Chain guide adjustment

njn

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Mar 14, 2018
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#1
As you can see the chainguide is not adjusted properly. The chain is riding on the guide higher gears. I was able to loosen the upper bold and slide the guide back, which helped, but did not solve the problem. Has anyone been able to loosen the ISCG bolts?


18metapwrgr_3_2000-jpg.69
 

njn

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#2
Thanks for the reply. That is the stock picture from Commencal's website. Mine has the same issue. Since Commencal tilts the motor forward in the frame, the factory chain guide it slightly out of position. It seem Shimano over tightened the isg bolts. I do not want to strip these.

I believe special tools are required to remove the spider.
 

Gary

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#3
You're unlikely to strip the ISCG bolts losening them. If they are really tight there's more chance of rounding the hex of the bolts so just make sure to use a decent quality allen key that isn't loose in the hex of the bolts and that you can get decent leverage on the key.
The ISCG bolts look easily accessible through the space between the spider/chainring by rotating crank position.
 

njn

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#4
They are accessible and I have a nice set of Wiha keys. Still seem like they will round.
 

Kernow

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#5
Same issue with mine , the bolts will undo with a crack , they are threadlocked , do need a decent Allen key , but wiha should be fine . Don’t use a ball end
the adjustment on the top bolt is most of your problem there , on mine its set almost all the way back Yours is too far forward and it will move lower as it slides back . Set the chain on the smallest rear cog and it should be almost touching the lower part of the guide . I think there is a set up diagram in the book
Hard to believe commencal actually used that as a pic in their website , you can see its lifting the chain . I never noticed it when looking at the pics every day before my bike arrived ?
 

njn

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#6
The wiha keys flexed, so I got some bits which worked great.
 

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