- Posts: 10
- Thank you received: 0
Loud Rattling Coming from gearbox
- Chris_Z1100
- Topic Author
- Offline
- User
I've been stuffing around with my 82 z1100 a2 (shaft drive) for a while and i've just started riding on the road again. I've noticed a pretty bad rattling sound coming from the bottom of the engine/gearbox that only occurs at idle. I have little to no experience with shaft drives so i'm not sure at all what's going on in there.
Just wondering if anyone had any ideas what it is before i start tearing it down?
Cheers,
PS i'm new and am trying to add a signiture but it's not letting me save edits on my profile
Please Log in or Create an account to join the conversation.
- 650ed
- Offline
- User
- Posts: 15344
- Thank you received: 2829
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
Please Log in or Create an account to join the conversation.
- Chris_Z1100
- Topic Author
- Offline
- User
- Posts: 10
- Thank you received: 0
Cheers,
chris
'82 Z1100 A2
Please Log in or Create an account to join the conversation.
- Patton
- Offline
- KZr Legend
- Posts: 18640
- Thank you received: 2098
Is there combustion on all four cylinders?
Can spray water mist onto exhaust headers shortly after starting cold engine to determine which cylinders are combusting (water vaporizes and sizzles off) and which aren't (water runs down the exhaust pipe).
Good Fortune!
1973 Z1
KZ900 LTD
Please Log in or Create an account to join the conversation.
- Bozo
- Offline
- Sustaining Member
- Ride it like u stole it
- Posts: 592
- Thank you received: 105
+1, carby tune to start with (after checking compressions)Patton wrote: Before disassembling anything, would first perform a complete tune-up, including carb sync, then set the idle rpm at 1200.
Is there combustion on all four cylinders?
Can spray water mist onto exhaust headers shortly after starting cold engine to determine which cylinders are combusting (water vaporizes and sizzles off) and which aren't (water runs down the exhaust pipe).
Good Fortune!
First Permanent ride the Z1R since Dec1977 (220,000km) as of June 2015
Second permanent bike 1989 FJ1200 dyno'd 140RWH, great bike.
Third ride is now the Frankenstein 1981 GPZ1100B1, 1983 fully recon motor fitted LOVE THIS BIKE
Forth my work bike FJ1200 1989 (same type as FJ above)
Please Log in or Create an account to join the conversation.
- baldy110
- Offline
- User
- Posts: 2272
- Thank you received: 512
Please Log in or Create an account to join the conversation.
- Chris_Z1100
- Topic Author
- Offline
- User
- Posts: 10
- Thank you received: 0
Cheers for the advice, i'll get the carbs synced and set idle and i'll let you guys know how it went.
Thanks!!
'82 Z 1100 A2
Please Log in or Create an account to join the conversation.
- daveo
- Offline
- Premium Member
- Posts: 2803
- Thank you received: 655
Before discovering the culprit, I thought sure something was loose behind the transmission cover.
Somehow my attention arrived at the generator cover. When lightly placing my hand on the cover, I literally felt something wasn't right behind it, with engine idling and the bike on the center-stand. If you try this, do it while the motor is warming up, because that cover becomes very-hot.
This may not be the problem you are having, but it could be.
See: www.kzrider.com/forum/2-engine/540846-oh-brother#540846http://
Good luck...
1982 KZ1100-A2
Please Log in or Create an account to join the conversation.
- Chris_Z1100
- Topic Author
- Offline
- User
- Posts: 10
- Thank you received: 0
Please Log in or Create an account to join the conversation.
- LarryC
- Offline
- User
Larry C.
Please Log in or Create an account to join the conversation.
- koolaid_kid
- Offline
- User
- Posts: 783
- Thank you received: 99
I also suggest that you check your valve clearances prior to the carb synch, as this will affect the synch process.
1983 GPz 750
810 Wiseco, Kerker, K&N, DynoJet S3, Accel, Progressive, etc.
Please Log in or Create an account to join the conversation.
- daveo
- Offline
- Premium Member
- Posts: 2803
- Thank you received: 655
Chris_Z1100 wrote: Thanks Daveo! felt a bit of a rattle through the alternator cover. Took it off and one of the magnets has cracked. Not sure how though... Would the broken magnet be all that is rattling? It seems pretty small to be making so much noise.
See: www.kzrider.com/forum/2-engine/540846-oh-brother#540846http://
If the magnet piece is loose, it is possible. Post a close-up picture of the broken magnet if you can.
This is likely where the magnet fragments have gone. Pic taken 9/05/10
1982 KZ1100-A2
Please Log in or Create an account to join the conversation.