My 02 gsxr 750 is making a ticking noise at top end of each gear but it don't do it when in neutral. And the ticking gets faster and slower with the motor.

If the drive is larger to smaller the opposite pulley will turn faster, this will require more power. If the drive is smaller the opposite pulley will be slower, requiring less power.

Replace both front wheel hub bearing assy's

Hey Tom, .. OUCH.. sounds serious..FIRST - STOP "hot rodding" this bike. especially in the lower gears!! Now- the gears have "dogs" on the sides of the driven gears and on some of the wheel gears, and holes in the other wheel gears..(wheel gears are the non-drive gears - thats why there are 12 gears in a 6-speed transmission). This sounds like the dogs are on their last bit of "bite" (the dogs engage each other or the dogs insert themselves into the holes of a wheel gear).. once these dogs start to wear, they wear out faster and faster. ALL the transmission gears are "case hardened".. the outer .040" - .065" of the gear are "case hardened", the internal area is left softer(teeth too)..If they were HARD all the way through, they would be too brittle and shatter!! (I could tell you A LOT about more how this is accomplished and why - but just know this is the way it is!) Once the hardened area is worn down,, failure is imminent.(and much more expensive that repairing a NON-BLOWN-UP TRANSMISSION). The gears must be replaced as sets(usually the driven gear and wheel gear)..THEY MAY NOT BE EACH CALLED FIRST GEAR!!. THIS IS A JOB for a FACTORY TRAINED QUALIFIED PROFESSIONAL , - WITH EXPERIENCE!!! Or else you MIGHT have trouble in the future or spend money when you do not need to!! Sorry to tell you this... but it happens when your bike has been rode hard!! (its not uncommon!)

2000 2003 Suzuki GSXR600 GSXR750 GSXR1000 GSXR 600 750 1000 HAYNES REPAIR...

https://haynes.com/en-us/suzuki-gsx-r600-01-03-gsx-r750-00-03-gsx-r1000-01-02-haynes-repair-manual

Check sidestand and clutch lever lockout switches...

The ticking noise, if related to your engine would get faster and slower "with" your engines' RPM. If it isn't matching the engine then I would be wary of a possible wheel bearing getting ready to take you for the U-Turn of your life! Try pulling (very hard) on the top of the tire closest to that area to see if you can feel looseness or "play" ...cuz there shouldn't be any "play" or noises at all.

Your shifter cam bolt has backed out, this is a common problem on earlier GSXR's. Happened twice on my 2000, both times during race weekends.

Stop riding the bike and shifting at all and do the following repair:

Remove clutch cover - you'll drain some oil so make sure you have a drip pan underneath

Remove the 5 the clutch housing plate bolts - careful as they have pretty stiff springs behind them providing torsion

Remove all the clutch plates - make sure you keep the same order and re-install the same way; matter of fact if you have never replaced your clutch plates, do it along with this repair.

Once the clutch case is basically empty, you will see at the lower left a small assembly that looks a bit like a tuning fork, at the end of the shifter shaft. There is also a cam there with rounded cogs. There is a 8mm or 10 mm hex head bolt that holds this cam, and I'm sure it has backed out and is causing the cam and shifter to not engage the gears properly.

Remove the cam bolt. Spray some compressed air or even a light spray of brake cleaner in the threaded area where the bolt you just removed is. Make sure the threads are clean and dry.

Place the cam bolt and assembly back in its position, and take some RED loctite to the shifter cam bolt threads. Make sure to torque the bolt to specifications, I think it's 24 or 28 nm.

Let the bolt set for 24-8 hours, then reassemble the clutch and replace the clutch cover gasket. Top off the oil and go riding.

I would check and adjust the static ignition timing as if too far retarded it will tend to misfire at mid range revs. and suffer from lack of power at the top end.

you can change the sprockets.If you go to a 16 tooth front sprocket. two teeth on a front sprocket is like droping 4 teeth on the rear. You could drop 2 teeth on the rear sprocket but a 43 tooth is probably harder to find. the usual choices for front are 14,15,16 tooth.
For the rear they are 44,45,46 tooth

The way to remeber gearing changes is on REAR sprocket is smaller=faster and larger=slower top end.
the FRONT is OPPOSITE to the rear smaller=slower and bigger=faster.
You may have to lengthen or shorten the chain depending whjch way you go.

Contrary to what the speedometer might say (and GSXR 750 owners), a 2008 GSXR does not have the displacement to reach 180mph. A road test conducted in germany had a rider reach 181mph - or what said 181mph on the speedometer - but was actually clocked on radar going 173mph. 173mph is what a GSXR will reach at around 1200 feet altitude and 65 degrees fahrenheit. Depending on the altitude and temperature, you might have slight fluctuations. If you want to go 180mph+, just get a GSX1000R