diligaf Posted August 19, 2009 Report Share Posted August 19, 2009 I want to decrease the compression on a 280 pro. The stock is 0,8 what is a good gasket thickness to use and can you combine 2 gaskets?? I'm trying to tame the 280 Quote Link to comment Share on other sites More sharing options...
crasher Posted August 19, 2009 Report Share Posted August 19, 2009 hi mate, i've got a head spacer on my 250 pro, which lowers the compression without altering the port timing, which apparently happens if you go the base gasket route, head spacer is about Quote Link to comment Share on other sites More sharing options...
diligaf Posted August 19, 2009 Author Report Share Posted August 19, 2009 No weight yet, just looking at options, The 280 can be a little fiesty, I'm considering what to do. The gaskets are real cheap and easy to fit so thats my first choice. Quote Link to comment Share on other sites More sharing options...
laser1 Posted August 19, 2009 Report Share Posted August 19, 2009 Head Spacer is the best value. Cheap and bike still runs good. Easier to KS and saves money on lower octane gas as well. FWW is OK - but too pricey IMO Base Gasket cheap, but as previous poster said, will change port timing. I havent tried it though - let us know if you do. Quote Link to comment Share on other sites More sharing options...
husky Posted August 19, 2009 Report Share Posted August 19, 2009 Tried thicker base gasket on a 300,ruined the top end and had a minimal effect low down,so I don't advise it.I would fit a flywheel wieght and/or a slow action throttle.It's more expensive but runs/rides much better,I think these engines are very sensitive to different port timing.Never tried a cylinder head spacer,but I know some who have had head sealing problems Quote Link to comment Share on other sites More sharing options...
laser1 Posted August 19, 2009 Report Share Posted August 19, 2009 Jim snell (risingsun) has a video on how to correctly install the orings on the head spacer - if followed - no problems. Know of several w/o problems. Quote Link to comment Share on other sites More sharing options...
crasher Posted August 20, 2009 Report Share Posted August 20, 2009 i've put head spacers on 2 gassers and not had any sealing problems, i put a bit of silicone grease in the o ring slot to hold them in place when putting the head back on,maybe this was the problem the other guys have had? Quote Link to comment Share on other sites More sharing options...
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