recently i sent my carb to hightower for the spring fix. all i can say is all better now. its just a little stiffer than stk. thanks alot chris!!! this is with the pump!

 

Dr. Hightower worked on mine to, when I had it, made a big difference. [img]i/expressions/face-icon-small-smile.gif[/img]

 

When you say big difference do you mean in throttle stiffness or performance?

 

going from no pumper to pumper, big performance gain, no secret there, Mikuni pumper carbs rock from the factory by their own rights.

modding the springs to make the pumper usable with a thumb throttle without needing Popeye arms makes a big difference for comfort and drasticaly reduces thumb fatigue.

It would be nice if whoever makes the springs for these carbs offered them in a tension suitable for thumb levers, but they were made for twisties on harleys so we gotta make due.

Glad you dig it shmee [img]i/expressions/face-icon-small-smile.gif[/img]

 

shmee,
this was for the TM48 you got right ? so I take it the 48 is shiped w/ the heavy spring like the 45 if the pump is activated? or was your 48 pump not actvated when U got it as well.

I got help w/ my TM from "The DR." as well last yr on my 45 hes the man[img]i/expressions/face-icon-small-wink.gif[/img]
Sam

 

no i called ron and told him what i wanted in and on the carb. jets, springs, pump ect. i just couldnt get it right with the pump and light spring. so i let hightower fix it for me. works perfect now. so dont be affraid of the tm's becouse of there stiff thumb " it can be fixed"!!!

 

you guys havin trouble jettin ur TM's? Im havin the hardest time, was sooo messed up when i first recieved it, but i talked to Higtower (thanx again) and got it within runnin good, but its never been dead on, always somethin, and now that the cold is here im worse off lol, my efforts got me in the right main jet range, but i should have been changing the pilot jet and air screw before that, lesson learned i guess, still workin on it...