Throttle roll on TBS...Can it be improved? - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 3 (permalink) Old 11-06-2012, 10:04 PM Thread Starter
Grand Prix 125
Main Motorcycle: Triumph Thunderbird Sport
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Throttle roll on TBS...Can it be improved?

So I've been switching between my 2000 TBS and 2010 Speed Triple. One thing that I've noticed is the enormous difference in rolling the throttle control on the 2 bikes. While the SpdTrip is incredibly easy to roll...requiring very little effort, the TBS is rather difficult, requiring much more effort! I'm wondering if there is a way to improve this on the TBS and achieving an improved riding experience? Perhaps a minor adjustment to the TBS would do the trick. I suppose that the cable control on the TBS is the limiting factor. Any thoughts or advice from the community?
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post #2 of 3 (permalink) Old 11-06-2012, 10:50 PM
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Change the throttle return springs to make the action "lighter". You can also change the profile of the throttle cable cam. If you remove the 2 screws on the throttle housing and look inside where the cables connect, that's the cam. By changing its shape you can alter how far you twist the grip from shut to wide open and that gives a different feel. I changed mine on my twist is 120 degrees. Rizoma makes some nice grips that come with a couple of different cams. Good luck !

Over the hill and picking up speed on the way down...!!!
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post #3 of 3 (permalink) Old 11-07-2012, 03:14 AM
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Have you checked this?

I have never ridden a speed triple, but I don't think that the effort to roll my throttle is excessive. Have you checked that the throttle cable moves freely within it's sheath? When the throttle cable becomes worn or kinked, the damaged strands of wire can cause binding within the sheath. Also, the plastic bit that guides the throttle cable within the switch cluster can get gunk in it or become damaged and cause cable binding. The most common result is that the throttle sticks and doesn't return to idle when released, but it's possible that the problem can cause excessive drag resulting in increased effort to operate the throttle without increased drag in the return direction. If you take your throttle cable off the bike, you can play with it and see if it moves freely without anything else (like binding at the carburetors) interfering. If the cable does not slide back and forth with little effort, then clean and lubricate the cable. If that does not fix it, replace the cable. I have had my TBS since 1998, and I have never had a problem at the carb end; it's always been the cable.
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