August 19, 200917 yr 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
August 19, 200917 yr 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
August 19, 200917 yr Author 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.
August 19, 200917 yr 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.
August 19, 200917 yr 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
August 19, 200917 yr 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.
August 20, 200917 yr 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?
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