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-   -   Rear sprocket size? (http://forums.sv650.org/showthread.php?t=116405)

olden mgroin 26-08-08 10:19 AM

Rear sprocket size?
 
hey all, don't know if this has been posted before, but would like to know how many teeth on standard rear sprocket, and does a larger sprocket give better acceleration. (just lookin for a cheap mod).


any help appreciated.http://forums.sv650.org/images/icons/icon14.gif

Stu 26-08-08 10:40 AM

Re: rear sprocket size
 
44T for your faired bike
45T for a Naked

Yes larger rear sprocket will increase acceleration & reduce top speed

Alternatively std front sprocket is 15T & the opposite smaller front sprocket will increase acceleration & reduce top speed - it will have 3 times the effect, or equivalent to going up 3t on the rear.

You can always do both, just watch out chain lenth, eg 14T front would have no effect :smt102 but 47T rear would need more links
HTH

olden mgroin 26-08-08 10:43 AM

Re: rear sprocket size
 
how much reduction in top speed are we talking, will it still pull 100+?

Stu 26-08-08 11:08 AM

Re: rear sprocket size
 
Blue worked it out as 127 revs per tooth & I reckon one more tooth on the front reduces my revs by 500 in top.

So say your top speed now is 135 at 11,000 revs 3 Teeth up on the back would be 125 at 11000 revs (but maybe the engine will have enough power to rev higher as you are going at a slower speed?)

olden mgroin 26-08-08 11:31 AM

Re: rear sprocket size
 
thanks stu very helpful, larger rear sprocket for me then.

Mr_Chin 27-08-08 08:57 AM

Re: rear sprocket size
 
I read about changing the front sprocket in this months RIDE magazine, and they say it will make a considerable difference. Has anyone on the org actually done this, and is there a big difference in the pull off? would I need to do the reverse of more teeth on the rear - by shortening the chain with this mod?

I assume this mod is like putting lighter rollers in the variator of a scooter, thus giving higher revs and giving more bite? It's nice to read about things like this, but I'd prefer 'hearing it from the horses mouth' so-to-speak.

Chin

BillyC 27-08-08 09:21 AM

Re: rear sprocket size
 
Quote:

Originally Posted by Stu (Post 1605197)
Alternatively std front sprocket is 15T & the opposite smaller front sprocket will increase acceleration & reduce top speed - it will have 3 times the effect, or equivalent to going up 3t on the rear.

Just a bit of due warning about doing this - reducing one tooth on the front sprocket greatly increases the wear on the chain, and front sprocket - and therefore the rear chainring as well.

leegriffiths128 27-08-08 03:05 PM

Re: rear sprocket size
 
I changed the rear sprocket to 46T......can't say I noticed a discernable difference in acceleration. However, I preferred the way the bike rides with the standard sprocket if that makes any sense. When the 46T wears out, I'll be dropping back to standard I think.

Probably everyone else on the org will disagree with me though.....horses for courses and all that :)

Sideshow#36 27-08-08 05:15 PM

Re: rear sprocket size
 
1T up on the rear is hardly noticable! I'd go to a 14T on the front for any noticable difference, and the wear isnt that much faster than the standard 15T. I depends how well you look after your chain too.

leegriffiths128 27-08-08 06:41 PM

Re: rear sprocket size
 
46T on a pointy is two teeth up aint it :confused:


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