Throttle Not Opening All the Way Up

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Re: Throttle Not Opening All the Way Up

Postby Rudi » Sun Jul 07, 2013 10:17 pm


I have two of these and they are really handy to have. Pretty darn accurate .. they are a must in my tool box :!:


And that is a really good price. Most of the time they go for a lot more. To get the pair I have, I must have bid on 20 or 30 of them to finally win.
Confusion breeds Discussion which breeds Knowledge which breeds Confidence which breeds Friendship

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Rick Spivey
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Re: Throttle Not Opening All the Way Up

Postby Rick Spivey » Mon Jul 08, 2013 5:14 am

I doubt any cub that is functioning correctly actually uses all the notches up, and has a noticeable increase in engine speed at each new both setting. Some of them only use 1/2 the notches to achieve full throttle settings. I wouldn't worry about the last three notches, nor the fact that you can move the throttle lever when at "full throttle" setting. Both are normal. As others have said, focus on the correct things here, which are removing any slop in the governor to carburetor linkage, and the actual RPM measured at "full throttle" setting on your throttle quadrant.
Rick Spivey
'52 Cub ("Great Personality") 148xxx
'48 Cub with FH ("Gunny Cub") 38xxx
'57 Lambretta (a slow work in progress)
'74 Triumph TR6 (Mama's toy)

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