7 Machine
Home / Kawasaki

primary clutch problem

Disme2010-08-12 18:40:03 +0000 #1
For the last two weeks I've been tring to fix my son's 08 BF 650 with no luck. The problem with it is that at an idle, in geer it wants to creep ahead at about 5kph. I have cleened the clutches, changed the belt, and even added a shim to the secondary clutch to increase the deflection, all with no luck. The belt is a new Kawasaki belt fron the dealer and is the correct one. The idle is quite low and should be higher, and for shims I have 2 of the wide ones and 2 of the thin ones. stock is one of each. I also have a new epi red spring and epi weights in the primary clutch, the new spring is because of tring to fix this problem. Any help or sugestions would be great, thanks all.
nmkawierider2010-08-12 18:48:33 +0000 #2
Well, what is the exact deflection? It has to be between 22 and 27mms. Any less then 22 and it will creap and squeal. Also, if the spindle is groved from being too tight in the past, nothing will fix that except a new one.

One other thing, if the engine brake isn't retracting, the sheave will stay against the belt and that will make it creap too. Here is video of mine with the cover off looking for a noise. It actualy had too much deflection (29mms) and was adjusted. But it shows how far the sheave had to move to make contact with the belt.

BF Clutch Vid: www.vholdr.com/node/82976
Disme2010-08-12 19:16:33 +0000 #3
Just came in from measuring the deflection, it is 31-32mm with all 4 shims in. Running it with the cover off the clutch appears to be opening all the way and working properly.
wood butcher2010-08-12 19:02:58 +0000 #4
i would remove the KEBC and just leave it pluged in and see if it works when u turn the key on



Other posts in this category