MTFCA Forum

I am sure this has been cussed and discussed many times.
Yes, I have searched and there are a 2k hits on throttle.

I am tooling down the road with the throttle and timing down.
Need to slow down just a little.
Bump the throttle up, nothing, bump up a little more. It seems that it needs to be bumped up way up.
Then the acceleration drop dramatically.

The linkage is not loose but not tight either.
Is this normal? I have learned to live with it.
Just wondering if there is anything that I can do to, to decelerate without dropping way down.

Thank you,

Steve B.

Could be in the carb...maybe the throttle lever on it is real sloppy where it enters the carb. That may attend to the delay.

Play can be cumulative. The link in the throttle hole, the spark arm hole and the tightness of the arm to the throttle rod all ad to the slop. Also the fit of the butterfly shaft in the carburetor are all suspect. I had looseness in all those places and very little travel until I attended to it.
Rich

retard the timing too.

I will try retarding and the throttle at the same time.
When I get a chance, I will check the carb shafts.
Thank you for the replies.

If running on battery, a small lever retard will be noticed. If running on mag, you must move the retard to the next node before there is any change, that's about 1/3 of arm movement on the quadrant.

As stated, slop magnifies with each joint. Worst is a loose column throttle lever. It must be tightly pinned, a cotter pin wont cut it.
You have that plus wear in the lever hole & rod @ both ends of the rod & a sloppy carb throttle shaft.
Another minor factor could be your compression. Less compression = less motor braking.
A high compression motor is more responsive to backing off the throttle & spark retarding.

John, a tapered cotter pin like the one used to fix a pedal shaft to the axle on a bicycle is certainly up to the job. The trouble is you guys call a split pin a cotter pin. A split pin is not the answer here.

Allan from down under.

Despite the translation issue, we are on the same page.