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Need Mikuni 36mm jetting ranges
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Posted by: 250r rider 88

Heys guys, if you happen to be running this carb, with a low to mid pipe and porting etc. please let me know what your jetting specs are im trying to get a range so i dont have to puchase a million jets for this thing

Posted by: 250r rider 88

TTT

Posted by: Showcase

i have a 38mm and im trying to find this also

Posted by: bkconwayls1

Hey showcase, I have a 38 with a midrange pipe and Boyesen Rad valve. According to Boyesen, I should be in the range of: 168-172 and
48-55

the needle size they gave me made no sense, so I have read alot on here that a CEL or DGH needle works well.

Posted by: 250r rider 88

r u talking about a 38 keihn or 38 mikuni because the mikuni jets start around the 450 range not 180 like keihn

Posted by: Showcase

i have a mikuni....any help would be appreciated.

Posted by: bkconwayls1

Yea I have the wrong carb, sorry about that.

Posted by: 250r rider 88

BUMP!!!

buehler?...anyone?,.....anyone?

cant believe no one is running this carb setup someone has to know a good range to start jetting with

Posted by: mxracer97

I am running a 38mm Mikuni TMX carb on an ESR 310 cylinder with TRX7 porting. I am also running a K&N air filter with no lid on a stock airbox, and an ESR TRX6 pipe. My current jet settings are:

25 pilot

6BEH1-73 needle with the clip on the second from leanest position

420 main

My altitude is about 800-1000 ft, average temp 70-90 degrees. This jetting is on the rich side. I realize this isn't a 36mm carb, but it may give you some idea of where to start.

Posted by: 250r rider 88

160? what carb? cant be the mikuni cause the jets i got in it from esr were 460 if u arent using the mikuni please dont post as it is no help to me and the other guy asking thank you

Posted by: 250r rider 88

hey mxracer97, the jets that came in the carb form esr are 460main 25 pilot, clip in middle position, now correct me if im wrong but i would drop jet size to lean it and go up in jet size to make it richer right? that being the case why is you 310 using less ful/air mixture than my 261 if those jets are close? and dont the mikuni jets go by 5 unlike the keihn?

thanks for the info

Posted by: 250r rider 88

wow, robert at ESR got back to me within an hour, i almost had a heart attack, he said they jet all the carbs and it should be good to do heat cycles and then ill probally have to adjust the main jet from there, so im probally around the same main size as you mxracer by the time i get it fine tunes, i havent taken this carb apart yet, ive been told they require more tools and take longer than a ypical keign is this true?