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Triumph Torque    Cars    Spitfire/GT6  ›  Throttle linkage - No cable.
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Spitty2Dream4
July 1, 2009, 12:44pm Report to Moderator


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Hello Team.
For whatever reason, my Spit 1500 does not have a throttle cable, but instead it has a lever type linkage.
I find that when going over a bumpy surface, it will cause my throttle foot to move and results in me kangaroo-ing down the road until I lift-off and re-apply the throttle gently.
Is this a common occurence with this type of linkage and is there any way to resolve it?


Spitty2Dream4.

Triumph Spitfire 1500 - 1978 - Pimento Red (at the moment).
VW Touareg 2.5 SE - Silver with some bling side bars and Aero roof bars.
SWMBO - Peugeot 207 1.6TDI Sport - Silver.

Location - Sunny South Wales.

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sparky_spit
July 1, 2009, 4:17pm Report to Moderator

Mike Banks
Club Member
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A 1500 would normally have a cable operated throttle, as would a Mk4. Mechanical linkage operation was used on the earlier roundtails (Mk1, 2 & 3). I actually prefer it, owning both types, but this is personal preference.

The kangarooing is not just limited to mechanical linkage if it's induced by your foot moving the pedal when going over bumps, that would happen with cable as well. But what does sometimes happen is that when the engine moves on its mountings (maybe going over a bump) the "solid" linkage between carbs and pedal pivot point on the body causes the throttle to open or close slightly. That is what usually starts off the kangarooing, then your foot takes over. You do not get this with cable operation, obviously. It's something you learn to live with - changing to cable is quite involved unless you have a spare cable operated car to raid all the bits from.

I'd stick with it unless you are really unhappy with it.


Location - slightly further North Essex

Rene Descartes.  Wasn't he in 'Allo 'Allo?

"If you can't fix it with mole grips, then it doesn't need fixing"

1968 MkIII Spitfire - 2009, 2013, 2015 10CR. 2009, 2010 Nachtrit. 2011, 2012, 2014, 2015 HCR (..and 11/14ths of the 2011 10CR)
Honda CB400SF - sunny Sunday morning ride.
Yamaha RS200 two stroke smoke machine.
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GT6Craig
July 1, 2009, 5:15pm Report to Moderator


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Providing its a similiar set up to the GT6, the return spring can become weak over the years. I cut mine shorter and its much tighter meaning i get hardly no movement in the linkage when going over bumps.


Name: Craig C
Location: Huddersfield, West Yorkshire Irlam, Manchester
Cars: GT6 Mk3 - finished! MOT next.
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