FF: Forks handle bar shake at low speed.

[Bill Thomas]

Yes, that's what Avon recommend (max for 21" 90/90). My "B" 18" 410 / 80 and on WM5 (3"wide). When teenagers Harvey and I had unpaid jobs in the paddocks of the IOM TT 1966 it looked as if all bikes ran on Dunlop Triangular tyres and they looked triangular except Honda as they had much wider rims, more support also more rubber on the road. When the "A" gets home again and thinking of removing 19" S/S rim and lacing on a 21" WM 4 as the 410 x 19 I had to cut tread off the chain side to clear, I will also increase gearing which it can take as seldum change from top.

Hello Marcus, Do you think we will ever get it right ? !.
After all these years, We are still playing.
I have been changing front fork preload on my comet springs, So many times in the last few days,
I think it is now the best ever !, But maybe not !!.
Cheers Bill.

 

[Marcus Bowden]

The "feel" of the day or "moment". So many times I've set off either it's feeling good or bad yet I haven't made an alteration or adjustment for several run outs, always thinking of , did I tighten that enough or did I rewire that sump nut up again ! What sound is that ? Going off thread but tire feel is also changes from ride to ride yet never go any where near limits of tire grip, on occasions I have had to do a Peter Volkers lean and surprise myself that I came out of it unscathed.
bananaman

 

[RDB58]

I had a very similar problem. I could not fix it until I put in new steering races and balls.

 

[ossie]

I had a very similar problem. I could not fix it until I put in new steering races and balls.

that's the route I was contemplating going down.

 

[ossie]

Ossie,is your front wheel balanced? I fitted a new 300x20 Speed master once that needed a lot of lead to correct the unbalance.

balance is ok Len

 

[Martyn Goodwin]

that's the route I was contemplating going down.

Save worry and possibly broken bones by fitting a modern hydraulic steering damper.

 

[greg brillus]

Haven't seen too many Vin's with Brampton's that have a hydraulic steering damper, damned awkward to mount one I would say.

 

[timetraveller]

Ossie. many years ago I had a Range Rover and had new tyres fitted all round. A soon as I left the tyre fitters it was clear that something was wrong. The car pulled so strongly to the right that it would go up a steeply cambered road surface and cross to the other side of the road is if I let go of the steering wheel. I took it back and the changed the wheels, side to side. It then pulled hard to the left. It was just before Xmas so I drove up to Yorkshire and back again and took it back. They test drove it and agreed that it was unacceptable and despite the fact that by then I had done 600+ miles they changed the tyres free of charge. It seems that some tyres have manufacturing faults that at not easily visible. If you can't find anything else then it might be worth putting your front stand down and watching the pattern of the tread on the front tyre move relative to a fixed pointer as you spin the wheel. Let us know what you find as it could happen to any of us.

 

[Gerry Clarke]

I've only noticed worn steering head bearings in the past when braking. Maybe of no relevance in this case, but I had a recent issue on a rigid frame tele fork BSA where I spent weeks chasing head races and fork alignment issues for extreme steering upset, only to have a friend point out that the new rear tyre was not seated correctly on the rim. Collapse of stout party.

 

[Albervin]

I had a similar experience some years ago. There was a flat spot in the rim that was virtually undetectable until I removed the tyre. Only a low speed wobble and not intense enough to cause a drama but very irritating. Only around 15km/h; not slower, not faster. A PITA in town traffic. Trued the rim and job done. I hope this helps.