Suzuki GSX650F Forum - www.GSX650F.biz

What is the average life one can expect? My bike is just over 19,000 kms and I think it's time for a new set.

With good cleaning, lubrication and adjustments I have gotten 20,000 miles or 32,200 kms out of chain and sprockets with no problems, depends how hard things are abused and not taken care of, and sprocket materials, aluminum vs. steel ect. just check the condition of your sprockets and chain, they will tell the story of what time they have left.. Later DaveG

OK, but is it fair to say that when replacing the chain, replace the sprockets as well?

Replace everything.

Thanks, Kadett. Will do. And I'm going to give the 16T a go in the front.

good move ... best mod i ever did

Just got a call from the mechanic and apparently there are no 48T rear sprockets around here right now. He can order one (1 week away) or I can go with a 47T in the rear.

Does anyone foresee a problem going to a 16T in the front and a 47T on the rear? Would that be too much? Or should I order the 48T and wait?

Your thoughts are greatly appreciated.

Excuse my igroance but what do we have stock on the rear sprocket (48 I'm guessing) and what would be the benifits/drawbacks of changing the rear sprocket up or down on tooth count?

my understanding is lower the teeth at the rear maintains high end torque .... 1 tooth lower at the rear is ( i think and Im sure someone will correct me if im wrong ) equivelent to 2 up at the front, i asked about this some months earlier and got jumped all over, going to a 16 on the front will correct the speedo and give you a drop in RPM at a true speed. I replaced the front only to a 16 tooth and this made the bike a lot nicer to ride around town and on the freeway.

Having said that i just replaced the front pulley on my cruiser (belt drive) and am changing the rear down 2 teeth, this corrects the speedo on it with the front, helps out the lower gears, both pulleys drop the rpm by a 1000rom @ 75mph and the rear maintains top end torque.

Sprockets are available from cheapcycleparts.com at this link.

http://www.cheapcycleparts.com/1-all-pr ... =Sprockets

If you are ordering from Canada, request US post/Canada rather than fedex / ups, this avoids "customs handling fees" of $50 plus which are BS ... there is no such thing charged by canada customs.


Good luck on what ever you decide. Cheers Maurice

Your math is wrong whiting57.

Going up 1 in the front is the equivalent of -3 in the back. We have a 15/48 ratio. Thats almost 1:3.
So going up 1 tooth in the front (16/15) is about 6% less rpm needed for the same speed. Going down 1 tooth in the rear (47/48) is about 2% EXTRA less rpm.

Because from the 48/15 you got 3.125 revolutions from the front sprocket to turn the rear wheel once
With 48/16 thats thats 3 revolutions
With 47/16 thats 2.93 revolutions.

So the bike makes even less rpm if you also change the rear sprocket to a lower size. I wouldn't do it.

AH, IF YOU RE READ THE POST, THE REFERANCE TO CHANGING THE FRONT AND REAR PULLEYS WAS NOT IN REFERANCE TO THE GSX, IT WAS TO MY CRUISER, MY PULLEYS HAVE A COMPLTELY DIFFERENT RATIO AND TOOTH COUNT TO MY GSX AS WELL AS MORE STUMP PULLING TORQUE THAN THE GSX COULD DREAM OF. CHANGING THE FRONT AND REAR PULLEYS ON A VN900 V TWIN IS 2 FOLD, AT 120KMS INDICATED THE REAL GPS/ROAD SPEED IS 112, 8 KMS OUT,
THE FRONT ZEROS THIS OUT AND LOWERS THE RPM IN ALL GEARS, CHANGING THE REAR DROPS THE RPMS EVEN MORE, I DONT HAVE TO BUY A NEW BELT BECAUSE OF A OVERSIZED FRONT PULLEY WHICH WOULD NOT FIT PAST THE ONE I HAVE, AND MAINTAINS HIGH END TORQUE. A 1000 RPM DROP AT 120 KMS/75 MPH TRUE ROAD SPEED ON THIS BIKE DOES NOT HINDER PERFORMANCE DUE TO ITS HIGH TORQUE NUMBERS.ITS A CRUISER, NOT A CROTCH ROCKET.
AS I SAID IN THE POST, ON THE GSX, ONLY THE FRONT SPROCKET WAS CHANGED, THE REAR WAS LEFT ALONE. THIS RESULTED IN THE SPEEDO BEING CORRECTED AND LOWER RPM AT A TRUE INDICTED SPEED. IE 100 KMS PER HR INDICATED BEFORE THE CHANGE ... LETS SAY 5 PERCENT OUT, REAL SPEED 95 KMS ... 6000 RPM..... WITH THE CHANGE, 100KMS PER HR INDICATED 6000 RPM, 95 KMS PER HR INDICATED ....5700 RPMS, HENCE AFTER THE SPROCKET CHANGE WITH REAL TRUE SPEED YOU GET A REDUCTION OF 300 RPM. IM SURE THESE NUMBERS ARNT ACCURATE BUT YOU GET MY DRIFT.

I ALSO SAID THE I BELIEVED THE REAR SPROCKET CHANGE WAS A 1 TO 2 EQUIVILENT BUT IF THE NUMBERS WERE WRONG SOMEONE WOULD LET ME KNOW

I, LIKE OTHERS AR NOT INTERESTED IN THE SCIENCE OF GEAR RATIOS, ONLY THE RESULT.

Wow capslock alert ! Well the outcome of the 'science' is what results in real life It was no attack on you btw.

Ouch! Don't yell.



I'd wait for the 48 rear... I think the 16 tooth front is the best mod I'm likely to do - I love it, but I wouldn't go further.

I'd stick with 16/48

If 1 up in the front is equivalent to 3 in the rear, then 1 in the rear shouldn't make that much of a difference. As Kadett points out, 47/16 is 2.93 revolutions. For the more aggressive and finicky riders, this might be a concern. For a guy like me who logs a lot of highway riding, I don't think it will be.

If anyone on here thinks that this would be a drastic move with dire consequences, please let me know.

Guess I cant help you, I find the stock sprockets a good combination and a thing I really dont want is less acceleration