i have an 88 lt250r, my question is, was the stock carburetor a mikuni or a keihin, was it both?
im not , my manual only list the mikuni and i have a keihin carb, i didnt see any markings on it so i dont know if its the 39pwk
im new to the game , so any help i would appreciate

 

The stock carb was a mikuni 34mm. Keihins are a better carb for quads.

chuck

 

Yeah the LT's came with a Mikuni, but a lot of people switch out the Mikunis for Keihins because they are easier to find parts for at your local bike shops and are better performers.

 

I tried both Mikuni and Keihin on my 87 LT250R and the best carb i found was a ESR Mikuni TMXx 36mm. Starts great and runs like a champ, with easy jet changes. I know a lot of people that love there Keihin, and I know they are good carbs, but don't count out the Mikuni. If you go with a Keihin stay away from the PJ's...they idle like %$#%.

 

Any of you guys ever add the mikuni power jet modification to their mikuni carbs? I want to try it but I just want to see if anybody has ever done and know what the results were.
later
Superstar

 

Oh yeah, hey 87RaceRider what is the difference between the regular TM and the TMX flatslides?

 

The TMX is just the newer version. I don't know what they changed but it is suppose to be an improvement over the TM. Mikuni currently makes different versions of the TMX. I have the TMXx which is the Mikuni that Eddie Sanders Racing(ESR) sells. What I like about this model is it uses a screw to raise and lower the slide just slightly to adjust the idle. I have found this simple way of controling the idle is very effective.

 

jmoney did you get your cool head installed yet?