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Hi I want to fit a Heiden Tuning crank ignition system on a client's engine, because there bearing part of his camshaft is worn and is leaking oil profusely, despite brand new seals. As getting a new cam is a no no and in a chop frame it's an engine out job to even try another second hand...

I am working on a chaps XS650 engined ('75) chopper. It has an unholy oil leak from the end of the camshaft, behind the Boyer ignition pick ups. On closer examination I think that there is excessive wear on the cam shaft where the oil seal lips meet. When looking to see if I could find a new...

Earlier this year I rebuilt an XS650 motor for a customer that had undergone a whole heap of unkindness in it's long life. I replaced all the oil seals, gaskets, 'o' rings etc with new and all gaskets were seals with Wellseal It's now out to fourth oversize and pulls really well with bags o...

Is there more than type of piston used on the XS650 ? I'm rebuilding a very tired XS650 lump. I bought a pair of +1.00mm pistons and had the tired old barrels re bored to fit. Imagine how VPO I felt when, having fitted the barrels, I wound the crank round to TDC and the top rings popped out...

The gear selector drum of this engine I'm trying to build, has knackered bearings ... in a big way. The needle roller at the back came out in about fifty million pieces. I have found a part number, but the UK suppliers come up with a blank. I can easily measure the inside and outside diameters...

Hi as I mentioned in an earlier thread, I am restoring an XS650 engine that has been the victim of some serious abuse. There are a number of holes in the top crankcase that look as if they have been filled with an epoxy putty and I'm wondering if they should have been. I have taken a few pix...

Hi I am new to both this forum and XS650s. It's one of those bikes I've always liked but never owned ... and sadly still don't :( I do however have the entertaining job of restoring an engine for one. I am a serial fettler and a bit of a Big Zed expert. The engine came to me from someone...