What does it feel like when a spot is rich or lean??

Move your needle down another notch (toward the point). The DJ instructions are close but the needle is never right. Really you need to move it down a notch and then stack one more thin washer on top making it effectively a half notch down) but a full notch will be ok. Won't be perfect but a little rich is better than a little lean at WOT

It sounds like your needle, but you must select the proper main jet first, which requires either a wideband such as an LM-1 or LM-2, or plug chops. Once you get the proper main jet, then you can tune the needle. If you do it the other way around you will be in there again once the main jet is correct to readjust the needle.
AFA lean vs. rich, it's more of a feeling while you are riding the bike, difficult for me to describe.

Are your airbox and exhaust stock and leak-free?

Running K&N Pods, 4-1 Mac exhaust, Dynojet III jet kit installed as recommended (165 mains, Needles 3rd slot from top, 4.5 turns on Pilots)...

Just completed a valve adjust and carb balance, both of which made a nice difference, but this issue still remains as it was before I completed those. Checked all the plug wires and they are satisfactory. Exhaust header temps are all even after a ride.

I'd think maybe ignition, but it's very throttle position sensitive... it only happens at 1/2 throttle and up... Which is why I thought it might be needle setting.

So, am I correct in hearing that if it's lean, it'll just kind of lay over, but if it's rich, it'll "flutter" and stumble...???

[niclpnut]

Kinda hard to describe a feel/sound but if overly rich its kinda wet and rythmic, while lean is dry and flat.

If you are at high rpm/high gear, snap the closed and open hard. If it bogs and rpms drop then raise its probably rich.

The factory pro guide explains things really well.

Nic

Are your airbox and exhaust stock and leak-free?

Hi,

Are there any modifications to the intake or exhaust? It sounds like you need a bigger main jet, but that's just a seat-of-the-pants guess. Plug chops will tell you more.

Have a look at this article:

http://www.factorypro.com/tech_tuning_procedures/tuning_carbtune,CV,high_rpm_engines.html

Thank you for your indulgence,

BassCliff

[Darin Jordan]

Hi Guys... Hope everyone is having a great 4th of July weekend.

I'm still chasing down what I believe is a jetting issue with my 850... I'm to the point where I'm pretty sure it's carb related.

Same story... Bike runs great at idle... cruises nicely, etc... Full throttle works great, right up to around 5500 RPM, then it stumbles and never really clears up. If I I ease up to that RPM and don't open the throttle up that far, then it'll pull pretty well until around 8000, then it'll start stumbling...

Sounds like needles or main jet (or combo of both) to me, but I need to understand which direction to go. I'm having a hard time finding a place to do a chop, but will here shortly.

In the meantime, I would like to know... WHAT does the bike feel like when it's rich, vs. what would it do if it were lean?

I've very close to having this solved, but just need to know which direction to go.

Thanks,