water in tranny oil and coolant shoots out overflow

[I like lilbikes]

ok I just got this bike a week ago, the bike is a 1990 kx80 (pretty sure) bored to a 115 (or so he said, can you bore them that far? it feels like its got 115) anyway it shoots its coolant out the overflow vent (by the rad cap) with what I would guess to be 1-2 psi . It did that since I got it. but just recently (today) my tranny started filling up with water and I havent drove thru water. Sooo Its related i think what gasket/ seal woulkd cause this. I dont have water coming out of my exuast so its not head gasket. it needs a topend rebuild so im thinking of pulling the engine and tearing it aaalllllll down. but the shooting water (yes it shoots) is wierd to me, it only does it at high rpm about the time you hit the power.... any ideas?

[I like lilbikes]

also I need to know what yearI have. I have frame VIN # of JKAKXWE11DA004030 and engine VIN of KX080F (or E) E004078 and whats the difference between the regular kx80 and the big wheel version, Is the big wheel a fullsize bike?

I removed the engine today and started tearing it down trying to order the parts but my old place was bikebandit.com they used to be cheap but I was there today and they want $100 for a piston do any of you know a good cheap online store? im searching now but I have dialup and all the places I have seen suck...badly

[I like lilbikes]

meh.. I figured it out myself. New topend gaskets new waterpump seal and new rings should do it I think...