Downgearing (zxr750)

[Pie-Roe]

Hi workshop knowledgeables.

I would like to downgear,(at least I think it's downgearing) my zxr750, to give it better acceleration.

If I remember rightly, to do this I need to either go down 2 teeth on the front, go up 2 teeth on the rear, or do 1 down 1 up?

If this is correct, could anyone point me in the direction of where I might purchase such a set of sprockets.

Cheers
Pyro
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[Whosthedaddy]

www.wemoto.co.uk would be my best bet.

There is a science to it...(but I completely had a spack attack, sorry)

[Kickstart]

Hi

Bigger rear or smaller front will give more thrust for the same gear / speed. And hopefully more acceleration (or much of the time you could just sit in a lower gear).

Very rough rule of thumb is that one tooth down on the front is the same as 3 up on the back (as most bikes run a rear sprocket that is about 3 times as many teeth as the front sprocket).

If you chain is pretty new then you will probably get away with changing one tooth and maybe 2. Smaller front probably means you use up more of your chain adjustment, but a larger rear probably means that you will not be able to move the rear wheel far enough forward.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[Pie-Roe]

I see I see.

I don't mind it being very easy to wheelie, but I do mind it being hard to keep the front on the ground.

What would you reccomend,and is the wemoto website working for you? It says page cannot be displayed for me I'm thinking 1 down is probably the best bet, both chain and sprockets are about 1k old.

Pyro
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[Kickstart]

Hi

One down on the front and one up on the rear would make a fair amount of difference and the change in chain length would be nominal.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[Pie-Roe]

[Kickstart]

Hi

Expect you could get it for a lot less than that. Presume that price is using an alloy rear sprocket. Steel one would probably halve the cost (and last longer).

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing