Carb touch-ups?

[Unclesol]

After the installation of a new oil pan to repair stripped out drain plug, I finally got to take my 83 GS 750ES out for a real ride! The bike has a Supertrapp 4 into 1, and a K&N OEM style filter.
Once it is warmed up, the idle is fine, and it likes to howl once it gets above 4500 rpm. However, it does seem a lkittle sluggish in between. Any suggestions? Thanks.

[chef1366]

Jets

Do you have stock jets? With the 4-1 and the K&N you'll be running lean with the stock jets. Try lowering the jet needle one notch(actually raising the needle) This will help the leaness with 1/4 to 3/4 throttle. You judge what circuit your running on with throttle position, not RPMs. If your pulling well with full throttle then your main jet might be ok.

[Unclesol]

Thanks for the tips. I guess I know what I'm doing in the rain this week-end...

[Jethro]

If you don't have adjustable needles, you can shim with tiny stainless washers. Does it pull well at wide open throttle?

[Unclesol]

Yes, it does. Thanks for the tips on the washers. It still has the stock carbs, so I guess they should be adjustable...