Products | Yamaha | YZ125 | YZ125 2003
Ref: 2-STR CYL HEAD MOD
This listing is for 1 x modification to your 2-stroke cylinder & head by Pro Circuit USA (for either pump fuel or race fuel)If you have a new or like new 2-stroke cylinder and head that you would like modifying by Pro Circuit USA this is for you!Engine Modifications Information:There is a fine line to building an engine. If the limits are pushed too far (like many engine builders do) there are reliability issues. Pro Circuit's goal is to give you the very best in high-performance service without any loss of reliability. Pro Circuit engine modifications will give you increased power from bottom to top!Pro Circuit has specialized in motor modifications since the early two-stroke Husky days. Pro Circuit's expertise in building the world's most advanced engines is a direct result of working with the fastest and most talented racers. Riders like James Stewart, Ricky Carmichael, Ryan Villopoto, Chad Reed and more have been a great help in our engine development process. In addition, every motor we build is thoroughly tested using our flow bench and race shop dynos. From two-strokes to four-strokes, race bikes to ATV's, almost any machine can benefit from Pro Circuit motor modifications.Please note if you cylinder & head is worn/damaged etc... Pro Circuit USA will not carry out any modifications and your cylinder & head will be returned back to us unmodified (and you will be charged just the shipping cost of the cylinder & head to the USA and return back to your home address).* You will need to send us your cylinder & head that you intend on having the modifications made too (please include name, address, contact number).* We will then send your cylinder & head to Pro Circuit USA for modification.* Your cylinder & head will then be returned back to us in our next delivery from the Pro Circuit USA, or if you require your cylinder & head and would not like to wait for one of our deliveries an additional £69.99 can be paid and we can arrange return shipment as soon as the parts are modified by Pro Circuit USA**All Pro Circuit cylinder & head modifications are sent to Pro Circuit USA so turn around time will be between 2-4 weeks.**If you require any further information or would like any questions answering please send us a message.
OUT OF STOCK
Fits The Following Bikes:Yamaha YZ125 2003Pipe Description:The Platinum Pipe offers the same performance gains as the popular Works Pipe, but utilizes a platinum plating on the body to protect it from everyday elements. Precision in design and engineering makes even the smallest details into a work of art. The Platinum Pipe is a unique fusion of power, elegance and utility that pushes the boundaries of the sport's riding pleasure. Features Include:Stamped AKDQ high quality carbon steel constructionHand welded and pounded seamsReinforced mounting brackets and stingerElectroless nickel plating increases part life 2-10x longer
Fits The Following Bikes:Yamaha YZ125 2002-2019Silencer Description:The 304 silencer is recommended for most two-stroke applications. The slightly longer body offers added top end performance while reducing noise output. The brushed aluminum body and stainless steel inlet tube and end-cap gives you a silencer that looks as good as it performs. Features Include: Longer body design helps to reduce noise output 6061 T6 brushed aluminum silencer body Stainless steel end-cap Tig and mig welded for strength and durability Double-walled mounting bracket(s) Allen head screws ensure easy repacking when needed for extended product life Made in the USA
Fits The Following Bikes:Yamaha YZ125 2002-2019 Silencer Description:The R-304 silencer was developed as a full-race two-stroke silencer. The compact design of the short aluminum canister offers optimum performance gains and is recommended for closed-course racing only. Hex head screws are used to secure the inlet cap and can be removed easily for quick re-packing of the silencer. Features Include: 304 stainless steel intake tube Double-walled mounting bracket(s) 6061 T6 brushed aluminum silencer body Stainless steel end-cap Tig and mig welded for strength and durability Allen head screws ensure easy repacking when needed for extended product life E-Glass internal packing for maximum packing life Made in the USA
Fits The Following Bikes:Yamaha YZ125 2002-2019Silencer Description:The Ti-2 Shorty Carbon Kevlar/Titanium Silencer is the latest piece of racing technology we offer and is guaranteed to be a favorite for most two-stroke riders.The Ti-2 is similar to the popular R-304 Silencer except it is constructed with a carbon Kevlar shell, titanium tubing and titanium end-caps. The titanium and carbon Kevlar construction offers the "factory" look and appearance while reducing weight. The Ti-2 is for closed-course racing only.Features:Optimum performance gainsCarbon Kevlar silencer bodyTitanium tubing and end-capCNC machined aluminum mounting bracketClosed-course racing onlyMade in the USA
Fits The Following Bikes:Yamaha YZ125 2002-2019Silencer Description:The Type 296 Silencer is a quiet spark arrestor that should be used when riding in noise sensitive areas or any National Forest. The Type 296 Silencer is also U.S. Forest Service approved and will reduce your bikes noise level at or near 96dB on most models. Features Include:Spark arrested silencerMeets U.S. Forest Service standardsInternal metal baffle, chambers, and sound absorbing materials for a muffled soundConstructed of aluminum and stainless steelDouble-walled mounting bracket(s)Longer canister design keeps noise levels to a minimumNo loss of motor performance
