hello everyone, hope you can help. i have a 94 rm125 that wont shift into first gear, well actually it will go into first but when it does it locks up the rear wheel and stalls the bike. 2nd-6th gears work fine its only first gear. I put a new clutch cable on as well as took the clutch apart, all the plates looked fine but the basket had some deep grooves in it, so i thought that might be the prob. I filed the grooves out and tried it again but still the same problem. Thinking i might have to split the cases. Any ideas or help would be appreciated. thanks