Author Topic: esr 330 +4 tuning help (Read 4291 times)

aberegg05 · « **on:** March 23, 2014, 08:46:52 PM »

I have an esr 344. Boyesen rad valve race gas dome 01 cr ig and trx9b pipe. 39mm pj carb with a 182 main 60 pilot 2 turns out on the air screw 3rd clip from the top on the clip. Running 106 leaded mixed with klotz.

At 3/4-wot it runs great but from 1/4 to 3/4 she aint doing well. All she wants to do is sputter until I smash on it. Any and all suggestions would be appreciated.

havinnoj · « **Reply #1 on:** March 23, 2014, 08:52:46 PM »

Sounds like it's too rich on the pilot, needle, and clip.

Take a look about halfway down the page for more info on symptoms and remedies:
http://trx250r.org/threads/2770-Keihin-jetting-information

trx250scar · « **Reply #2 on:** March 23, 2014, 09:54:55 PM »

I am thinking your pilot should b around a 42

aberegg05 · « **Reply #3 on:** March 23, 2014, 10:12:24 PM »

42 seems a little small isn't it?

4WHLr · « **Reply #4 on:** March 23, 2014, 11:32:33 PM »

I would think 50ish would be closer. But, will it idle a while without loading up with the 60 in it? That dgh needle is pretty common and shouldnt be too far off either. That link havinnoj put up should help dial you in too.

Wolvman99 · « **Reply #5 on:** March 24, 2014, 04:58:11 AM »

i run a 55 pilot in my 344

rsss396 · « **Reply #6 on:** March 24, 2014, 08:11:08 AM »

What you need to fiquire out is if this is a lean condition or a overly rich condition, many people mistake one for the other.
It is always safer to increase fuel to the throttle position that is running bad, and if it gets worse then try leaning that throttle position.
Normally 1/4-3/4 throttle is influence heavily by the needle in the slide.

look over the info here
http://trx250r.org/threads/2770-Keihin-jetting-information

ccaiazza · « **Reply #7 on:** March 24, 2014, 06:01:48 PM »

If its lean it will run better with the choke on

aberegg05 · « **Reply #8 on:** March 24, 2014, 07:18:09 PM »

Deff. Not lean. I have to clear it out a good bit to take off

aberegg05 · « **Reply #9 on:** March 27, 2014, 08:18:47 PM »

I dropped my slow jet to 55 clip on 2nd. Main182 and breaks up at WOT almost revved out. Bump up my main?