Low float symptoms?

[corey]

As some of you know, I've been fighting with my carbs. Upon the advice of TC and others, I lowered the fuel level in each carb. However, I think I went too far. So I must ask: what are the symptoms of fuel level being too low?

You see, with the new fuel levels, my bike starts and idles super smooth. Even after only bench synching, it idles smooth. When the engine is under load, however, it pops and sputters from the pipes and the carbs. Only after about 3000 rpm does it kick in and run with power, though still sputtering slightly.

I'm almost certain these ailments are from the fuel level being too low. But why does it gain power after 3000 then? I realize thats when the needle starts to flow more, but how does it flow more if their is no fuel to flow?

My plugs are towards the whitish side, however, which reaffirms my suspicion of a lean condition.

Would out of synch carbs cause problems like this? I have only bench synched them, remember.

[mro]

3000 and above have transistioned to mains.
Below your on the idle/pilot circut.
Where be the pilot screws set at?
and what setting of the floats?
White plugs be lean...


mro
float level affects all rpm ranges
when straying from stock float settings should try but a 1/2 mm at a time.

[corey]

I have the pilot screws set at 1 1/2 from lightly seated.

As far as adjusting the height, I wasn't sure what to go with. I have 80 carbs, so I set the height to 23mm. But that ended up being super rich. So I then went with the earlier float setting of 25.7mm. I guess I should have stepped it up incrementally, like you suggest. So too low floats can cause these problems while still providing a good idle, right?

[TopCatGr58]

Hey Corey,

Okay, you went whole hog and set the floats at 25.7mm!

But first, how does it behave at WOT, or up to redline? Can you take it to redline without hesitation or feeling like it's falling on it's face when you get near redline, or does it feel like it would easily keep pulling past redline?

IF it feels strong up to and wanting to go beyond redline, then your mains are the right size, and the float levels aren't too low for them. SO...you could just try turning out the pilot screws a 1/2 turn each, and test, then perhaps another 1/2 turn if still hesistating. But folks will say that IF you reach 3 turns out, and still not responding well, then you would either need larger pilot jets, OR you might decide to go back in and readjust your floats a little higher!? YMMV!
T.C.

[mro]

For the 80 carbs I'd go back to the stock float setting, synk carbs and then do as TC suggests.

If it seems to run good then re-synk carbs.
Check out the tech tips for reading plug color and do a few runs around 4500/5000 RPM which is highway speeds.


mro
BTW
I don't remember do you have a stock exhaust and air filter?
If not...