Ppgnovice Posted July 27, 2013 Share Posted July 27, 2013 I hold my hands up. I have no mechanical knowledge or ability and am attempting to do the gasket mod on my Thor 200. Before I throw it away can anyone advise me how to get the piston back into the cylinder? Seems to be stuck on the piston rings. ....and yes I am an idiot for buying a Volution Thor. Quote Link to comment Share on other sites More sharing options...
Trickyh Posted July 27, 2013 Share Posted July 27, 2013 Is it wedged? If not then pull the clylinder back up very carefully. You should be able to compress the rings carefully with your fingers and slide the cylinder down over the piston and rings.. If it keeps getting stuck then some neat 2-stroke oil on the rings and bore will help let it slide When you tighten the cylinder head bolts up you must torque them to the new nM settings in the latest manual Its available on the Polini site as the Polini 130 / 200 manual. If you havent got a mini torque wrench the beg/borrow/steal one If you can, get the motor pressure tested for leaks. If you have used the 'official' metal base gasket it can be a weak area for air leaks and this could cause a lean run and a holed piston. HTH! Rich P.S Or send it back to Parajet!! Quote Link to comment Share on other sites More sharing options...
Ppgnovice Posted July 27, 2013 Author Share Posted July 27, 2013 Rich, Many thanks for the advice. Just managed to get the piston back in, now just to try and put the rest back together. I will look into pressure test, that doesn't sound like a good mod if its now a weak point for leaks. Thanks again. Quote Link to comment Share on other sites More sharing options...
bholleran Posted July 28, 2013 Share Posted July 28, 2013 If I were changing the gasket, I would add a little instant gasket or similar to make SURE it sealed. I don't have the polini can any one else confirm if there is a reason not to so this? Quote Link to comment Share on other sites More sharing options...
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