dont know whats wrong

[hunt3rm008]

i rebuilt my topend a month ago and have only rode it for about an hour total so far because ive had so many problems with it. i sent my cylinders out to herr jugs racing and got them bored and honed with the piston kit. i put it all back together and it started right up but smoked A LOT. i thought it just had a bad head gasket so i ordered a new one and put it on, and it still smokes A LOT. i decided to check the compression and it did not go past 107PSI. i read that stock is usually 120-130 and anything with 110 or lower needs a rebuild. why is my compression so low? its freshly rebuilt. it starts up always on the 1-3rd kick. also my spark plugs were pretty wet when i checked them. the motor is completely stock besides being bored over to the next size. anyone know whats going on?

[camatv]

might have a case seal bad or crank seal shot. if it has a TON of oil in it the rings havent seated yet..

 

do a leak down test and go from there.

[hunt3rm008]

where are those seals located? and how much is a leak down tester? what would that check for? leaks throughout the whole engine?

[tsharktim]

I think there's a pinned link in how tos on leakdown testers. U can make your own for about 20 bucks. I used the link to make mine and its a invaluable tool to have for two strokes. 6psi for 6 min is the goal. The seals r on either end of the crank but there's no sense pulling ur clutch cover and flywheel before u know if you have a leak or not cuz u gotta split the cases to replace seals anyway. Do the leakdown first it can eliminate a lot.

[hoppedupandcutdown]

http://bansheehq.com/forums/index.php?showtopic=110585

how-to on building a tester.

Is it smoking coolant or oil?

What prompted you to do the topend in the first place?

sure your compression tester is accurate?

got a Clymers manual?

[vulvafan537240]

how did you break this motor in?

[hunt3rm008]

The reason I rebuilt the motor was because I

Bought it as a roller with the motor out and the motor had the top end pulled off. The kid just said it needed a new top end rebuild . Breakin it in I started it up and let it idle til warm and

Shut it off to cool and repeated that a few times then on the 5th time after warming up I rode it very slowly not giving it much gas for 10 mins then let it cool and repeated that process babyin it.

[hunt3rm008]

And I am not sure if it's burning oil or coolant. My coolant levels haven't gone down noticeably. How can I tell if it's oil burning ?

[sheerider11]

And I am not sure if it's burning oil or coolant. My coolant levels haven't gone down noticeably. How can I tell if it's oil burning ?

Break it in like it owes you money.

[hunt3rm008]

is it smoking alot because it isnt broken in yet?

[n2otoofast4u]

Ride the bitch like you stole it!

[vulvafan537240]

Did you check the compression when you put it together? Did you lose compression or was it at 107psi from the start?

Edited October 29, 2012 by volfan537240

[hunt3rm008]

i did not check the compression after the rebuild so i am not sure. should i just rip on it? i thought you had to baby it for the first few hours

[Jereme6655]

Wait wait wait. First.......when you did your compression test.......did you hold the throttle wide open and continue to kick until the compression stopped rising?

 

[hunt3rm008]

Yes I did