GPZ 500 - starter chain spins on cogs
First may I say I don't know for sure your bike model that well (In- line 4 cylinder or water cooled twin?) BUT I am very experienced with motorcycles ( I am a qualified motorcycle mechanic & have owned GPZ 550, Z650, ZIR-II ).
For starters Kwasaki have used two different methods of delivering drive from the starter motor to the engine. Gear driven & chain driven. The chain driven type ( like GPZ 900 R ) were equiped with a tensioner. If yours has a tensioner be sure to change it with a new one also.
Both of the styles of drives ( chain & gear ) incorporate what is called a starter clutch mechanism.
This is what allows drive from the starter motor to be applied only when the starter motor is activated & free wheel when the engine runs. It is a one way clutch mechanism.
I am explaining this because a verry common fault on all electric start bikes is the starter clutch. ( except Moto-Guzzi, BMW, Harley which use a car style starter with a sliding pinion ).
When the starter clutch is faulty it displays a very distinct symptom.
When the starter motor is activated, you will hear a "whizz" followed by a crunching noise rather reminicent of a chain jumping teeth on a sprocket.
If this is the case with your bike & is what is what led you to change the chain, plus is what your continueing problem is, I would suggest you check the starter clutch.
The starter clutch comprises of a drive gear(the one that the chian, or startor motor output shaft drives), 3 rollers, three springs with guide pins, & the housing plate for the rollers & springs with guides.
To effectivly repair a starter clutch it is necessary to replace the gear, the 3 rollers, the 3 springs, sometimes the housing plate if it is also worn (from the rollers moveing)
I am hopefull this may shed some light as to the cause of your problem.
If not please post a comment & I'll try to help you further.
Regards Andrew porrelli
Jan 13, 2010 |
1993 kawasaki GPZ 500 S - GPX 500 R