sprocket sizes

[jamesynsr]

right, me and my mate was having this massive argument as i am wanting better acceleration on my nsr and i said its a bigger back 1 and a smaller front 1 but he says its the other way round, (i thought it was a bigger back 1 as if you look at all the off roaders like cr250 etc they all have massive back 1's)

can anyone settle this?
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nsr 125

[SoND]

Bigger back or a smaller front.
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Go back to bed - You have no rights - "Streetfighters ~ Mainstream motorcycling's crackwhore sister."

[benc]

yea a bigger rear and smaller front sprocket will give you better acceletation.

[instigator]

I'd personally jsut get a larger rear sprocket in my opinion. After reading some technical waffle about the arc's of the sprockets and chain wear, I would be inclined to think that a larger rear sprocket will increase chain wear LESS than a smaller front sprocket.

Can anybody back that up with some technical 'waffle'?

[pipnet11]

yup either increasing the back sprocket or decreasing the front will make the gearing lower and acceleration quicker, but sacrifise top speed.
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I love the girls that do, I hate the girls that dont, I hate the girls who say they will and then they say they wont, but the girl I like most of all and I think youll say Im right, is the girl who says she never has but looks as though she might. - Max Bygraves

[riichy]

so if i go a thooth down...on a bike it makes it faster top end then..?
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.......... PLOD ............ zx636 2004

[Black Knight]

Three on the back is about equal to 1 on the front.

For example, if you lost three teeth off the back and added 1 tooth to the front sprocket they would cancel each other out.

[mchaggis]

[BanditsHigh]

For anyone that wants to see the difference changing the sprocket sizes will make ... try my handy little RPM to MPH/KPH spreadsheet.

All the best ... Barry