SRS racing has the trickest cr125 stuff. A higher 1st gear, there pistons are the best racing piston available. There focus is on 4-st now. They once had heads with fins, there own pipe and silencer, ignition made by jd, reeds, plug wire, carbon fiber and factory mag. ignition,clutch covers, porting,etc. I ordered a bunch of stuff in 05, then the USA importer went out of buisness
. On the Italian site they only show 125 pistons, I,m sure they have the 1st gear yet. Jm racing in Texas helped SRS with there motor program, for racing the 125 gp,s. Jm racing built Ryan Dungee,s Rm125, Josh Grant,s cr125, Team Grean 125,s Tara Giegers 04 cr125 54mm bore with stroker crank that pulled holeshots all year, and my 04. The trick parts went away when the pro,s switched to 4-sts.