WHen changing oil on a 2007 GSXR 750, how much Oil do I put In

This will likely be one of two problems
1....Your battery , even if it is showing 12 volts may be bad and not giving you the necessary cranking amps to fully engage the starter and turn the motor over
2....Due to getting wet your wiring is corroded and needs to be cleaned, especially the ground, and then remounted tight.
Try these and see if it helps

Yes, because it is a standard oil for generally all bike. if you bike is in very good condition then you also can use 10W30 semi synthetic oil for better performance. Good?

20w40 or 20w50 but importantly it must say four stroke motorcycle oil, car oils will cause the clutch to slip.
Synthetic oils are better but cost more

You left your petcock on, the fuel bowls over filled and the gas went into your crankcase

DON'T START THE BIKE WITH GAS IN THE CRANKCASE YOU WILL BLOW THE MOTOR.

Empty the gas, put in fresh oil, run engine, then change oil and filter again and you are done.

Change stator. Left side of motor. Its real easy to do. If your to buy a used one order the gasket from Suzuki first. Its going to take a few days. Also get all you need for the oil change also...due to the fact that all the oil is going to come out with the stator cover removal. . Suzuki can run a diagnostic on it for you as well.

if it turns over he might want to check there isnt too much oil in the case

remove the lower fering part...remove the nut and filter..put back the nut and a new genuine oil filter and put new oil...about 3.7l

First, drain the gearbox oil and put fresh 10w40 oil in it along with a new oil filter. . Ride the bike for a day then change the oil again. The filter doesn't need to change again. This should flush out dirty, gritty oil driving the clutch plates. Replace the clutch cable. It is probably the original and lacks lubrication.

This will probably take care of the problem.
Please rate this solution. Thanks!

The oil can be drained removing the NEAS system valves ( 2 allen bolts ).
System contains 456 cc ( 15.4oz.) oil in each leg.
the oil-level measured from the top of the COMPRESSED leg is 107mm.
To measure:
- have an oil-suction pump
- Make a tube with a stopper at 130mmfrom the end.
Drill a little hole ( 3mm ) at 107mm (4.21in) of the stopper.

More oil will tighten the suspension, less will soften it a bit.
Oil type: SAE15

Hope this helps

nope i have the same system and you have to unscrew the oil line and then you make sure the filter stays open end up and slide it out the right side..easier to take out then put back in ..ive changed my oil twice and both time its a pain in the %&#!₪to put back in but it does go on without removing the headers