rev_80_brothers

I recently bought a Gasser 125 Pro. I have replaced the piston, rings and little end as it was a little noisy. The starting remains poor. When it's cold, no problem at all, but when hot it can be a dog to start. Strangely, adding choke when hot cures the problem. I've tried adjusting the air screw, whch made no difference at all. I haven't stripped the carb yet, or changed the plug, but I do wonder if: 1. This is a common 125 problem, and 2. Whether a larger pilot jet will help to richen it a little on the bottom. Any thoughts, advise or comments on similar experience welcome! Thanks

I have just bought my eldest son a 2007 Rev 80, and by my standards the top end is noisy. I bought a second 2003 Rev 80 for my youngest which is positively silent by comparison! A couple of questions: 1. Are there differing piston sizes/tolerances (like MX bikes), or is there just the one size? If there are various sizes, how do I know which to buy? Is there a mark on the cylinder anywhere? 2. Are the base gaskets of differing thicknesses (like KTM/Yamaha) and if so, how do you know which one to buy? 3. Where can I get a workshop manual (or even better download)? I used to compete in Enduro on KTMs and they were very straightforward. The trials bike rebuilding is slightly new to me! Thanks