I'm running a single 44mm lectron on my 686 and I am having trouble tuning it in right. It runs pretty good up until about 3/4 throttle, but if I open the throttle all the way it completely falls on its face. I'm running a 9-2-xl needle and a 35 powerjet right now. Can any of you lectron guys give me some tips on how to tune this thing or what setup you are running.

 

Its probly the PJ, Try a 75-100 PJ.. Its probly lean on top. If that dont work, try to pinch the PJ line and try to rev it out, If that dont work and it still bogs then your lean on top. If a bigger PJ doesnt work, then you have the wrong needle.

 

I wish i cold help but give me a week or so and i can help alot more, it's alot diffrent then the stockers..

 

also what mario is talking about is a good starting point, thats what we did to mine and it is super rich up top, fell on it's face at dumont but the low end was all hell..

 

I ran a bigger powerjet and it still did the same thing. I think it is rich up top, I'm going to go buy some more jets tomarow. I will try oinching off the powerjet once and see if that helps. What needle are you guys running?

 

We are running custom horsepower research needles. I had the same symtoms you had and it was cause I had the wrong needle at first.
You want your bike to idle nice and cool, If it gets hot and lean on the bottom, Try to richen your needle.. I am willing to bet your needle is not deigned for your motor.

I run a lectron hv 48/50 w/ 130 pj.


Or crimp the line and richen needle up.


Sam, I would try a few different needles when @ the dyno, The one you had was close, but not perfect.

 

ANNIHILATER, Does Horsepower Research have a website? And Are you running Gas or Alchohol?

 

Gas, Did you pinch the pj line... If that doesnt work, try to take pj completly out.

Lean on the top end will give you the same symtoms of being rich. Believe it or not a wrong needle can sometimes make it to where you cannot get the motor to rev out like it should, no matter what PJ..

 

HPresearch

I think your too rich on top. Thats a pretty rich needle for gas. Try closing the pj off.

JMO

 

Thanks Ward. I'll give that a try as soon As I get a Chance. I guess I'm gonna have to break down and buy a different needle.