Hey BB if when at idle even when its laboring its 850-950 rpms its a good idle....and if after a spirited run it is idling higher than 850-950 and staying higher its a sign of an air leak...dam Yami for not putting a tach on these bikes.. Like Musky said the bucking and backfiring sounds like either you need a longer warmup or you need to run the seafoam through her to clean her out before making adjustments to the carb...I am using the dynojet 175 main with the clip on the 4th groove with the pms out About 3 rounds ....I am thinking of going and getting a mikuni needle and a 170 and 167.5 mains to see what happens ...Coug <br><br>Post edited by: Cougar, at: 2007/04/01 05:52

I guess I wasn't specific enough last night(was very tired). When it feels labored, it seems as if it is running about 500rpms. If I'm in stop and go traffic, it'll do it nearly the whole time it's running.
Here's how it go's: (from stop to stop) Pull off, runs fine, come to next stop, pull in clutch, shift to neutral, bike runs lower with a labored idle. If I sit there for a little while(red light), it typically will &quot;find&quot; its right cadence after some time. If it is stop sign to stop sign riding, it's the heavy labored idle through-out.

I have run three cans of seafoam in the last 1000 miles. I also have double checked everything till I'm blue in the face. It never fails to run, and good at that, but I'm dealing with the 1 mile issue and the noticable idle deal.
Kinda where I'm at now!
.BB

Big Bear wrote:
Well, maybe your in bed, thats cool. I'll list the details.
Had her dyno'd, pleased with the results, Mostly. She does run lean at lower rpms (dips into 16 around 1600-1700,drops quickly to 14 at 1800,continues to drop steadily till it crosses 13(optimum)at 2450rpms, them is rich 12-12.5 till 4700 rpms)

Sounds a little like Curt's and he spend weeks trying to get the curve flat.

Stock carb with Roadhouse pipes, right?

All tuning should be done at stock rpm.

I'm running stock jetting as mentioned,so the needle is non-adjustable, but, could I not shim the bottom of the needle to raise it slightly to richen the bottom-end?

Tuning with the stock needle is very difficult, if next to impossible. It's not only the clip position that important, it's the shape of the needle. The stock needle it too thick (and tapered 'wrong' which means it does not allow an enrichment in the flow where you need it, which you noticed from your comment that ....

I still suffer from the 1 mile spit,stall,hiccup,backfire,etc.etc.etc. after inital warm-up for about a mile then it's gone. Tried pulling the choke for the last two days, and it appears to help, leading me to believe it is running very lean on a cold motor.Sound reasonable?(All this while riding it &quot;normal&quot

You are correct. You're lean in the midrange and you won't be able to correct it with the current needle. I tried slotting the stock at one time (you want it?) and found it still did not work. The shape of the stock needle is wrong once you start popping in different jets.

I have purchased a mukuni 180 to lower the main 1 size to reduce the rich top-end slightly.

Put the Dyno and jets in the drawer, put the carb back to stock and live with it. Otherwise buy a jet kit. But do you really want to rejet the carb until you buy an aftermarket filter?

The guys at my Honda shop (where the dyno is located) also suggested a softer spring in the slide for quicker response or perhaps riching the accelerator pump for a bigger shot of fuel off the bottom to compensate for the leanness.

???? The slide works through vacuum. That's why it's a CV (constant velocity) carb. You can change the shape of the slide which in turn affects the movement of the slide. The spring is used to hold the needle in place. If you loose this spring you can even replace it the a ballpoint pen spring.

Leave the accelerator stock until you have the other components tuned.

Have to go to HD for some stuff. Talk to you later (but not at midnight ).

Doc

Thanks Doc. She is all stock right now jet wise. And again, I wasn't specific enough. The spring I was referring to was the long spring between the carb cap and the slide. The guy I was dealing with seemed to believe that maybe a softer spring would get the slide &quot;up&quot; quicker at lower rpms where the vaccuum was the weakest thereby letting in more fuel.
BTW, how do you guys quote from different post and put them all in one? BB.

Hey BB

When you first talked about jetting or not with the stock box it sounded (to me)like you were going to swiss cheese the box. That's why I suggested jetting. How many and what size holes do you have? Doc's probably (usually is) right about a couple things. You might not have enough extra airflow to need jetting. And not at midnight. I re read the thread and I don't remember typing half the stuff I typed. I completely missed the spring thing too.

Us eastern standard time guys should be banned from the clinic after midnight huh?

The box is modified, 10 half inch holes.7 around the back, 3 in the front (toward front pipe).K&amp;N filter installed as well.Ported manifold. Stock jetting.BB

Us eastern standard time guys should be banned from the clinic after midnight huh?
My last post was at 12:59 my time. I had been up since 4:30 A.M. I wasn't at my best. Not that my best is all that good to begin with.


The spring I was referring to was the long spring between the carb cap and the slide.
The spring isn't very stiff to begin with but I guess anything is possible.


The box is modified, 10 half inch holes.7 around the back, 3 in the front (toward front pipe).K&amp;N
filter installed as well
Get a BAK. Use the needle and jets that come with it and life will be good again. Maybe

Well, I was afraid you were going to say that!
I should be shot for being so cheap, and I have just put off the buying of such an expensive farkle, but I guess that is not the best move.
I love the look of the BAK, how is it in the rain? How much POWER did it give you?
I bought a barons jet kit, installed it as if I was running a BAK (poormans), and got horrible gas milage. Horrible!(30mpg from 42)
Was that your experience as well? You are completely satisfied now?
I know, more questions that your wife throws at you on a daily basis, but hey, what are friends for?! BB.

Big Bear wrote:
Thanks Doc. She is all stock right now jet wise. And again, I wasn't specific enough. The spring I was referring to was the long spring between the carb cap and the slide. The guy I was dealing with seemed to believe that maybe a softer spring would get the slide &quot;up&quot; quicker at lower rpms where the vaccuum was the weakest thereby letting in more fuel.

Ah yes .... pre-coffee brain numbness syndrome .

If your still having problems with the pipes, drilled airbox, K&amp;N filter and stock jetting after adjusting the PMS we can see where the problem lies and the adjust.

I'd leave the spring alone for now. It's best to go with the simple tried and true fixes. It would still not fix the poor needle. On the other hand, if it's cheap, you can try it out. No harm done and it would give us another option if it does work with the stock needle.

BTW, how do you guys quote from different post and put them all in one? BB.

Just cut and paste whatever you want and the enclose it by quote and /quote in square brackets. Like ....

I need coffee

Doc

BB I think you bought my bike in a red version. I have had the same kind of problems from day one when I bought it. I had them throw in the windshield and pipes when I bought the bike. Rear cylinder plugs fouled at around 1000 miles and she wouldn't run. Later I put on a hypercharger and things really too a bad turn had to take it back 3 times to get the jetting done. They never really got it right and I got pixxed so I bought the BAK. Had the dyno done and have been trying for weeks to get her dialed in. She was lean and idle was always like yours. I did a shock treatment with seafoam and went from the 35 pilot to a 37 and now she is really running good. My PMS was out 6 -7 turns before and I even lost one. It is 4 1/2 out now and runs great. I think I could have even gone to a 40 pilot to get it in even more. Hope this helps.