rebuilt carbs but not boggs at 4000 rpm only

[ronc650]

Hello, I have a 82 Suzuki GS650E. It is stock, It did not run, so I rebuilt carbs. it runs good now but at 4000 rpm it boggs. If I let off gas and go very very slow and smooth it will get up to speed. Also when I rev the engine while sitting still sometimes it will rev very high and sometimes boggs. but always at 4000 prm. Thanks for you advice.

[blowerbike]

did you re-install the air box and filter.. is it sealed up good?

[ronc650]

Yes, but I didi not have the original screws. It could be a small gap 1/8 at bottom. but it is all attached.

[Raven457]

Intake boots/orings?

[Steve]

It could be a small gap 1/8 at bottom. but it is all attached.

If there is stil a gap, it's not "attached".

How did you set your mixture screws? Might need to turn them out a bit.

.

[Skateguy50]

Intake boots/orings?

That is pretty much the range that mine did the same thing, new intake boot orings cured my issues.

Also as I learned from experience "rebuilt my carbs" could mean a HUGE range of things on here and might still required some work. It only took me 10 or so times to learn that lesson, good news is I am very good at removing and installing my carbs.

[ronc650]

The intake boots and o'rings are new. But I will fix the gap on bottom of airbox. I know what you meen abouth the carbs I have take them off and put them on several times. LOLThanks guys