Jump to content
Sign in to follow this  

Good Compression????

Recommended Posts

My 1982 kx80 has 100psi of compression is that good? i did a top end re build last year because it ha 65psi of compression but now its not running as good as it was after the re build

Share this post


Link to post
Share on other sites

Piston is backwards dude the ported pistons need holes faceing the carb there should be an arrow on piston face it towards ex

Share this post


Link to post
Share on other sites

i thought the 3 holes are there to lube the exhaust bridge are you sure

Share this post


Link to post
Share on other sites

little holes point to the exhaust to lube the bridge you are right..... the other guy is wrong the big holes go on the carb side.

Share this post


Link to post
Share on other sites

82 is aircooled i think so just pull it apart and see what you see. Measure ring-end gap. Put it together and check the squish. 100psi sounds a bit low but depending on tons of things that could have gone on since '82, that could be fine as you did go from 65 to 100 with a rebuild.

Share this post


Link to post
Share on other sites

OK for a minit there i was worried that i put the piston in wrong but i got the bike running good it turned out to be a clogged main jet that was causing the loss in performance i rebuilt the whole carburetor and its running good as new

Thanks for the help guys

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:

Sign in to follow this  

×
×
  • Create New...