Have stripped the engine down to have a look at the carb etc, the seal on the carb has split and the front bearing has play in it, the needles were not the cleanest either, think any one of these problems may be giving me tuning problems, there is slight wear on the conrod as well, I will be replacing the conrod, bearings and seals prior to rebuilding the engine to ensure I start tuning in a good position. Question - do you think the play in the front bearing has caused me problems with my clutch bearings? I use the answer rc bearings and they last about 25 mins running before collapsing?