Sprocket gearing

[Guest]

1980 750E 16 valve. Am staying with 630 set up. Stock gearing is 15T x 41T. Question is, what difference would be achieved by using rear 42T? What effect on low end and high end or would there be much change at all in performance? Thanks.

[Steve]

You would almost not notice the difference.

For example: at whatever road speed would have the engine turning at 4100 RPM, it would now turn 4200.

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[GRAND ROUGE]

What Steve said. That said, dennisht, what might you be looking for re performance / gearing changes? Have you already purchased your 630 chain and sprockets? If you have not done so, take it from someone who waited way too long to change over to a 530 set up on 2-owned since new-1983 GS1100E's. Lots of great info re the advantages of converting from the 630 to the 530 set up.

[dennisht]

I know the weight difference in sprocket/chain size is desireable by some. Other than that and more choices of 530 products are nice. But I am building a cafe racer type bike from a very, very ugly and abused GS750 that putting back to stock form would not make financial sense. Cafe types have of course their own look and I prefer the look of the stock 630 set up, big and beefy, goes with my modifications I am making on the bike. Not looking for any great preformance changes since bike will be just used around town for fun. I have other bikes that are stock and are sport/touring types for serious riding and touring. Thanks for your input, I appreciate all the great help I get on this forum.