Nothing works. Stripped down again, new seals, new bearing, run-in by three five minute warm-ups with cool down between, then gently run for 15 minute session, and cooled again. Then on track again using properly and started to get tight after 10 minutes, and on looking again the flywheel was too hot to touch, so end of play again. I have a flywheel weight fitted, and because its a thread on type it doesn't appear to run true, although upon removing the weight the actual flywheel and end of c/shaft appear true. If the bearing housing in the crankcase was out of true could this be the problem ? Any ideas or suggestions most gratefully received, as I'm almost at the stage of ordering new left crankcase and crank, and I really can't afford it. Thanks in advance for any ideas