We believe 125s and low cost two-strokes are good for our sport, and with a bit of a revival going on with the 125 Dream Races and efforts in Lucas Oil Pro Motocross, we know these bikes are still capable of great racing when raced against other 125s. For this latest build, Jay Clark found a blown-up 2004 RM125 that needed some love.
The cylinder was taken off because of damage, and the air boot/carb were both so full of dirt and mud you could plant a garden. So, with a cylinder shipped off to Millennium for a full repair and the Vertex Piston, he was set to do the rest of the work: powder-coat the frame, rebuild all important bearings and seals, and rebuild the entire bottom end with the Wrench Rabbit kit. All-Balls kit was used on the carb with a new Fuel Star Petcock to help ensure good fuel flow.
Jay figures that for under $1,000, you can repair the engine and cylinder if you do the work yourself. Then for another $1,500, get your frame, wheels, and suspension all gone over. For under $3,000 on top of the $400 investment of the blown-up bike, we have a beautiful machine. Jay didn’t build this to go race against former pros chasing their glory days; there was no big bore and no porting done. This is meant for a beginner to novice rider to get into riding and do so cheaply.
This project shows you can fix up your dead 125 laying in the barn.
The Wrench Rabbit kit has all you need to do it right; Vertex Piston, Hot Rods Crank and bearings along with the gaskets to do the job completely.
Re-worked Wheels by Faster USA
Powder Coated Frame from San Diego Powder Coating
Full rebuild in one box (four stroke kits include cam chain)
Complete Bottom end kit Includes complete crankshaft, main bearing seal kit and complete engine gasket kit. Also includes transmission bearings.
Pro Replica Piston kit (ring, pin and clips)
Strip, re-pair damage and re-plate to stock size
Rear alum Sprocket 53T
Front Sprocket 13T
Carb Rebuild kit
Two-Stage air filter
Basket, hub and pressure plate
Fibers, steels and springs clutch kit
Stock hubs treated and rebuilt with new spokes and Excel rims
Rear Brake Clevis
Fuel Valve Assy with hose
Full plastic kit
Sandblasting, powder with superdurable clear, and “race prep masking’
V-Force Reed Cage
Steering stem bearing kit
Linkage rebuild kit
Swing arm rebuild kit
Dual compound grips
MX3S front 80/100-21
MX3S Rear 100/90-19
Titan throttle tube
Custom Cool seat cover
Elite Clutch Perch
Front Brake lever
Oil filer Plug
Front oversized and rear rotor
Front and rear Brake pads
San Diego Powder Coating
Sandblasting, powder sparkle silver with superdurable clear, and “race prep masking’
Front & Rear Steel braided brake line
R-50 Two-Stroke Pre-Mix
Chain guide and chain block
High Pressure Radiator Cap
Carb Vent hoses
Suspension rebuild and service
C-12 Fuel mixed with pump
RM125GarageBuild-Cudby-005 Simon Cudby RM125GarageBuild-Cudby-006 Simon Cudby RM125GarageBuild-Cudby-001 Simon Cudby RM125GarageBuild-Cudby-002 Simon Cudby RM125GarageBuild-Cudby-003 Simon Cudby RM125GarageBuild-Cudby-007 Simon Cudby RM125GarageBuild-Cudby-010 Simon Cudby RM125GarageBuild-Cudby-009 Simon Cudby RM125GarageBuild-Cudby-008 Simon Cudby RM125GarageBuild-Cudby-011 Simon Cudby RM125GarageBuild-Cudby-013 Simon Cudby RM125GarageBuild-Cudby-014 Simon Cudby RM125GarageBuild-Cudby-016 Simon Cudby RM125GarageBuild-Cudby-015 Simon Cudby RM125GarageBuild-Cudby-012 Simon Cudby RM125GarageBuild-Cudby-004 Simon Cudby