85'250r w/coolant in cylinder

[Jeremyatc250r]

I bought a motor and I just got it on and I'm getting coolant in the cylinder.The motor is a LA SLEEVE 310.I tried to start it without coolant and it fired right up.I only let it run for a second just to make sure I had everything hooked up right.The next day I put water in it and it did start but shortly after started acting like it had a fouled plug.I took out the plug and it was covered in coolant.I changed the head gasket and that didn't work.I took a closer look and noticed that the cylinder hole is bigger than the head gasket hole.The piston is hitting the gasket.The gasket I originally took off was the same way.Could this be why there is coolant in the cylinder?How can I fix this problem?Any help would be great.Thanks,Jeremy

[smokinwrench]

I'm not familair with big bores, but maybe you need a special big bore head gasket from ESR or someother big bore company. Make sure both head and cylinder surfaces are straight.

[whiteman350x]

Sounds like you have the wrong gasket. Most gasket ccompanies offer a bigbore head gasket. You need to look into those.

[atc krazy]

yah look at the gasket hope u get it fixed

[84honda 200X]

I would call LA Sleeve and ask them what the problem is and if they know where you can get a gasket.

[markdb420]

get a cometic gasket set for 72 or 73 mm sleave. I get mine from http://www.totalperformance-llc.com/send.asp . I had the same problem with my motor until I found out that it had a big 300cc sleave.