cagiva supercity gearing **UP-DATE** X2

[befdelta7]

hi peeps,
does anyone know what the number of teeth are on the standard front and rear sprocket for the supercity 125? im getting a new chain and sprockets kit(the standard ones are completely knackered ) and want faster acceleration, so need to know the number of teeth of both so i dont order the same as standard.

also does anyone have any recommendations as to what size(number of teeth) of sprockets i should get to have faster acceleration? im not to bothered about losing top-end speed as i never do more than 75/80MPH and still have another gear to go anyway.

thanks in advance for the tips and replys
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Dont do a wheelie in front of a traffic copper... it gets you 3pts and £220 fine.

[Dischord]

It should be etched into the sprockets, give it a rub down with a wire brush if it's mucky! if not try counting them

If you want acceleration go a tooth down on the front and 2 teeth up on the rear, should do just nice
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2012 KTM EXC 250

Check out my vids - https://www.youtube.com/user/KTMSparky/videos

[befdelta7]

[cagiva gezzer]

Use the attached calculator.

opps - thats a six speed version, you've got a seven speed. You can alter it with the seven speed ratios.
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"because one stroke isnt enough and four strokes waste two"

[befdelta7]

iv looked around and all i can find are standard size front sprocket and 1 tooth bigger on the rear instead of what i want which is 1 tooth smaller on the front and 2 teeth bigger on the rear.

anyone know where i can get a kit for the supercity 125cc with 1 tooth smaller on the front and 2 teeth bigger on the rear and a chain to match included, or will i have to buy it all separate??

cheers for your replys
james.
____________________
Dont do a wheelie in front of a traffic copper... it gets you 3pts and £220 fine.

[sickpup]

43 tooth rear is the largest available. 42 is standard

13 tooth is standard front with an option on 14 tooth when derestricted.

[cagiva gezzer]

https://www.125ccsportsbikes.com/forums//index.php?showtopic=7223
____________________
"because one stroke isnt enough and four strokes waste two"

[sickpup]

According to my fitment list the Mito uses a different front and rear sprocket.

[cagiva gezzer]

They use differnet sizes depending on 6 / 7 speed or year it came out of factory. They're the same physical fitment. The planet can have a different rear on some.

https://www.biketorqueracing.co.uk/Final%20Drive/chains.asp another site for prices.
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"because one stroke isnt enough and four strokes waste two"

[befdelta7]

so what would you recommendations on sprocket sizes (number of teeth on the front and rear) be for quicker acceleration the traffic around my area on a daily basis is ridiculous so quicker acceleration makes more sense than going for standard gearing -- and its a change from the usual every day ride too
____________________
Dont do a wheelie in front of a traffic copper... it gets you 3pts and £220 fine.

[sickpup]

[befdelta7]

iv just counted my teeth on both sprockets and the rear is a standard 42tooth and the front is a 15 tooth

so fitting a 13tooth front and a 43tooth rear will be a substantial increase in accelleration...

my question is, is it wise to got for a 13tooth front sprocket judging by the 15tooth on the front which i thought was a 13tooth and would that make my bike rev out? i dont mind losing a little top-speed but surly this change will incur problems... or will it be fine?

cheers for your replys guys
____________________
Dont do a wheelie in front of a traffic copper... it gets you 3pts and £220 fine.

[stevo as b4]

id expect a 1 tooth drop in front sprocket size to lose you around 5mph, and sharpen the acceleration a bit. Id be very suprised if you need to drop more than 2 teeth on the front sprocket however.

Have you got the option of getting a rear sprocket with fewer teeth? If so, this gives you more scope to make small changes to the gearing, that maybe in between 1 tooth more/less on the front sprocket. Also if you use a smaller rear sprocket you will reduce the un sprung weight slightly too.

[befdelta7]

[Marci]

https://en.wikipedia.org/wiki/Unsprung_weight
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FAB-Racing MiniMotoSidecars - Back with a vengeance - F1 Class 2011...
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[befdelta7]

cheers for that Marci

from what i can understand about it, it means when accelerating a slight bump in the road could cause the front wheel to lift slightly. am i correct or have i not fully understood the meaning of it?

also any tips for fitting a new chain and sprockets:
any easy ways of doing it?
any particular part needed to be fitted first?
any things to watch out for when fitting or fitted and taking the bike out for the first time?

cheers for your replys boys!
____________________
Dont do a wheelie in front of a traffic copper... it gets you 3pts and £220 fine.

[befdelta7]