Ref: YZ125 96 T 04 Vforce
Fits The Following Bikes:Yamaha YZ125 1996-2004The reed valve technology in the vforce 3 is the best and latest on the market,the vforce 3 will increase torque and responce as much as increase peak power,this is all very good news for all racers of motocross and enduro
Fits The Following Bikes:Yamaha YZ125 2002-2019Yamaha YZ250 2002-2019Yamaha YZ250X 2016-2017Yamaha YZ450F 2004-2008Axle Blocks Description:The Pro Circuit Axle Blocks are CNC machined from billet aluminum for lightweight and durability. The axle blocks have adjustment lines on the side which make for precise and easy wheel alignment.Features Include:CNC machined from billet aluminumBrown anodizingAdjustment lines for easy wheel alignment
Fits The Following Bikes:Kawasaki KX65 2000-2013Kawasaki KX85 2001-2013Kawasaki KX100 2001-2013Kawasaki KX125 2000-2005Kawasaki KX250 2000-2007Kawasaki KX250F 2004-2013Kawasaki KX450F 2006-2013Suzuki RM65 2000-2009Suzuki RM80 1996-2001Suzuki RM85 2002-2009Suzuki RM125 1996-2008Suzuki RM250 1996-2008Suzuki RM-Z250 2004-2013Suzuki RM-Z450 2004-2013Suzuki RMX 450 2010Suzuki DR-Z400 2000-2009Yamaha WR250F 2001-2005Yamaha WR426F 2001-2002Yamaha WR450F 2003-2005Yamaha YZ85 2002-2013Yamaha YZ125 2001-2007Yamaha YZ250 2001-2007Yamaha YZ250F 2001-2006Yamaha YZ426F 2001-2002Yamaha YZ450F 2003-2007Brake Lever Description:Pro Circuit Brake Levers are made by Sunline and forged from 6061-T6 aluminum for strength and durability. This lever is designed to fit the stock perch and exceeds OEM specifications.
Fits The Following Bikes:Kawasaki KX250 2005-2008Kawasaki KX250F 2005-2013Kawasaki KX450F 2006-2013Yamaha YZ125 2000-2011Yamaha YZ250 2000-2011Yamaha YZ250F 2001-2008Yamaha YZ400F 1998-1999Yamaha YZ426F 2000-2002Yamaha YZ450F 2003-2008Yamaha WR250F 2000-2002Forged Clutch Lever Description:Pro Circuit Forged Clutch Levers are made by Sunline and forged from 6061-T6 aluminum for strength and durability. This lever is designed to fit the stock perch and exceeds OEM specifications.
Fits The Following Bikes:Kawasaki KX125/250 1992-2007Suzuki RM125/250 1995-2010Yamaha YZ125/250 1996-2019Kawasaki Throttle Tube Description:Pro Circuit throttle tubes are CNC machined out of aluminum, and are Teflon coated on the inside to reduce friction which gives you a smoother twist of the throttle.
Ref: ARC Levers
ARC RC8 & DC8 Clutch Perch(s) - Aluminum or CompositeARC Clutch Lever(s) - Aluminum or CompositeARC Brake Lever(s) - Aluminum or CompositeARC Levers - Life-Time WarrantyClick here for more ...
Ref: WC Elite Perch
Your personalized clutch control system starts here!Choose your body style & colour, the thumbwheel colour and finally, the lever ratio and colour. Easy as 1-2-3!Hot StartsBrake LeversRotaing Bar ClampsReplacement HardwareClick here for more ...
Race proven worldwide by Team Red Bull Honda, Team Monster Kawasaki, Team Makita Rockstar Suzuki and Team JGR Yamaha Improves clutch performance and life Improves heat dissipation Precision machined from billet T-6 aircraft quality aluminum to aerospace tolerances, and Akadized for five times the wear resistance to stock (with proper maintenance) Allows clutch assembly to spin more true creating less heat when clutch is disengaged Helps eliminate clutch chatter when used with Hinson Billetproof Clutch Basket and Pressure Plate
Race proven worldwide by Team Red Bull Honda, Team Monster Kawasaki, Team Makita Rockstar Suzuki and Team JGR Yamaha Improves clutch performance and life Improves heat dissipation Precision machined from billet T-6 aircraft quality aluminum to aerospace tolerances, and Akadized for five times the wear resistance to stock (with proper maintenance) Allows clutch assembly to spin more true creating less heat when clutch is disengaged Helps eliminate clutch chatter when used with Hinson Billetproof Clutch Basket and Inner Hub
Can be used with OE baskets, inner hubs, & pressure plates Developed with and recommended to enhance the performance of Hinson clutch baskets, inner hubs, and pressure plates Provide optimum hook up with minimum heat build up Exceptional production tolerances and flatness Organic, non-abrasive fiber material helps avoid engine damage as plate material breaks down and circulates through the engine via oil Manufactured to OE specs using high quality materials
Eight steel plate kit Can be used with OE baskets, inner hubs, & pressure plates Developed with and recommended to enhance the performance of Hinson clutch baskets, inner hubs, and pressure plates Provide optimum hook up with minimum heat build up Exceptional production tolerances and flatness Manufactured to OE specs using high quality materials
Ref: 24-360 - 24-370
Precision CNC machined from durable, weight saving 6061-T6 aluminum and include pre-drilled safety wire holes for added confidence over the stock nut. Brilliant anodized finish and engraved WC logo\\\'s create that \\\'Factory\\\' look. Pre-drilled for safety wire CNC machined 6061-T6 aluminum CNC engraved WC logos Anodized in Blue, Red or BlackClick here to watch the video...
