No I'm not positive I do think it could be a issue with the cooling system I'll try and test the thermostat tonight and yes I figured from one of your other posts but I still greatly appreciate the assistance lol

Well I did a fair bit to it tonight I tested the voltage when cold and hot and revving and it strayed around 15v so that's all good, I adjusted my valve clearences and that seemed a bit certianly made it easier to start so they must have been out. Flushed the coolant system and tested the thermostat in the kettle and it opened but I didn't have access to a thermometer so I suppose I'll have to test it again sometime, and did a compression test and got 90psi dry and 95psi with oil in the cylinder I have no idea what good compression is in a xx tho. Haven't had a chance to test it properly yet to see if it splutters as it's all in bits still but I'll test it tomorrow and let you know

M-quick here is the pics of the rear bumper

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I would slap that compression gauge on something else and check it. About 30-40lbs low...buy with only one cylinder it may be the gauge. My buddies is about 20psi low on his gauge. With a 2 cyl you can at least make sure it is balanced. That low though it is doubtful it is the gauge.

That is one heck of a custom race bike you have there! I think you may need an engine rebuild based on those psi values. Anything below 110 psi is usually not good.

Thanks bud I'm glad you appreciate it ahah and yeah at least I'm certain on that now so I guess I'll just have to let it sit till I save up enough to give it a rebuild im just worried if it has modded internals too now

Also I'm sure it's not the compression gauge that's messing up cos I was reading 100+ on a 250 farm quad lol

Bummer on the motor. Did sound like that was probably the case. Conveniently it is a single cylinder and looks pretty easy to do!