Countershaft sprocket vs rear sprocket?

[FlangMasterJ]

If I was to drop one tooth on the countershaft sprocket is that equal to roughly three up on the rear?

My 660SMC is currently geared to do 1,000,000 km/h. Seriously having trouble coming into slow corners. Second is way to low and first is way to high. I'm thinking going down one tooth on the front will allow me to be in the meat of second.

Any ideas?

[MSTRS]

1:3 was always what I was told. I guess it depends on what the bike originally came out with...

[FlangMasterJ]

1:3 was always what I was told. I guess it depends on what the bike originally came out with...

The stock gear ratio is 16:38. So to save myself getting a new chain I think I'll drop the front to a 15.

[vifferman]

That's OK(ish). You may end up needing a new chain and sprockets anyway, as going smaller on the front sprocket is a recipe for accelerated chain wear, due to the chain having to negotiate a tighter turn. Cheaper than going up 2 or 3 on the back, but.... perhaps not in the long run.
Having said that, I've gone down a tooth on the countershaft sprocket on the last three bikes (17 to 16 on two, and 16 to 15 on one).

[GPS MAN]

Alot easier to change the front than the back.....

1 to 3 is usually the ratio.....
Good Luck

[Gremlin]

Technically I think its 2.4, but yeah, 3 is the accepted number.

As vifferman says, it will increase wear, as less teeth on the front do more work, so the sprocket lasts less. If you follow the thought of changing the whole kit out every time, then you'll be changing more frequently, and the front is harder to keep an eye on.

Personally, I'd go up on the back instead, and it also increased swingarm clearance...

[pete376403]

2.375 (38 divided by 16) so almost closer to 2:1

[Phreak]

I found this (http://www.gearingcommander.com/) link a while ago, has most bike models pre-loaded so you can adjust your gearing and see how much it'll affect your speeds and such.

[Pixie]

That's a pretty cool calculator