Front sprocket alternative

[bryan88]

I an toying with the idea of going to a 17 tooth front sprocket. Problem is, it may be hard to find one here in SA. does anyone know if one from a different bike fits? Thanks.

[Jim Knopf]

Servus,

look here: http://www.ebay.com/sch/i.html?_odkw=sprocket+gs+500&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313.TR0.TRC0.H0.Xsprocket+gs+500+17t&_nkw=sprocket+gs+500+17t&_sacat=0

[bryan88]

Thanks, seems a yz250 one might work

[Big Rich]

When I was researching for a sprocket conversion for my GS450, I spent a lot of time on JT Sprockets website. It was pretty easy to cross reference dimensions and part numbers.

[Dirtbox]

Does anyone know if fitting a 17T sprocket really makes any noticeable difference.  The torque at the output shaft will be much the same as a 16T sprocket and the effect on RPM and potential top speed is marginal.  5000 revs vs 4700 and 106mph at the same rpm as 100mph with a 16T sprocket.  Small engines like the GS500 get most of the power from RPM not torque so it could have the wrong effect.  I recon that peak power on a GS500 is at about 8500rpm before there is a fall off and that would be at circa 106mph.  So its hard to say either way from a theoretical evaluation so I would also be keen to getting the opinion of those that have done the mod.  Is there some advice available

[Alan_nc]

Well I'm not sure what your experience has been but....I felt that I was having to rev the engine to much and slip the clutch to get off the line (just start out from a light).  This is with the standard 16 tooth.  I just got the 15 tooth that I ordered off Ebay ($16.00 delivered).  If it warms up I will install it this weekend.  If this partially solves the problem I may even try a 14 tooth.

[CraigR]

I've been running a 15T for 6 months it's great, of note with the 14T you'll most likely need to shorten your chain.

I just put a 14T on, on the weekend had to know 1 link out.