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McCulloch 797 pistons.
Posted: Mon Nov 22, 2010 5:17 pm
by mcbob
Well fellas i'm after some 797 standard pistons i have one but i need more as i'm building a boost ported SP125C for competition, no oversized pistons needed as the SP125c is chrome bored ............
McBob.
Re: McCulloch 797 pistons.
Posted: Mon Nov 22, 2010 8:37 pm
by Tom Smith
Mcbob, I'd try using a 1/2" pin std 101 piston and rod, finding 797 pistons (or early 101 large pin pistons ?) probably won't be easy. The 797, S797, SP125C, SP125, and Mc-101s are basically close cousins.
I've heard of adding additional drilled and tapped material shaped to fit into the large combustion chambers on the 123cc saws. It has to be worthwhile doing.
Re: McCulloch 797 pistons.
Posted: Mon Nov 22, 2010 8:53 pm
by mcbob
Well i has me a standard 797 piston and SP125C rings plus a new rod and good 101 crank here that do go all together the part no i'm after is 67089 dont need rings as i have plenty the reason behind the SP125c cylinder is stock appearance no kart engines obvious by the removable head .... i was after another gain in power over the SP125c this should put it close to a 101 the only disadvantage i have is the fixed head.
But i was thinking along the lines of a large compression bolt i could wind in to take up a little space.
McBob.