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Also for the transmission section of the engine ProX is offering a growing range of high quality components. ProX recently started a complete line of front and rear sprockets. Sprockets are a very important item on your bike as they are THE parts that turn all that engine power into forward drive. The sprockets are always under heavy load and in combination with riding in the dirt it is important to regularly check them for wear. High quality is required here and that’s exactly what the ProX parts offer.

While changing the front sprocket it’s always recommended to inspect the countershaft oilseal that’s right behind the sprocket. Positioned on the high loaded countershaft and always in contact with dirt and water the oilseal can easily start leaking. ProX has developed a wide range of countershaft seal kits. These kits are an easy and complete replacement offering all the needed components and at the same time it is an upgrade kit resulting in improved durability against the OEM parts.

With the installation of the rear sprocket it is never recommended to re-use the old bolts and nuts as the old bolts are usually stretched and stripped while used lock nuts are worn and can loosen up very quickly. ProX offers a nice set of 6 sprocketbolts and nuts for simple and safe fitting of your new rearsprocket!

Check out the ProX catalog to find the right front or rear sprocket, sprocketbolt set and/or countershaft seal kit for your bike.

 

 

The ProX grooved ultra light front sprockets are the top level quality sprockets. Manufactured from low corrosion SCM435 Ni-Chrome Molybdenum steel featuring a low carbon core to prevent breaking while the case hardened surface offers maximum wear resistance.
Precision CNC machining ensure a perfect fit and the lightweight design including lightening holes offer ultimate performance. The sprockets also come with self cleaning dirt grooves to extend chain and sprocket life to the max.
The ProX grooved ultralight front sprockets bring the perfect balance between strength, performance and longevity!
A full range of Dirtbike front sprockets are available in a wide variety of teeth.

ProX Grooved Ultralight Front Sprocket Features

  • Manufactured from low corrosion SCM435 Ni-Chrome Molybdenum steel.
  • Low carbon core to prevent breaking and case hardened surface for maximum wear resistance.
  • Precision CNC machined for perfect fit and lightweight design for ultimate performance.
  • Self cleaning dirt grooves to extend chain and sprocket life to the max.
  • Offering the perfect balance between strength, performance and longevity.
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    The ProX alloy rear sprockets are all manufactured from high grade 7075-T6 material, one of the toughest and strongest alloys available. Complete sprocket is precision cut on fully automated CNC machines using strict tolerances which garantees perfect fit. The alloy sprockets do come with self cleaning mug grooves. Unlike many other rear sprockets, the specially designed mud grooves are positioned outside the pressure area of chains and sprocket to significantly increase durability. Mounting holes are all countersunk and cleaned for perfect fit. The alloy sprockets are machined in a lightweight but strong design that brings a prefect balance between strength, performance and durability.
    A full range of Dirtbike sprockets are available in a wide variety of teeth.

    ProX Alloy Rear Sprocket Features

  • Manufactured from premium 7075-T6 alloy for optimal durability.
  • Precision CNC machined for perfect fit and lightweight design for ultimate performance.
  • Special design mud grooves increases lifetime of chain and sprocket.
  • Offering the perfect balance between strength, performance and longevity.
  • Full range of Dirtbike sprockets available in a wide variety of teeth.
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    ProX Racing Parts Ultra-Light steel rear sprockets all manufactured from premium quality "Qste 420 & 460" high strength steel and offer superior durability, even under the most extreme riding circumstances. ProX Racing Parts steel rear sprockets will last 2-3 times longer than aluminium sprockets made from T7075-T6.
    ProX Racing Parts has chosen for an Ultra-Light version to keep the weight of the turning rear wheel of the bike as low as possible, which improves the handling of the bike. The Ultra-Light rear sprockets are significantly lighter than other aftermarket full steel or alloy centred steel rear sprockets.

    The centre holes are precision cut on CNC machines using tight tolerances. The mounting holes are all countersunk and cleaned for perfect fit. The teeth are cut with a special procedure called "Diamond Cut" which keeps tolerances of overall diameter and wobble under 0.2 mm. and will guarantee super smooth running.
    The sprockets are machined in a lightweight, but strong design that brings a perfect balance between strength, performance and durability. A full range of Ultra-Light steel Dirt Bike sprockets are available in a wide variety of teeth.

    ProX Steel Rear Sprocket Features

  • Manufactured from premium "Qste 420 & 460" high strength steel for superior durability.
  • Precision CNC machined for perfect fit and lightweight design for ultimate performance.
  • Offering the perfect balance between strength, performance and longevity.
  • Full range of ultralight steel Dirtbike sprockets available in a wide variety of teeth.
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    Together with the 7075-T6 Alloy and Ultralight Steel rear sprockets in the range ProX also offers the rear sprocket bolt sets. Whenever changing your rear sprocket it is never recommended to re-use the old bolts and nuts again. The old bolts are usually stretched stripped while used lock nuts are worn and can loosen up very quickly giving a severe chance of chewing your hub or swingarm resulting in a possible crash and expensive repair bill.

    ProX rear sprocket bolt sets contain 6 pieces of M8x25 bolts and 6 pieces of flanged nylon lock nuts. Bolts are made out of grade 12.9 high strength steel and feature a chromed surface for anti corrosion. Using a large M8 socket head wrench it strongly grabs the tool for easy installation and removal without spinning and ruining the bolt heads. The nuts are flanged and do feature a nylon lock ring preventing the nuts and bolts coming loose.

    The tapered heads do fit most common Japanese and European MX and Dirtbikes.

    One partnumber: 07.SBSM825

    ProX Rear Sprocket Bolt Set Features

  • Comes in complete set of 6 pieces bolt and nuts.
  • Bolts are manufactured from grade 12.9 high strength steel featuring chromed surface for anti corrosion.
  • Large M8 socket head for easy installation and removal.
  • Flanged nuts feature nylon lock ring preventing nut and bolt coming loose.
  • Tapered heads do fit most common Japanese and European MX and Dirtbikes.
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    ProX has developed a premium line of Drive Chains to team up together with the ProX front and rear sprockets. The ProX Drive 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.

    ProX MX and X-Ring Drive 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
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    ProX countershaft seal kits are developed as an upgrade replacement for the OEM parts. The kits are supplied as complete package, consisting of an upgraded seal, a hardened bushing plus o-ring, snap ring or lock washer where applicable.
    A full range of Dirtbike and ATV kits are available.

    ProX Countershaft Seal Kit Features

  • Complete package developed as upgrade replacement.
  • Upgraded oilseal.
  • Hardened steel bushing.
  • O-rings, snap ring or lock washer supplied where applicable.
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