89 yz250 backfires only

D

dmstafford79

Member

Jun 15, 2012

7

0

• Jun 23, 2012

• #1

1989 yz250... Kick it and kick it and wont start.. Has fuel compression and spark. About every third kick it backfires and blows the pipe off the cylinder.. Help please? :bang:

 

A

arnego2

Member

Mar 8, 2008

271

1

• Jun 23, 2012

• #2

Timing or the pipe is closed, when did you clean the pipe?

 

dales298

Mostly Useless

~SPONSOR~

Nov 25, 2003

310

0

• Jun 24, 2012

• #3

Check the flywheel key. The last time my bike did that it had a broken key.