Post by: McCabe-Thiele (Ted) on March 10, 2022, 01:52:53 PM
I have looked at some previous posts on the subject but unsure if the markings on the 400 rear forks/swing arm are reliable.
I initially tried by pushing the front wheel & axle fully forward into the rear swing arm then when the two adjusters had taken up the slack turned the two bolts by an equal number of turns until the chain movement was about right. The rear swing arm marks are not equal they are slightly further back on the main sprocket side with 7.5 turns each on the long adjuster bolts.
I've read about viewing it by eye in my manual but am minded to now go by the arm markings instead - what would folk hear do?
Post by: Nurse Julie on March 10, 2022, 02:18:55 PM
Post by: McCabe-Thiele (Ted) on March 10, 2022, 03:07:02 PM
Use a Vernier to measure them Ted.If I understand you correctly Julie you are saying the swing arm marks are accurate - use a vernier to measure the distance between the notch on the adjusters and the marks on the swing arm?
Post by: Laverdaroo on March 10, 2022, 07:44:45 PM
Post by: Moorey on March 11, 2022, 12:45:57 PM
Or use a long straight edge through to the front wheel.
Post by: allankelly1 on March 11, 2022, 12:48:55 PM
Different bike but same check
(https://uploads.tapatalk-cdn.com/20220311/941f0993876c32b960ff9fe301e0f75b.jpg)
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Post by: Athame57 on March 11, 2022, 01:04:37 PM
Post by: allankelly1 on March 11, 2022, 01:07:31 PM
What's a Vernier? ???Think is some sort of disease you can catch from “bikes” if you are not careful
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Post by: Bryanj on March 11, 2022, 01:43:50 PM
Post by: Athame57 on March 12, 2022, 04:56:57 PM
Something thats gets you very near to rightI wondered if you had spelled Hernia wrong! I googled it, senior moment. I was looking at my own drive chain today, lots of life left in it but it is also showing a lot of rust along it's sides, I've never had that one before, but have I ever had a chain on a bike so long before? I vigorously rubbed it over with chain lube and it seems to have helped a bit, I'm wondering if trying too hard to clean it will do more harm than good?
Post by: Lobo on March 12, 2022, 09:46:31 PM
I’ve occasionally done the task with a laser beam (modern string)…. but really have to ask, “is it that bloody important?” Seriously, (& I don’t know the answer), for the performance of the bike, tyres etc, are the Swing Arm graduations + eyeball not accurate enough?
Post by: McCabe-Thiele (Ted) on March 12, 2022, 10:33:01 PM
I’ve often wondered about the accuracy of the markings, and whilst matching exposed threads method myself, realise this isn’t the answer as it assumes perfect symmetrical build of the two ‘forks’.
I’ve occasionally done the task with a laser beam (modern string)…. but really have to ask, “is it that bloody important?” Seriously, (& I don’t know the answer), for the performance of the bike, tyres etc, are the Swing Arm graduations + eyeball not accurate enough?
Back in the 1960's I just went by the markings on all my bikes - the naivety of youth or the overthinking of old age!
Post by: Bryanj on March 12, 2022, 10:36:34 PM
In fact over 90% of the time we found that after using the straight edge the marks were exactly the same side to side
Post by: Laverdaroo on March 13, 2022, 11:30:16 AM
Yes a ball of string is your friend
Different bike but same check
(https://uploads.tapatalk-cdn.com/20220311/941f0993876c32b960ff9fe301e0f75b.jpg)
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oooooo, I do love that Allan!
Post by: allankelly1 on March 13, 2022, 08:19:53 PM
Hi RooYes a ball of string is your friend
Different bike but same check
(https://uploads.tapatalk-cdn.com/20220311/941f0993876c32b960ff9fe301e0f75b.jpg)
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oooooo, I do love that Allan!
Yes it’s getting there very slowly
Trouble is it’s not even a hybrid with a factory frame / bike with a change of certain parts
Completely a one off that make is a very hard build as the base is a Tigcraft super mono race frame with other parts sourced from other manufacturers such as a Yamaha 350LC motor, KTM wheels a Honda NSR 250 rear arm fitted with Ohlin mono shock and Cagiva Mito front forks etc etc
Under a dust sheet at the mo but it’s next on my list of things to finish
Take care and best wishes Al
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