20 Most Recent 2016 Suzuki GSX-R 750 Questions & Answers

Question edited for clarity. Question moved to model category. A C42 is an error in the ignition system that uses a 100 Ohm resistor to prevent hot wiring the bike. The usual problem is a connection to the ignition switch gets loosened or broken so the resistance value is greater than 100 Ohms.

C42 Error Code: Exhausted Many Options - StromTrooper

.. Lots more here. It is a known issue https://www.google.com/search?q=2008+Suzuki+GSX-R+750+C42+code ..

I would normally it is probably stuck, but the starter motor doesn't have the normal bendix on a spiral grooved shaft. It looks like it is permanently connected. I tried to see if there was some type of starter clutch behind it, and there is. It should release when the starter stops spinning.

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First impression was why would anyone rev their motorcycle to 9 grand in neutral? I could see if you were in gear clutch pulled and ready for a "drag" or Race Start but in neutral?

Anyway I can't hear it so if the sound is like it hits 9k and starts popping then two things either an over rev limiter which I doubtr because the engine red lines at 13,500 OR you have a set of spark plugs breaking down under load

youll need the service manual for clearances and to find out if it has shims to create lash settings

Hey.. its TIME for a trip to your local QUALIFIED PROFESSIONAL to evaluate you problem, this COULD/IS be serious!!!!

This may help: http://www.rtmperformance.com/wp-content/gallery/1991-gsxr-750-build/1991-gsxr-750-wiring-diagram.jpg

Sounds like the drive from the gearbox not connecting or the clutch not releasing.

check your pick up coils

switch coils around to verify which ones are good

depending on the year it is in the fuel pump which is the bottom of the gas tank

check list , plugs , points , valve clearances , old fuel , slipping clutch

Clean carbs check for spark check that all your vacuum lines are in good shape and check for compression

Sounds like You may need to look at a few things,[1] Check Your fuel filter[2] carbs may be full of dirt[3] check for vacuum leaks[4] carbs may need to be re-synced[5] possible carb rebuilding time