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KZ750 camshaft problem
- biwithse7en
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I just installed back the camshaft. I did everything according to the manual. The piston is at TDC, the exhaust and inlet camshaft are at the right pins. The tensioner was put back before running the engine. Valve clearances are good.
However, the cam chain didn't run smoothly. It was kind of rattling. I filmed a short clip to demonstrate the symptom.
Any suggestion is welcome. Thank you.
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- 650ed
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1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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- biwithse7en
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- retterath
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- Scirocco
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If not you will over tension the cam chain and and all other components.
After a cam install never turn the the engine with the starter motor.
Remove the spark plugs and turn the engine by hand to get save not to bent a valve if the timing is out of spec.
My 1975 Z 1 B 900 Project
www.kzrider.com/forum/11-projects/605133...ears-deep-sleep-mode
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- JR
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Loosen the tensioner if it's a manual one. Remove it if it's the original tensioner. Put the cam cover on. As Ed said there should be a rubber block in the centre of the cover which depresses the cam chain between the sprockets. Remove the timing cover and set the crank to the T 1-4 mark. Install the cam chain tensioner and set it. All should be well.
What you are seeing is exactly what would be expected with cover off and tensioner in place
1980 kz750E1, Delkevic exhaust
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- zukdave
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Now before you do put the cover on recheck the cam timing.
1980 KZ650 F1
ZX750A1 motor.
Wiseco 810cc kit.
Zukiworks racing ported head.
VM 29 smooth bore's.
Dyna 2000 Ign. w/Dyna mini coil's
APE cylinder stud's and nut's.
APE valve spring's.
APE Track King clutch.
V/H KZ1000 sidewinder.
3.5x18 laced to a KZ1000 disk hub.
150/60/18 Shinko 006 Podium.
63" wheel base.
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- WABBMW
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Hope I am totally wrong. Re-check the timing again to start with. Then loosen the chain tensioner; install the valve cover; re-install the tensioner and try again. Good luck.
Bill Baker
Houston, Texas
1982 KZ650 CSR
2008 Yamaha FZ1
2006 Yamaha FZ1
1977 Honda Supersport 750 four (sold)
1984 Honda Nighthawk 650 (sold)
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- Daftrusty
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biwithse7en wrote: It makes the same noise when i put the cover back. And because I didn't have the pick-up coil cover on, I can see that the crankshaft bolt have like a rapid stop and did't have a smooth revolution. Thank you.
By the way you describe that the crank was suddenly stopping and wasn't smoothy rotating, that to me means that your started clutch is slipping. The sound you hear is the starter clutch rollers chattering as they try to lock up and turn the motor.
Since the clutch rollers loose grip the engine stops turning over creating that stuttering rotation of the cams.
Turning the engine by hand will let you know if the cam chain is indeed slipping off the crankshaft. (very very unlikely)
So if turning by hand you can't replicate the slipping, your starter clutch is to blame.
1990 zr550
kz750e
650/750 6-speed Transmission Swap
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