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General Category >> Rubber Side Down! >> Popping between 1st, and 2nd
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Message started by firsts40 on 10/17/07 at 18:44:31

Title: Popping between 1st, and 2nd
Post by firsts40 on 10/17/07 at 18:44:31

hey guys, and girls, when I shift up conservatively, I get some popping going from 1st to 2nd, and a little less going from 2nd to 3rd. Now once I hit 3rd and start rolling the throttle, she runs like H---. It runs fine at low end after she warms up, but also has a few burps while she is cold. It just started doing this recently. I can run my finger in the pipe, (of course when it has cooled off) and it comes out clean. It also seems to not have a constant idle, some times it seems to idle a little high and sometimes not. I am 100% stock.
??? ???

Title: Re: Popping between 1st, and 2nd
Post by skrapiron on 10/18/07 at 05:21:33

Perfectly Normal. ( and discussed repeatedly.)

The bike was set lean atthe factory. It's still lean.

You can eliminate the random pops and bangs by following the carb tuning guide found in the tech section.

For a bone stock bike, I would recommend what I did: Drill out the plug over the idle-air screw, add a 55 pilot, 147.5 main and 2/3 spacer mod (reduce its thickness by 1/3). Then set your idle air-fuel mix with the air-screw to get the idle smoothed out.

If you go to a K&N drop in, you will have to again adjust accordingly (55 pilot, 150 or 152.5 main and 1/2 spacer) etc.

It's actually a very easy carb to tune, once you get over the apprehension and you finally take a screwdriver to it.
Good luck!

Title: Re: Popping between 1st, and 2nd
Post by islandwahine on 10/18/07 at 10:05:30

firsts40 wrote:

hey guys, and girls,

That's sooooo sweet!
You included us girls! I think I'm gonna cry!!! :'(
Thank you :-*

Title: Re: Popping between 1st, and 2nd
Post by firsts40 on 10/18/07 at 10:22:14

Thank you Skrapiron, I thought it was normal, just never noticed it before.

As far as you Islandwahine, how could I leave out the ladys. Every thorn needs a rose.
;D ::) ;)

Title: Re: Popping between 1st, and 2nd
Post by vtail on 10/18/07 at 13:36:04

The idle variation is due to outside and carb temperature. You can keep messing with it, but just leave it alone :)

Title: Re: Popping between 1st, and 2nd
Post by T-Mack1 on 10/18/07 at 18:18:18

It's lean (I think you knew that though), your finger should come out with slight soot. Brown'ish gray to light gray. Just not black.

And, If you want to reduce popping, shift earlier.....smoother

Title: Re: Popping between 1st, and 2nd
Post by firsts40 on 10/18/07 at 22:43:15

Thanks for all the feedback. I appreciate it