today i was riding and i wasin fourth gear and then it just died and started to roll, tryed to pop start it while it was rolling and all it did was keep turning over, i have a high compression head, there is oil in it and everything else is good, if i try to start it i can hold the start and it will just keep turning over but seems like it lost compression because i can also push it while in gear and it has some but notmuch compression? i just need some suggestions, can it be a blown seal? rings or whole top end?

 

Have you done a comprssion test? If it's lost compression, it's time to dig into the topend. Are you shure when you are pushing it the piston is pumping? If not you may have broke the crank or a gear.

 

you also want to check spark,wiring conections,carb&fuel...etc

 

yea ican feel it on the head pumping and air will come out of exhaust when pressing electric start, when i push it in gear it still has compression but not as much as it should, and it you can just hear the electric start going fast with not much compression, if the valves went would it lose compression

 

mabey it skipped timing? check your cam timing, valve clearences, and get a REAL compression test, and if possible a cylinder leakdown test.

 

i know it lost most compression because i can push it pretty easily in gear, it has compression but barley any to what it should have, if the valves went would it make it lose compression and not start?, if the rings went would it lose all compression and not start? or what else can it be, basically before it happened everything was perfect, it ran strong, went fast and then was down shifting then it just stalled, and wouldn't start its nothing electrical its just something made it lose compression and it wont fire up

 

Either valves,rings,or headgasket. Or you blew a hole in the top of your piston...but thats not so common, unless you were riding at WOT and it was running lean.

 

most likely rings are toast or headgasket pewped, would be rare for something to happen in the vavletrain without a noise, rings are usually silent when they give out

 

yes i would agree with rings or head gasket. so tear her down, you know you want to trick it out more. and we find when we tear our engines apart it's an excuse to go back back together with better, faster, parts...lol.