So I've had my '02 yz125 for a couple of years now, and recently thought it was time for a change, so I bought an '02 yz426f(can't believe they were from the same year). I was almost ready to sell the 125, to pay off the 426 when I discovered a few problems with 426. The gas tank started leaking, the thing refused to start when warm, then eventually while riding down the road the bike died and the kickstart locked up aswell as the wheel(most likely the timing chain skipped, leaving the exhaust valve jammed closed). Also the fmf powercore 4 snapped right in half as the mount came off. Now I'm wondering if I should keep the 125 and turn it into a race bike with many aftermarket parts and sell the 426 as I don't want to encounter similar issues later on, or sell the 125 and fix the 426. I'm always eager to be able to ride whenever. I also enjoy the decompression as I like to keep older bikes more stock, but if I do end up keeping it I might aswell get a hotcam. Any thoughts on what I should do or how to fix these issues?