low compression

nate_lohs · Post by **nate_lohs** » Tue Sep 12, 2006 11:44 pm

i think i might have the iowa exhaust on mine, but its not restricted. here are a few pics...

as you can see theres no expansion chamber right before the muffler and the pipe diamete is pretty small. what do you guys think?

hrnytrtlsgsxr · Post by **hrnytrtlsgsxr** » Wed Sep 13, 2006 6:44 am

if you still think it is carbonized in the muffler use oven cleaner over night. use about two cans I believe.

hrnytrtlsgsxr · Post by **hrnytrtlsgsxr** » Wed Sep 13, 2006 6:49 am

the ticking is probably piston slap from the over usage of the piston. Also if there is scratches in the bore it creates blow by hence the hot spots on your cylinder and your piston.Get a new cylinder and piston.Those scratches will keep creating blow by and hot spots on you cylinder and piston

nate_lohs · Post by **nate_lohs** » Wed Sep 13, 2006 7:46 am

the ticking is gone now. im pretty sure it was from the carbon build up. a new piston and cylinder is too much money for a 20 year old scooter. after i honed the cylinder i didnt really see any scratches in it . as long as it runs well im happy, somethin this cheap doesnt have to be perfect. the main thing im concerned with now is figuring out if i have an iowa exhaust what to do with it, or just replacing it.

reckless504 · Post by **reckless504** » Wed Sep 13, 2006 10:08 pm

okay... i know EXACTLY WHAT HAPPEND the same thing happend to me. your jug is shot like mine was because your jug broke off a piece of your piston ring and thats the clicking. mine did the same thing. i ripped the motor apart and soaked the internals in gasoline and got the debirs out and bought a new piston because the other one was scarrd and i got another jug and some rings and gaskets and it runs golden.

nate_lohs · Post by **nate_lohs** » Wed Sep 13, 2006 10:13 pm

ok im not sure if you guys are only readin my first post or what, but theres no ticking. the rings were completely intact when i took it apart. it is back together and running fine. concern is no longer with cylinder, piston, or ticking. my concern is my exhaust.

reckless504 · Post by **reckless504** » Wed Sep 13, 2006 10:13 pm

and also to let you know your compression brakes in. it will get about 5-10 lbs. higher after you brake in new rings and gaskets. right now i have 145 lbs. of compression

nate_lohs · Post by **nate_lohs** » Wed Sep 13, 2006 10:14 pm

i had 130 psi of compression like a half hour after i replaced the rings so itll go up a little then. thats cool

speedyspree · Post by **speedyspree** » Wed Sep 13, 2006 10:56 pm

ive gotta try the oven cleaner thing does it really work and how do i do it

hrnytrtlsgsxr · Post by **hrnytrtlsgsxr** » Wed Sep 13, 2006 11:19 pm

nate_lohs wrote:the ticking is gone now. im pretty sure it was from the carbon build up. a new piston and cylinder is too much money for a 20 year old scooter. after i honed the cylinder i didnt really see any scratches in it . as long as it runs well im happy, somethin this cheap doesnt have to be perfect. the main thing im concerned with now is figuring out if i have an iowa exhaust what to do with it, or just replacing it.

carbon build is caused by overjetting.. The way your piton and jug looked definitely looked rich.

roadcapDen · Post by **roadcapDen** » Thu Sep 14, 2006 8:26 am

After your BBQ put the exhaust on it and burn the crud out, works for me.

speedyspree · Post by **speedyspree** » Thu Sep 14, 2006 8:58 pm

ok my weekend project