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TR4/4A TR4A Throttle - Lower linkage length

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Alec

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On the TR4A HS6 set-up, can anyone provide the correct length of the lower throttle linkage (pedal arm to bell crank) please.

Mine is currently 9" ball-to-ball of the respective turn-buckles, and the top of the bell crank is not level, which seems to be placing some stress on the motion of the vertcal link and therefore imposing side force on the carb throttle shaft connection. I also have to get rid of the slop in the bell crank shoulder bolt.

Any measure lengths would be appreciated
 
Been working at trying to optimize the linkage geometry and seem to be settling on 8 3/4" and 3 1/8" ball-to-ball for the main/horizontal and Vertical/secondary links respectively. with this relationship the bell crank has a slight upward slope for the top surface, (vertical link ball slightly higher than main link ball), such that the vertical link motion is almost straight up and down

however, this set-up still has to be checked for WOT.
 
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