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Offline DetourPhil

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15t front sprocket
on: December 11, 2013, 02:33:23 PM
I have just fitted a front sprocket that's 1t smaller than stock to reduce the gearing slightly.
So far, I'm very impressed - top gear roll on feels quite a bit more responsive than stock :)

Offline leathers999

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Re: 15t front sprocket
Reply #1 on: December 11, 2013, 07:37:26 PM
Jeez!! without my glasses on I thought it said 15ft Sprocket!!!!!  :005:

Offline Jimmy.S

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Re: 15t front sprocket
Reply #2 on: December 13, 2013, 09:23:00 AM
I did the same with my old vfr -99 and the difference was great, The old vfr was a Little bit hard to drive in low rev´s (under 3000rpm)but with one tooth less it was a big improvement and acceleration was great :007:
Thinking if I will do the same again with the CR





Probably  :164:

Offline markey29

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Re: 15t front sprocket
Reply #3 on: December 13, 2013, 05:47:10 PM
Hi DetourPhil,

Has this affected the true speed (mph) as I assume the speedo will not be accurate now with the gearing change, also did you fit the new sprocket yourself, and was it easy to do, and did you source it from a UK supplier?  I am assuming the existing chain was ok for the new sprocket in terms of it's pitch. Lots of questions, but I am thinking of fitting a 15 Tooth front sprocket to my bike also.


Offline DetourPhil

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Re: 15t front sprocket
Reply #4 on: December 13, 2013, 10:36:29 PM
Hi Markey, the speedo is fed from the abs so is unnafected by gearing changes,
It's easy enough to swap - undo a few 8mm head bolts on the clutch slave cyl & cover & move out of the way. Slacken the chain, Undo the 14mm head bolt & pull the sprocket off the shaft.
Replacement is the reverse.

I purchased a cheapy one but after I know I'm happy with it long term, I source a better quality item - ideally a Honda one if available or Renthal etc.

Phil

Offline crok

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Re: 15t front sprocket
Reply #5 on: December 14, 2013, 05:26:38 PM
be aware that there are pros and cons.

You increase your high speed cruising revs.
Acceleration from standstill will be better, and once under way acceleration may be better at some speeds and worse at others, depending on how the speed you're doing matches a gear ratio.
I think top gear acceleration is bound to be better but that is offset by the increase in cruising revs ...

good idea to try these things out, but the standard gearing was just right for me ... guess I like a high top gear for cruising.
Last Edit: December 14, 2013, 05:31:10 PM by crok
Davy

Offline DetourPhil

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Re: 15t front sprocket
Reply #6 on: December 14, 2013, 06:58:59 PM
Thanks for the comments, I could do with a longer time on the bike & more miles.

Yes cruising revs are higher but top gear acceleration is improved :)
Top gear is quite long legged & I have no desires to break three figure speeds.

Phil

Offline Jimbo675

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Re: 15t front sprocket
Reply #7 on: December 14, 2013, 09:25:07 PM
Try this....its really good.

http://www.gearingcommander.com


Offline jan1195xx

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Re: 15t front sprocket
Reply #8 on: March 07, 2015, 08:19:37 AM
A question to the speedo. I bought a obd tool the see all the details of the elektronics on the netbook and had the CR on the centerstand. When i started the engine and get in first gear the rear wheel starts rolling, and the speedo shows a speed of 10 to 12 km/h. So when the speedo gets a signal from the abs of the rear wheel, a change of the sprocket will bring you a wrong speed, right? Or am i wrong?


Jan

Offline Jimmy.S

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Re: 15t front sprocket
Reply #9 on: March 07, 2015, 11:11:45 AM
If the speed signal are from the abs your speed will be right on the speedometer and the change of spocket doesn´t affect the speedo, but if the speedsignal is picked up from the frontspockets axel then you got the wrong speed if you change any spocket.

 


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