Solid type bush, roller and plates are all heat treated for incredible tensile strength in combination with low friction and high wear resistance
  • Inner plates are designed in specific shape and in combination with unique lightning hole resulting in 3% overall lighter chain
  • X-Ring type chain uses QX-type seal offering 40% less friction and at least 150% increased durability over standard MX chain
  • All chains are pre-stressed and pre-stretched to reduce initial chain stretch and immediate performance
  • Chains come with a clip type chain link as standard. Separate chain links available for each type of chain