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royaloilfield
royaloilfield
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#853872 07/16/21 7:29 pm
Joined: Oct 2017
Posts: 20
S
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S
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Posts: 20
Hi all,
I have a T140E 1980 with spoked wheels. I’m getting a shake from the front wheel, I fitted stainless rims and used the original spokes. Wheel was trued, no wobble, not oval, all spokes tensioned, fitted an Avon Road Rider 100/90 19”. Set wheel up on axle stands and balanced with spoke weights.
From about 35 to 55 MPH it shakes, above that speed smooth,
Pulled the forks apart and checked all the internal components and order with the genuine workshop and parts books, reassembled with SAE5 fork oil and 1” spacers on the springs. Forks are not sticking and work smoothly.
Still the same from about 35 to 55 MPH it shakes, above that speed smooth,
Fitted a Vee Rubber VRM191 100/90 19” tyre at 28PSi, balanced tyre, now it shakes from 30 to 42 MPH, when you get to 50 MPH and above it’s smooth.
My last bike was a 1972 TR6, I fitted stainless rims, new tyres, balanced tyres, trued wheels and all that, no problem, no shakes just smooth at any speed, so I have done all this before and on other bikes as well. I know the change of tyre altered the vibration period which points back to balance but as I ‘ve said I have balanced wheels before with no problems so what’s happening here?
Can any one tell me what I am missing or do I just live with it as it’s not un-ridable.
Thanks in advance, Steve.

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Q
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check the engine mount bolts ?

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S
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Yes done that and all tight.

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OK an update, missed the white spot on the VEE RUBBER tyre, I have now lined the white spot on the VEE RUBBER tyre with the valve and rebalanced, sorted, vibration gone, smooth at any speed! I contacted Avon and received an EMAIL back saying there tyres do not use a balance spot, they should work in any position, this was from the technical department. So I have a front Avon tyre which is four years old with about 200 miles on it, and it seems to be faulty as I could not get it to work in any position on the rim. Never fitted a VEE RUBBER tyre before but it seems to be grippy and stable, how it wears I shall find out in due coarse!

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I would suggest the wheel was not balanced correctly with the Avon tyre fitted


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Originally Posted by Andy Higham
I would suggest the wheel was not balanced correctly with the Avon tyre fitted

Or mounted correctly.


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