Chain alignment

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Larry
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Re: Chain alignment

#16

Post by Larry » Mon Apr 16, 2018 2:17 pm

Run a string from the steering head down the middle of the backbone. When it gets to the rear, the axel mounts should be equidistant from the string. The factory allows +- 1/16. You can get away with +- 1/8. 1/4 is too much.



tomo256
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44 Model U

Re: Chain alignment

#17

Post by tomo256 » Mon Apr 16, 2018 8:24 pm

Larry. Thanks for the advice. I have removed the oil tank and rear fender and associated hardware, ready for a fresh start in the morning. I will report back as soon as I have had a good look and taken measurements
Martin

tomo256
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Re: Chain alignment

#18

Post by tomo256 » Thu Apr 19, 2018 10:14 pm

I haven't run a string to the back axle yet, but I did run a string down the back tube to the seat pogo downtube. I then laid down some tape and marked the centre. next I laid a straight edge along the tire and marked where the straight edge touched the frame adjacent to the centre mark that I laid down by the seat mount. Repeated on the other side of the tyre and shared the distance equally on both sides to get the wheel straight, as shown in the photographs. The photograph angles are slightly misleading if you look at the centre post along the centre line of the tyre. The result has really surprised me. It seems most of the problem was optical and me being a dumba$$. I should have removed the fender and used a straight edge. There is still a slight issue though the sprockets line up nicely but the front sprocket is slightly out of square, so a bit of aligning is still required but feasible. Thanks again for all the suggestions.
Martin
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