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Try a Suzuki! Slightly more seriously, make sure that the gasget is well annealed, and that the surface of the head / block is FLAT and not polished. A flycutter usually used to machine the surfaces leaves a 'machining' pattern on the surfaces. This 'bites' into the gasket and holds it into position. Make sure that the surfaces are fully degreased, and then use a SMALL (I mean very small smear!) smear of silicone gasket sealer (very thinly!) around all the bore edges, and oilways. This stops the capilliary effect that actually makes the oil penetrate under the gasket, which allows the gasket to blow out of position. Try to get stronger studs as they probably lift / stretch under boost. John Williamson ----- Original Message ----- From: Joe Allan <beak@seaside.net> To: <turbobike@natvideo.com> Sent: 20 May 1999 06:13 Subject: [turbobike] Re: SOHC Honda headgasket problem > Hello All; > Just came back from trying out my supercharged 750 Hondamatic dirt > dragger, goes good but after the 10th run down the track the copper head > gasket blew :-( Pulling it apart tomorrow....any hints?? > Stock studs only allow 16 pounds torque. > Joe Allan > Vancouver Island > Canada > >