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ShearedCrank
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Primary Chain tension
#813540 06/22/20 11:01 am
Joined: Jan 2014
Posts: 590
BigBars Offline OP
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Hi Folks,

The manual states "The correct chain adjustment is 1/2- in (12 mm) free movement."

Is that 12 mm, just pulled in one direction from rest , or "total free movement" as in pushed up and down from rest.

Thought a search would throw this out immediately but after 5 pages I got lazy ;-)

thanks

BMF


3D TV: A format that lost a format war without even having an opponent.
Bikes: '69 T120 on average (1967 rolling frame and 1971 Bonnie engine) + '56 1/2 T110 on average (58 rolling frame - with 55 iron head engine) + 74 T150 Home model.
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Re: Primary Chain tension
BigBars #813542 06/22/20 11:50 am
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Put tension on the kickstarter and feel the tension. I always tended to have my primary chain just slightly on the loose side, if you tension it tighter it just wears out quicker. But I have a belt these days.

Re: Primary Chain tension
BigBars #813556 06/22/20 2:08 pm
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Total movement. I am not a robot.

Re: Primary Chain tension
BigBars #813560 06/22/20 2:31 pm
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You need to rotate the chain around and find the tightest spot then adjust it there using the kicklever to load the bottom of the run.
Haynes gives 3/8" for post '71 and 1/2" for early Tridents. The early R3 manual gives 3/16". I adjust it so the edge of the side plate comes up to the centre of the pins when lifted at its tightest point.
Renold Chain gives total movement for horizontal drives as C/50 for shock drives where C is the distance between shafts in millimeters which is 202mm for a triple. So 4mmm total movement.


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