I think i blew it up

[dcohen]

well, i have a '98 blaster and it has always been my old faithful atv, i learned to ride on it and i have been giving it hell for 10 years now with no problems

but today my buddy was riding it and it mad a funny noise and cut off, when i started it back up it sounded like it was about to fly into pieces

it had plenty of oil in the tank so unless the auto-mixer went bad i dont think that it was an oil related problem

the engine still turns over but it doesnt feel right

ive never rebuilt an atv engine but i have rebuilt tractor engines and car engines so im pretty sure i can handle it if i have to

what do you guys think happened?

 

[Jabes]

ur piston might have blew up... wow 10 years without a rebuild? did you ride it alot?

 

[bigdblaster]

ur due for a rebuild lol 10yrs thats along time man ur lucky i guess

 

[hickskateboarder]

pull the jug. i hope ur piston didn't fly apart cause splittin the cases sucks. never done it on a blaster but my buddy bought a yz250 that came in 3 boxes. no 2 parts were together so we are working on gettin it together. case halves are together now tho so i think we are past the most difficult stage.

 

[Jabes]

threads merged

 

[dcohen]

thanks for fixin all the threads, i wasnt sure where to post

but yea, i rode the hell out of my blaster, we used to go up to west virginia to ride a lot and we would ride almost 100 miles some weekends

i dont think the piston came apart because it would still run and im pretty sure it wouldnt run if the piston was in pieces, unless maybe the skirt broke off

 

[dcohen]

ok, after reading some other threads i have learned that there is only supposed to be .69 quarts of oil in the crankase

last time i changed it i put in a full quart (cause the girl workin at the yamaha place told me thats how much it held)

could that have anything to do with my problem?

 

[Jabes]

are you able to do a compression test cuz it should be above 100psi

 

[dcohen]

ill dont have a compression guage so i will have to borrow one from my grandpaw

ill let yall know what i find