* One piece cast 6AL-4V Titanium construction yields superior strength and lighter weight than welded Ti pegs * 55mm wide platform with triple cleat design for improved impact dispersion * Open cleat feature to minimize mud buildup * Raised outer teeth for additional grip * Up to a half pound weight savings over stock * Made in the USA Click here to watch the video...
Simple bolt-on item that helps prevent wheelying off the start Billet start button anodized in brilliant Type II RedStainless steel, spring loaded, start pinFork ring hard anodized for durabilityDetailed installation instructions include photos for each stepApproximate install time: 30 minutesDrilling template and countersinking tool includedMade in the USA
Ref: 24-001 thru 24-003
CNC machined from 6061 T-6 aluminum Replaces the stock plastic plug Sealing O-ring includedAvailable Blue, Red or BlackMade in the USA. Click here to watch the video...
Ref: 21-030 thru 21-035
CNC machined from billet aluminum to exacting specifications Polished to a mirror finish prior to anodizing Engraved logo Available in Blue, Red or Black Made in the USAClick here to watch the video...
Ref: 21-700 thr 21-705
CNC machined from billet aluminum to exacting specifications* Polished to a mirror finish prior to anodizing * Engraved logo * Available in Blue, Red or Black anodized finish* Made in the USAClick here to watch the video...
Ref: 17-265 thr 17-320
* Integrated caliper receiver post to ensure precise measurement for true chain alignment* Ultra-slim design precision CNCd from 6061 T-6 billet aluminum* Manufactured with tighter tolerances than O.E.M. parts* Reversible design to keep your axle adjustment bolts from extending beyond their service range* Laser engraved WC logos* Anodized in Blue, Red, Black or Silver (raw)* Made in the USAClick here to watch the video...
Ref: 17-030 to 17-135
Precision CNCd from 6061 T-6 billet aluminumTighter tolerances than O.E.M. parts to help insure accurate alignment of the rear wheel so critical to prolonging chain and sprocket life Reversible design to keep your axle adjustment bolts from extending beyond their service rangeAnodized in Red Made in the USAClick here to watch the video ...
CNCd and formed from aircraft grade 5052 aluminumReinforces radiator to help prevent costly radiator replacement Lightweight, custom fit, tuck in cleanly behind radiator shroudSimple bolt-onMounting hardware included Made in the USAClick here to watch the video - See it in action ...
CNCd and formed from aircraft grade 6061 T-6 aluminumSpecific design and fit for each make and model Covers to protect frame rails but does not extend beyond rails Oil drain access hole pre-cut into the plate for easy oil changes without having to remove the skid plate CNCd aluminum brackets with quality hardware for secure mounting. Some models utilize stock mounting lugs. Skid Plate Foam included. Made in the USAClick here to watch the video...
CNCd and formed from aircraft grade 5052 aluminum Simple bolt-on installation Smoothes out the rough edges on your bike and creates flatter surfaces for better grip and control All necessary mounting hardware includedMade in the USA
* CNCd and formed from aircraft grade 5052 aluminum* Replaces the plastic stock unit * Simple bolt-on* Mounting hardware included * Made in the USAClick here to watch the video...
Fits Most Showa/KYB USD ForksEZ push-button operation eliminates harsh, built up air pressure instantlyRelieving air pressure allows your suspension to operate as designedCompatible with Kayaba and Showa upside-down forks equipped with stock bleeder screws Simple installation replaces OE bleeder screws in minutesTwo bleeder valves with adapters included in setClick here to watch the video...
Fits all.Lets air supply into the fuel tank, but stops fuel from coming outInstalls in place of the stock overflow hose in secondsCNC machined from 6061 T-6 billet aluminumAnodized rich Midnight Black with distinctive laser etched WC logoDurable 19mm long mounting hose includedClick here to watch the video...