Stumbly, is that a word?

[Guest]

My 80 1100 w/pods & a pipe stumbles at 2-3000 at a steady throttle. Running a little lean I think because if i apply a little choke it smooths right out. Stock needle is in mid position, 130 mains, 47.5 pilots.

Not sure what I should do, play with the needle height or raise the fuel level a mil or so.

Thoughts?

[Buffalo Bill]

It's your problem now?

My 80 1100 w/pods & a pipe stumbles at 2-3000 at a steady throttle. Running a little lean I think because if i apply a little choke it smooths right out. Stock needle is in mid position, 130 mains, 47.5 pilots.

Not sure what I should do, play with the needle height or raise the fuel level a mil or so.

Thoughts?

Hire the 1980 Suzuki racing staff to sort it out for you.
Or put in just as many man hours and money as they did, but on your own.

Sorry, I'm too harsh.

You need 2-3 sets of main jets in a range getting more rich by 2-3% for each set. Pull the carbs, install and test each set until you get the best performance. And that's what I mean about man hours?

There are many builders on this site who may shed some light on your tuning. Best of luck.

Bill

[Guest]

Main jet is primarily for wide open throttle. It's the small throttle opening that's the issue. I'm pretty sure it's needle or float level I need to look at.

[tom203]

Main jet is primarily for wide open throttle. It's the small throttle opening that's the issue. I'm pretty sure it's needle or float level I need to look at.

Me, I 'd opt for needle, but what kind (brand name) of pods, as some of the experts here aren't thrilled with some? Does it have a smooth idle when warm?

[Guest]

Good luck getting rid of a stumble with a stock jet needle. You can play around with it and see if you can make it less noticable but a Dynojet will get rid of it completely.