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Too Tight Cam Chain
- BB
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I am finally making some progress on the rebuild. I got to the point of putting the cams back in today, when putting the inlet cam in (after the exhaust)the cam chain is super tight. I had to push hard to get the cam in and depress a valve, thought this would give me slack. Nope, I got it in, but when I say tight, I mean it - no slack what so ever. I checked the length of the new vs. old chain before installation, it is about a half link shortrd (I though due to 42000 miles of use), certainly not enough to make it this tight.
Going with a manual tensioner, which isn't installed, so not that. Any ideas? Photos below.
Cheers Guys,
Brendan.
Attachment IMG_07221.JPG not found
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1980 KZ1000P - The Mistress
2002 R1150GS - Matilda
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- 4TheKZ1000
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- Powerstroke_fan
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1980 kz1000B4 LTD- 1327cc 9-1 comp
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Psp-3x cams
RS 36s
Welded MK11 crank
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- LarryC
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BB wrote: Hi Guys,
I am finally making some progress on the rebuild. I got to the point of putting the cams back in today, when putting the inlet cam in (after the exhaust)the cam chain is super tight. I had to push hard to get the cam in and depress a valve, thought this would give me slack. Nope, I got it in, but when I say tight, I mean it - no slack what so ever. I checked the length of the new vs. old chain before installation, it is about a half link shortrd (I though due to 42000 miles of use), certainly not enough to make it this tight.
Going with a manual tensioner, which isn't installed, so not that. Any ideas? Photos below.
Cheers Guys,
Brendan.
Attachment IMG_07221.JPG not found
Attachment IMG_07231.JPG not found
Attachment IMG_07241.JPG not found
If those pics are with 1 & 4 at TDC, it's pretty easy to see your intake cam is late.
Larry C.
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- moneypit
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2-76 kz900
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- LarryC
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Attachment IMG_07231.JPG not found
Take the tensioner right out of the block when you install the cams.
1] The chain might not be on the crank sprocket correctly.
2] You are probably 1 pin off on the Intake cam's timing.
Don't include the pin that aligns with the exhaust index mark in your pin count. Start with the one above it as the first pin in the 28 pin count.
Larry C.
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- zed1015
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If it's not a miss match of crank/cam sprockets or wrong camchain in a mk2 then it can only be the camchain sitting to the side of the the teeth on the crank or bunched in the main bearing cap.
Rotate the engine slowly whilst pulling on the chain to release the bunched links.
This seems more probable as even with the chain not sitting on the crank teeth there is usually plenty of slack to get the cams in easily and that problem is usually only discovered when rotating the engine to double check the timing.
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- 4TheKZ1000
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zed1015 wrote: He stated that the tensioner is not installed so can't be that.
If it's not a miss match of crank/cam sprockets or wrong camchain in a mk2 then it can only be the camchain sitting to the side of the the teeth on the crank or bunched in the main bearing cap.
Rotate the engine slowly whilst pulling on the chain to release the bunched links.
This seems more probable as even with the chain not sitting on the crank teeth there is usually plenty of slack to get the cams in easily and that problem is usually only discovered when rotating the engine to double check the timing.
I was thinking the same about slack....that sucker is so tight....really strange.... ya.....????
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- zed1015
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Just needs half a turn of the crank whilst pulling up on the chain to release it.
AIR CORRECTOR JETS FOR VM CARBS AND ETHANOL RESISTANT VITON CHOKE PLUNGER SEAL REPLACMENT FOR ALL CLASSIC AND MODERN MOTORCYCLE CARBURETTORS
kzrider.com/forum/23-for-sale/611992-air-corrector-jets-
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- Jeff.Saunders
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- BB
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I will let you know.
Cheers and thanks,
1980 KZ1000P - The Mistress
2002 R1150GS - Matilda
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- APE Jay
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