Missing At steady speed

[beast30]

I just had my 00' husky in for a dyno tune, to see if i could correct any missing that was accuring. At slow speeds, around 35-45 it misses. Its a slight miss but still a miss.

I did the carb cleaner check on the intake gaskets for leaks and it checked good. The guys at the shop said the timing was right on and the jetting looked good (they only adjusted the accel pump and air mixture a little).

I plan on dropping the bowl tom. and checking the inter jet along with the others for clogging.

Is there a good way to figure out if you have an exhaust leak?

if I remember right, all this sort started when I changed pipes last year And perhaps i didn't get the new pipes seated correctly. Went from sampson rip saws to VH big shots staggered. oh yeah and I'm running a stock super G.

Any help would be great.

 

[dogvet]

:zz2cents: Typically, an exhaust will make the bike tend to backfire out the pipes. Best way is just to remove the pipes and replace the exhaust gaskets. If you over torque the exhaust flange nuts, you'll cause the gasket to protrude into the exhaust port and the bike will loose power by the gasket disrupting exhaust flow (turbulence in the port). I've seen guys spend thousands of dollars on head work only to find that the bike doesn't run anybetter bacause of a couple of dollars worth of gaskets.:2thumbs:

 

[Gas Man]

When you say missing... does it loose power for a second and then come back?

Super G?

What RPM?

2700 ish?

 

[lee]

might just be you need a new set of spark plugs

 

[beast30]

Yeah i would say it happens around 2500-3000 rpm.

It doesn't lose any noticeable power, but i can hear it popping through the pipes. Then also when I'm warming it up, I try not to pump the throttle, to help minimize using the accel pump. So I roll on the throttle gently and put the friction lock on to warm it up. Usually put around 1500 -1800 rpm while warming it up. And while it warming up it is very pronounced.

So I couldn't take anymore and dropped the bowl last night. Everything looked good, blew everything out just to be safe though. I used that compressed air for dusting off your computer and such, worked kick ass. Anyways the only thing i did find out of the ordinary was the vaccumm cap on the top of the intake was completely dry rotted out. So my next question is, is what is that vaccumm nipple for? Obviously not for our application, possibily for an H-D or something?


Lee- I changed the plugs out quite a bit. Even thought it was brand. So i recently changed from NGK to Champion. Still no difference. I seem to change the plugs out alot though. They always tend to foul up. If i don't let it warm up for a good 5 min before going out it will foul the plugs 5 min down the road. I don't use the enricherener any more from all the stuff i read here. 1 -2 throttle pumps.

Dogvet- I'm definetky going to check that out. I spent the extra money and bought "james" exhuast gasket versus the traditional cone style becuase of the same thing you were talking about. But still i'm going to take a look.

 

[Black Dawg]

I just had my 00' husky in for a dyno tune, to see if i could correct any missing that was accuring. At slow speeds, around 35-45 it misses. Its a slight miss but still a miss.

I did the carb cleaner check on the intake gaskets for leaks and it checked good. The guys at the shop said the timing was right on and the jetting looked good (they only adjusted the accel pump and air mixture a little).

I plan on dropping the bowl tom. and checking the inter jet along with the others for clogging.

Is there a good way to figure out if you have an exhaust leak?

if I remember right, all this sort started when I changed pipes last year And perhaps i didn't get the new pipes seated correctly. Went from sampson rip saws to VH big shots staggered. oh yeah and I'm running a stock super G.

Any help would be great.

Your intermediate jet is too lean.

 

[beast30]

Dawg- I have a 295 in there right now So maybe move up to 031 which would be the next inter jet up?

 

[Black Dawg]

Yeah, the .031 should do it. I'm using a .033 but I've got other mods too. You'll have to go thru the retuning steps once you install it. Someone around here has a pdf file from S&S that describes the process.

 

[Thumper]

Just lift your enrichner a little bit a the time of the "miss" and that will confirm what sounds like a standard intermediate lean condition.

 

[Gas Man]

Your intermediate jet is too lean.

That was my first snap judgement but wanted more info...

Be sure that when you dropped the bowl you didn't loose or not put the o-ring back on the nozzle. You can see here in this pic, they like to come off when you drop the bowl. See the blue o-ring in the pic under the gasket.

 

[beast30]

thanks guys for your input!!

I ordered up a .031 & .032 to be safe. In the meantime went out for a ride the other night and about 10 min in the ride the ol' girl quit on me. it was like I turned the ignition off. So when this happened it acted like it ran good then off then on then off then off.

I let it set for a few min. then it started up fine ran for another 6 min then the whole process over again. I let it sit and all back to normal.

So I ended up ordering a new cam sensor. But H-D is back ordered until july 11th, so i ended up getting one thru my stealer thru drag specialities. So i'm waiting on that. so I'll have to see.

 

[Gas Man]

I'm not sure about the older Husky's but could you be having a vacuum lock due to your gas caps?

If that is even possible with yours... & Sinse it isn't leaving your stranded... take it for a short spin... next time it does it... see if it will restart right away. If not, open your gas cap, wait 30 secs... then try. It may be the gas cap. This is a common problem with many of the say... 2003+