Kawasaki Motorcycle Forums banner

1985 ZR400B1(Z400F) engine rattle at idle speed

3437 Views 7 Replies 3 Participants Last post by  kyhick1
Bought the above and have done it up(rebuild without removing the engine). Now that it is going again, it has a very clattering, uneven engine rattle at low idle. Above 2000 there is nothing. Timing chain tensioner is on its limit, but there is still tension in the spring. 28000 miles on the clock, and, by the state of the bolt heads, nobody has ever touched it. Any ideas???? Listening with my trusty screwdriver pressed to ear, it seems to be coming from the lower gearbox. Primary chain???
1 - 2 of 8 Posts

Mack (my husband) had the same problem on his KZ550A.....He bought a chain tensioner kit from our bike shop for about $20.00 and it fixed the problem.....


Nice looking bikes...... you have more patience than I do. :D That is why Mack does most of the mechanicin' in this household. :lol:

here is a picture of our 550A

1 - 2 of 8 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.