what causes motorcycle trike front wheel to wobble

07-01-2014,06:04 AM

I just finished converting my 2001 Fatboy to a Mystery Designs IRS trike. Information technology turned out perfect except for a low speed wobble that doesn't go abroad. I changed the stock 16x3.5 front bicycle to a 18x3.v RC Compontant wheel and a low profile Avon tire that seems to fit perfectly. Except, now that I think about information technology, the new wheel is near 1/2" narrower than the stock and i used the same spacers, non even sure if I have the most chamfered finish facing away from the wheel on both sides, or even if that would brand much of a defferance. What exercise yous all call up or know what could be the trouble? I take a 7 degree steering caput that makes it easier to steer and eliminate high speed wobble but there has to be something else that i may accept overlooked. Any assistance is greatly apperciated. I'll try to attach a motion picture or two.

07-01-2014,12:27 PM

Welcome to the Forum!

Looking forward to pics of your conversion.

Is a steering damper part of the Mystery conversion you lot installed?

If not, installing i should take intendance of your low speed wobble.

07-01-2014,02:39 PM

WOW, a front wheel wobble exist information technology depression speed or high speed would scare the hell out of me. And so many places to look!! The front wheel spacers being ane/2 inch too short is a good place to start. You mentioned a 7* steering head, did yous have the steering knuckle cut/welded, or is the 7* in the triples? Did you tighten the steering bolt to specs, or was the triple tree aligned before tightening? I know some folks aren't as well neat on taking their trikes to mechanics, with a steering wobble that is the first place I'd take mine. At 69 I'yard too young to die because I started wobbling at 70mph

Proficient Luck and enjoy that scoot!!

07-01-2014,09:03 PM

On a trike the steering caput nut has to exist a lot tighter then the stock setting. One or less swing will work.

07-04-2014,07:forty PM

Quote Originally Posted by fatboy View Post

picture of mystery trike

Prissy

07-fourteen-2014,11:36 PM

Quote Originally Posted by fatboy View Post

motion-picture show of mystery trike

A depression speed wobble isn't all that uncommon going over a bump or some such, Maybe it'due south a matter of getting used to it?

Mine can have a low speed caput milkshake under those weather and I know everything is right considering I did myself. I got used to information technology and don't crave a steering damper, If I thought I did I would do it. My trike never has whatsoever wobble when I am in ability band.
Keep in listen that a damper is actually making it a bit harder to steer so you would have to get used to that too.
Keep in heed your Harley has bookoos of low end torque.

On some trikes I have ridden they seem to have a trend to wobble if your lugging the engine.
Before you go to excited about things take your trike out and run it ever keeping it in a gear where the engine is pulling and run into what difference it makes?
Nether those conditions they seldom had a caput shake.

I volition agree nevertheless that the steering nut must be tighter than stock.
If your manual says forty lbs. torque try 60 lbs.?
The bottom bearing in your neck should be a conical type bearing especially if y'all added a new raked triple tree and a conical bearing tin stand a whole lot more than abuse than a standard flat begetting.

For pictures and explanation of how I prepare up my front end Google-pcombe library/ photobucket.

07-15-2014,07:21 AM

i agree with the thought of the wobble going away if the engine rpm's are pulling your ride. i had a existent modest wobble at 40 to 42 mph and simply at that speed. if i drop a gear and become the aforementioned speed the wobble goes away, do non understand it but it does go away then sometimes things are better left unknown.

07-15-2014,08:43 AM

I made this rough drawing I fastened to illustrate what I recollect is the dynamics of the steering wobble.

The trike is a triangle setup. The rear terminate existence wider and e'er pushing straight. The right side on nearly setups is the power side that moves the trike forward. As you ride or slow downwards the torque pulse from the drivetrain through the rear end pushes and lets off, button and lets off. As its doing this the right side of the rear ( ability ) is pushing then releasing the push. This I think is causing the wobble you lot experience at slow speeds or slowing downwards.

Other factors that I think tin increment the wobble effect are

Rear end alignment

Drive belt adjustment

Rear tire force per unit area

Steering caput bearing adjustment

Engine mount bushing clothing and rear end bushing wear

Condition of the road surface ( Tire ruts, cantankerous slope of the road for drainage )

I dont recollect the wobble result can be eliminated, but can exist reduced.

Sharland Hositany1960

what causes motorcycle trike front wheel to wobble

Low Speed Wobble

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Re: Depression Speed Wobble

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