wobbling when no hands on handlebar - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 66 (permalink) Old 04-17-2017, 10:40 AM Thread Starter
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wobbling when no hands on handlebar

All was good till I have got the annual service done at dealership for my T120

Now a day later I see it's wobbling when removed my hands from the handlebar...

I know I shouldn't remove my hands from handlebar..

Is that an indication of some major issue around the corner?

Thanks
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post #2 of 66 (permalink) Old 04-17-2017, 11:30 AM
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is it wobbling through out or at specific speed range?
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post #3 of 66 (permalink) Old 04-17-2017, 11:45 AM Thread Starter
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didn't notice.. probably arounc 40-60 miles range
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post #4 of 66 (permalink) Old 04-17-2017, 02:53 PM
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Maybe a wheel is out of balance? Perhaps a brake rotor is warped?

In any case, a fairly new bike like the T120 shouldn't wobble at any speed. I'd go back to the dealer and inform them of this.
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post #5 of 66 (permalink) Old 04-17-2017, 03:30 PM
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If you have a lot of miles on your front tire, the tire itself could be the cause. I just went through this on my Honda 919 where the front end "no hands" wobble got worse and worse to the point that I could feel it even with my hands on the bars. It was worst between 40 and 60 mph. The front tire had something like 9000 miles on it but still had plenty of tread left. However, I mounted a new tire of the same size and brand and the wobble was gone. No wobble at any speed.

It's an annoying problem but it is not uncommon in motorcycles or in some cars and trucks.
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post #6 of 66 (permalink) Old 04-17-2017, 03:37 PM
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Quote:
Originally Posted by Doberperson View Post
If you have a lot of miles on your front tire, the tire itself could be the cause.
Or even if you don't just normal wear can be enough to cause it at various speeds. Fork mounted windscreens can also induce wobble.
The only thing I can think of that may be dealer related might be if he over torqued the steering stem. But I don't think they diddle with them until 10k miles and if you have that many miles on the tire, a little hands free wobble is almost a certainty.
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post #7 of 66 (permalink) Old 04-17-2017, 03:39 PM
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One thing everyone should do when having someone other than yourself service a bike, go over every little detail to make sure it's right.
As soon as you get the bike back to the house, or in the parking lot go over everyone of the fasteners.
These guys can overlook a bolt, wrong torque etc. I would check the axle nut and pinch bolts to make sure they are secure. Air pressure as well.

I spoke to a chap who told me he had not checked air pressure on his Thunderbird in three years, I just walked away.

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post #8 of 66 (permalink) Old 04-17-2017, 09:18 PM
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It's the tire. Mine did the same thing from about 1000 miles up till 8500 when I changed the tires. Different brand of tire now no more wobbles at any speeds when I take my hands off the bars


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post #9 of 66 (permalink) Old 04-17-2017, 11:18 PM
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Quote:
Originally Posted by Captain_nd_coke View Post
didn't notice.. probably arounc 40-60 miles range
caveat: this is purely out of experience on my 2016 ST.

assuming that the tyres are correctly inflated

first thing to do would be to check that the rear tire is mounted properly and chain etc. is aligned (easiest way i figured is to see if the rear tyre has an even contact patch i.e. its wearing out evenly on both sides moving out of the centre of the tyre)

second thing would be to check if the top bolt that is used to mount the engine dresser bar is torqued correctly to 80 Nm and not higher to 100 Nm or so in addition to what the member saddlebag suggested above regarding the steering stem

third thing to do would be to find a straight, even and relatively unoccupied road. take the bike to the offending speed i.e 40 - 50 mph (80 - 110 kmph) and let go of the handle bars for slightly longer and see if the wobble is developing into a full on tank slapper or if its just rocking a bit and then correcting itself.
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post #10 of 66 (permalink) Old 04-18-2017, 12:06 AM
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Capt, how many miles on that front tire?

Like others mentioned above, I have had this happen before and it was the front tire at the end of its life even though there appeared to be a lot of rubber left on the tire.

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