[mistretta419]

i came across a slightly used tb143 kit w/ racehead (not the v2) and a 28mm tb carb, is that to much carb for that bore kit and does anyone have any suggestions with what jetting to try? thanks for the help I greatly appreciate it.

 

[CTATV]

I was recommended to run the 26mm carb with my 143 motor & since putting in a new piston & porting the head it runs GREAT. my engine builder is building a 17? 178 I want to say, KLX and he is using the 28mm on that. Sorry I dont have a definitive answer on if the 28 will work but hey free thread bump...

 

[badmatt828]

You can run a 28mm carb on a 143 or a 26mm it's all in what you like. With the right jetting they both work great.

 

[firepower354]

28 will work, but not be much gain, with the tortuously twisted manifolds, smaller displacement, milder head.

 

[stevos50nuts]

I was recommended to run the 26mm carb with my 143 motor & since putting in a new piston & porting the head it runs GREAT. my engine builder is building a 17? 178 I want to say, KLX and he is using the 28mm on that. Sorry I dont have a definitive answer on if the 28 will work but hey free thread bump...

what do you got for jetting

 

[CTATV]

what do you got for jetting

Im not sure I bought the carb used i ran whatever was in it and just ajusted the clip on the needle...

 

[mistretta419]

thanks for all the replies, unfortunately i am missing the idle screw and spring, does anyone know where i can get replacement parts for the keihin pe28?