Unofficial Royal Enfield Community Forum
Royal Enfield Motorcycles => Bullet Iron Barrel => Topic started by: petross on November 11, 2007, 06:07:21 pm
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I've been eyeballing that high compression piston. is there anything else I should do with the engine, or does the stock head and valves accept that piston?? I know thqt in a lot of cases like this, one cannot just slap parts on and go without tweaking a few other things.
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I'm pretty sure that the high comp piston is plug and play, but it is always a good idea to check to see if the valves clear the piston crown when going up in compression. For even more comp use the thin head gasket.......Dew.
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Right on, thanx. I was also thinking about laping the mating surfaces on the head and jug and doing away with a head gasket.................but thats taking it too far I think. :D
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You will probably want to use a head gasket. You don't want the compression so high that you can't run pump gas. I've got 10.5:1 pistons in both an old ironhead sporty and a 1978 SR500 single Yamaha. Both are pretty noisy without octane booster, even with high test gas.....Dew.