1994 gsxr 750 no power in till 6000 rpms

Cant see why it wont fit as I think the frames are the same onlly the engine siz is different

Can be many things but most likely the problem is in the Carburation. Check synchronization, float level, main jets for clogs etc. Check cylinder compression and make sure all cylinders are in specifications. At least 125 PSI on each cylinder and 5 PSI difference max between all cylinders.

change the spark plugs and wires, thats what I did. 03 R1

carb needs to be takin apart and cleaned in solvent--jet may need to be better ajusted-that takes expertize--chec plug wires and ign parts for wear

you will need to undo the bottom hex , and the whole damper spring come out together

change the spark plugs 1st....

The carburetor jets, there are 3 bands; A low, mid range and high range rpms. 10k would fall in the Mid range power. I would let the bike warm up a little bit and tweak the middle knob on the left side of the bike and keep in mind you need the right mixture so turn it quarter turn one way at a time per testing the mid range rpms while riding, tweaking 1/4 turns in between tests. If it gets worse, turn it the other direction until you find that sweet spot in the mixture of fuel/oxygen. The carburetor jets, there are 3 bands; A low, mid range and high range rpms. 10k would fall in the Mid range power. I would let the bike warm up a little bit and tweak the middle knob on the left side of the bike and keep in mind you need the right mixture so turn it quarter turn one way at a time per testing the mid range rpms while riding, tweaking 1/4 turns in between tests. If it gets worse, turn it the other direction until you find that sweet spot in the mixture of fuel/oxygen. The carburetor jets, there are 3 bands; A low, mid range and high range rpms. 10k would fall in the Mid range power. I would let the bike warm up a little bit and tweak the middle knob on the left side of the bike and keep in mind you need the right mixture so turn it quarter turn one way at a time per testing the mid range rpms while riding, tweaking 1/4 turns in between tests. If it gets worse, turn it the other direction until you find that sweet spot in the mixture of fuel/oxygen.

Usually they take 3 1/3 qts. Just add 3 and watch till it full with the last bit of oil. Then start the bike and let idle for 5 seconds to fill the oil filter. Let it sit for a couple minutes and recheck the oil level and add more if needed.

You have two coils on the bike. I would start by checking the coil for the non working cylinders. Trace the spark plug wires back to the coil from cylinders 1 & 2.

Your carburettors might be out of sync. You need to measure the vacuum level of each carburettor, and ensure that they are the same.

I had similar problems, which were caused by a faulty ignition coil. It is also worth replacing and gapping the spark plugs, if this has not already been done.