WR250R: Drivetrain

High Quality chain. Will need to be cut to fit your sprocket combination.

Always carry a spare master link when out on the trail.

  Master links are not interchangeable. Be sure to check the manufacturer and series on your chain.

These do not fit the TW200 or XT250. Only for 520 os 525 chains, Please verify chain size.

High quality steel front sprocket

For reference, the stock gearing for the WR250R is 13/43 while the X model runs 13/42 stock gearing.

For reference, the stock gearing for the WR250R is 13/43 while the X model runs with a 13/42 stock configuration because of the SM wheels/tires. Both use a 108 link chain with the stock gearing.

The JT rear sprockets listed are made from the finest 545C high carbon steel and are then heat treated and hand finished to meet or exceed OEM standards. Outlasts many mild steel or surface hardened sprockets as much as two and three times over.

Limited availability on Aluminum from PBI. Manufactured from aircraft 7075 T651 Plate Aluminum.

If you want the additional low-end grunt that the 46, 48 or 50 tooth rear sprocket will give you, you will need longer chain as well.

New Rear Sprockets require new Sprocket Bolts because of a difference in the holes vs. the stock bolts.

A set of six high quality grade 10 sprocket bolts with lock nuts. Thread-lock compound has already been applied for extra security.

These bolts are flat head style, requiring a countersunk hole in the sprocket.

This an OEM replacement nut for your front sprocket.

The Moose Racing is a quality chain roller with 2 sealed ball bearings. The stock roller has no bearings. It's just a plastic wheel riding on a bolt. Ball bearing chain rollers are smoother, quieter and last longer.

Reduce the friction dragging down your drivetrain.  This chain roller is made from Delrin®, it's self-lubricating and a significant improvement over stock. 

Does not use a bearing but rides directly on the frame boss. There is no mounting hardware included.

• Accurately and quickly measures chain slack
• Two scales measure both chain slack and chain to swingarm clearance
• Setting chain slack properly dramatically improves chain life
• Lightweight compact design fits easily in your tool box or road kit
• Works on most street and dirt bike applications up to 75mm chain slack
• Made from engineered nylon with aluminum measuring scale
• Anodized laser-etched precision measuring scale
• Refer to your owner's manual for proper chain slack and procedure
• Patent pending

Designed for quick and accurate alignment, this tool clamps squarely to the rear sprocket so the alignment rod can indicate sprocket alignment with the chain.

Here is a tool to help you remove a few links from a chain that is too long. A great tool to have in your tool box.

The head of the pivot pin you are going to remove must be ground down level with the side plate before using this tool to push it out. Failure to do that will cause damage to the tool that is not covered by any warranty!

• PBR = press, break, rivet
• Innovative design will press, break and rivet 520, 525 and 530 chains with one convenient tool (not for use on 428 chains)
• Versatile design will remove chain pins, press master-link plates and rivet hollow nose and soft nose (quad stake) master link pins on O-Ring and non O-Ring type chains
• Easy-to-use design allows you to change tool functions by simply moving the position of the anvil block
• Indexing letters on movable anvil and body ensures correct tool configuration; simply line up the letter on the anvil to the letter on the body to get the configuration you need
• All components conveniently store on tool when not in use
• All steel construction with heat-treated components for strength and durability
• May be supported in a vise or held with included handle
• Great for the professional technician or DIY mechanic
• Compact and light enough to carry in a tool bag for trail-side repairs
• Patent Pending

Can break or rivet chains from #35 to #530 like a pro.

kit includes a 2mm, 3mm, and a 4mm pin to fit most chains.

kit includes press plates,and all necessary riveting pieces and comes in a durable plastic case.

NOTE: when breaking a chain, YOU MUST grind the heads off of both pins on a link first.

Innovative design that cleans chain from 3 angles at once. Long handle keeps fingers and hands away from chain and sprockets.

• Will not harm O-ring chains
• Easily adjustable for all chain sizes

Make your life a little easier by having a set of these in your toolbox. Designed to simplify installation and removal of clip-type master links. One tip is shorter and notched to be placed on the pin which allows the longer end to push the clip.

This Motion Pro press tool is a must have when installing and removing Clip-Style master links (520, 525 & 530 sizes).

Easily presses on and off master link plates, works on 520, 525 & 530 Clip-Style master links.

Maximum master link width 24.8mm.

Will not damage master links, hardened steel pins for reliable use.

Light weight billet aluminum construction.

A high quality master link press tool from Wirth Machine used for the removal and installation of master links using a press fit link plate.

Fits 520, 525, and 530 pitch chain.

ULTIMATE SPROCKET WRENCH KIT

• 12” long wrench gives you more torque to get those thread locked sprocket bolts off easily
• Double ended 12mm & 13mm to fit all modern motocross, Enduro and dual sport bikes
• Dog leg wrench design allows wrench to easily clear rim edge and wide tires
• 8mm allen fits most Japanese bikes 8” long for extra leverage
• Torx T45 fits late model KTM and Husqvarna bikes, 8” long for extra leverage
• Vinyl coated handles to protect rim edge and give a non slip grip
• Makes routine sprocket bolt maintenance a quick and easy job