Throttle Linkage Improvements

[Travel'n Man 51 3 Vehicles]

This is how I ran my Mikuni's:

http://www.classiczcars.com/forums/carburetor-systems-s30/30584-accelerator-linkage-fix-questions.html

[nissanthanh 0]

Hey Zedhead, can you post a picture of what you did regarding the bell crank?

[Zed Head 2,195]

Here's a super simple drawing explaining the concept. There are several areas where you can shorten or lengthen the linkage to change the leverage ratio. I just went around and tried to get all of them starting at maximum leverage. That way, as you press the linkage effort keeps increasing consistently, starting low and going higher.

If it's set to start at low leverage, going to high, then the effort required goes from high to low to high when pressing the throttle, as the lever arm goes over the center of the pivot point (what I meant by over-center). I think that confuses the foot and leads to slow-fast-slow (or hard-easy-hard) throttle operation.

That was my theory and it seemed to work for my problem.

Bell crank leverage.bmp

[nissanthanh 0]

Thanks ZedHead! I'm going to try that this weekend. If I get frustrated I might just go the Lokar cable route. It seems so much simpler...

[nissanthanh 0]

BTW, which type of lube did you guys use? I bought a can of wd40's silicone lube spray. Doesn't really seem that thick...

WD-40 Specialist 11 oz. Water Resistant Silicone Lubricant Spray with Smart Straw

[Fred Sigarto 28]

I've also drilled a small hole the size of those small ''straw'' tubes from the inside out of the plastic caps of the linkage to squirt PB blaster or other lube. Worked for me, don't get throttle hang up any more.