overheating

[ImpulseRocket]

it's a 1 piece head and the spark plug was a brow colour when I took it out. could it be the the piston and cylinder were too tight as they seemed to have a very tight fit

If the piston wall clearance is too tight an engine can seize under normal operating conditions. It is plausible, but the only way to know would be to measure. An out of round cylinder can also cause tight spots and isn't unlikely given the level of quality most of these kits come with.

 

[Toby woodman]

yes when I looked at the piston the wear was only a patch on each side of the piston which would be expected if the piston or cylinder was out of round

 

[Toby woodman]

it would seize after just a few minutes

 

[Daytripper24699]

What kind of motor is it or where are you buying from? Also..,the two piece motors seem to run better for some odd reason.