More advice. I have been blasting around in my car, all is awesome until i try to cruise in 6th for any distance 3/5 miles. Engine seems to get bogged down it will clear my putting the clutch in and reving. Also had a Dentation any ideas?
Its zxr engine.

Also if i pur more preload on the shick springs to increase the ride height will i need to doanything to compensate?

Sounds like to much fuel, are the plugs sooty ? If so you could try dropping the needles by a notch in the carbs but first address basics, Fuel level in carbs and balance.

Also do you know if the donor bike had a full flow exhaust, air filters or both ? If so have these been carried over because if not the jetting may be out now if you have added restrictive items.

If you have wishbone rear suspension if you jack the back up the wheels will tuck in so you will need to tweek the rear camber, Dion of fixed axle no changes required.

help how do i chech the carbs?
i will change to plugs
The engine has been install for some years not do alot since it was put in tho(not installed by me)