Congrats on the rare find, I picked up a 06 cr125 for a practice bike recentlly. The mod. race bike is a 04 cr125, by JM racing from TX. Check him out he builds the fastest cr125,s in the country, he did Josh Grants cr125,s for L.L., helped SRS with there motor program when Texan Jeff Dement raced the GP,s on a cr125. Tara Gieger,s 04 cr125, I have 1 of here cylinders as a spare backup, she hole shot most races against 250f,s. Chad Johnson,s team grean KX125,250. And Ryan Dungy,s Rm125 that won the L.L. 125 b mod. title. TTRR the chasis is the best ever, fit feel, durablity is outstanding, the jetting is a little off, I changed the pilot jet, main jet,airscrew, but I,m using my 04 coil with an icat, the coil might be a little different.