Catrike - Shimmy

[Grolsch]

I recently had my Catrike serviced at the selling dealer. Since, I have had
less stability in the steering, a shimmy at speeds of 20kph or better. If I
take my hands off the steering (or barely on) a shimmy develops. The toe-in
is set to spec (1/8") so that is not the problem. There was apparantly
nothing that was worked on during the service which should have affected
steering. Tires are seated properly, wheels straight, spoke tension good.
All appears normal, yet the shimmy is there. Interested in any ideas or
comments. TIA

Grolsch

--
____________________
HJ Wilke Consultants
2335 Marlborough Drive
Nanaimo, BC, V9S 3J3
____________________

 

[gotbent]

Did you somehow actually check the toe-in?

Just a few random thoughts; loose tie-rod end bearing (retaining nut loose),
worn ball-ends, misadjusted king-pin bushings/bearings, tires not inflated
equally and rear wheel axle not properly centered in drop-out.


"Grolsch" <[email protected]> wrote in message
news:Q_9gi.8454$qC1.6807@edtnps89...
>I recently had my Catrike serviced at the selling dealer. Since, I have had
>less stability in the steering, a shimmy at speeds of 20kph or better. If I
>take my hands off the steering (or barely on) a shimmy develops. The
>toe-in is set to spec (1/8") so that is not the problem. There was
>apparantly nothing that was worked on during the service which should have
>affected steering. Tires are seated properly, wheels straight, spoke
>tension good. All appears normal, yet the shimmy is there. Interested in
>any ideas or comments. TIA
>
> Grolsch
>
> --
> ____________________
> HJ Wilke Consultants
> 2335 Marlborough Drive
> Nanaimo, BC, V9S 3J3
> ____________________
>



--
Posted via a free Usenet account from http://www.teranews.com

 

[Grolsch]

Just did a Toe-in check, took it from 1/8" to neutral (0"). increased tire
pressure from 35psi a side to 60psi per side. I'm running Big Apples BTW.
There's 5400km on the trike so some parts may be showing some wear,
including the tires, but as I said I just had a full service, incl chain and
freewheel + adjustments. I wish they'd leave the toe-in alone. When I first
got the bike a year ago the toe in was set at >1/4"... wayyyy too much.
Anyway, a test ride indicates some improvement on the shimmy. Now a full
ride to see. Check back, I'll update.

Grolsch




"gotbent" <[email protected]> wrote in message
news:[email protected]...
> Did you somehow actually check the toe-in?
>
> Just a few random thoughts; loose tie-rod end bearing (retaining nut
> loose), worn ball-ends, misadjusted king-pin bushings/bearings, tires not
> inflated equally and rear wheel axle not properly centered in drop-out.
>
>
> "Grolsch" <[email protected]> wrote in message
> news:Q_9gi.8454$qC1.6807@edtnps89...
>>I recently had my Catrike serviced at the selling dealer. Since, I have
>>had less stability in the steering, a shimmy at speeds of 20kph or better.
>>If I take my hands off the steering (or barely on) a shimmy develops. The
>>toe-in is set to spec (1/8") so that is not the problem. There was
>>apparantly nothing that was worked on during the service which should have
>>affected steering. Tires are seated properly, wheels straight, spoke
>>tension good. All appears normal, yet the shimmy is there. Interested in
>>any ideas or comments. TIA
>>
>> Grolsch
>>
>> --
>> ____________________
>> HJ Wilke Consultants
>> 2335 Marlborough Drive
>> Nanaimo, BC, V9S 3J3
>> ____________________
>>
>
>
>
> --
> Posted via a free Usenet account from http://www.teranews.com
>

 

[Grolsch]

Well setting toe-in at near neutral seems to do the trick, absolutely no
shimmy at any speed. Back to it's purpose in life... to be ridden, and
ridden often. See ya.

Grolsch


"Grolsch" <[email protected]> wrote in message
news5cgi.8484$qC1.2052@edtnps89...
> Just did a Toe-in check, took it from 1/8" to neutral (0"). increased tire
> pressure from 35psi a side to 60psi per side. I'm running Big Apples BTW.
> There's 5400km on the trike so some parts may be showing some wear,
> including the tires, but as I said I just had a full service, incl chain
> and freewheel + adjustments. I wish they'd leave the toe-in alone. When I
> first got the bike a year ago the toe in was set at >1/4"... wayyyy too
> much. Anyway, a test ride indicates some improvement on the shimmy. Now a
> full ride to see. Check back, I'll update.
>
> Grolsch
>
>
>
>
> "gotbent" <[email protected]> wrote in message
> news:[email protected]...
>> Did you somehow actually check the toe-in?
>>
>> Just a few random thoughts; loose tie-rod end bearing (retaining nut
>> loose), worn ball-ends, misadjusted king-pin bushings/bearings, tires not
>> inflated equally and rear wheel axle not properly centered in drop-out.
>>
>>
>> "Grolsch" <[email protected]> wrote in message
>> news:Q_9gi.8454$qC1.6807@edtnps89...
>>>I recently had my Catrike serviced at the selling dealer. Since, I have
>>>had less stability in the steering, a shimmy at speeds of 20kph or
>>>better. If I take my hands off the steering (or barely on) a shimmy
>>>develops. The toe-in is set to spec (1/8") so that is not the problem.
>>>There was apparantly nothing that was worked on during the service which
>>>should have affected steering. Tires are seated properly, wheels
>>>straight, spoke tension good. All appears normal, yet the shimmy is
>>>there. Interested in any ideas or comments. TIA
>>>
>>> Grolsch
>>>
>>> --
>>> ____________________
>>> HJ Wilke Consultants
>>> 2335 Marlborough Drive
>>> Nanaimo, BC, V9S 3J3
>>> ____________________
>>>
>>
>>
>>
>> --
>> Posted via a free Usenet account from http://www.teranews.com
>>
>
>