RE: [ST] chain + sprockets

[simonb <simonb@xxxxxxxxxxx>]

On Fri, 2004-06-11 at 17:20, Mike Bostock wrote:
> In your message regarding RE: [ST] chain + sprockets dated Fri, 11
> Jun 2004 10:59:16 -0400, Rupert Galea said that ...
> 
> > > Stock on newer Sprints is 19/43. Lots of people like 18/43 (myself
> > > included) for a bit more grunt. 18/45 is popular over on the T595.net
> > > forums for even more grunt. I'm on the fence as to whether I will go
> >RG- 18/43
> > > or 18/45 for my impending chain+sprocket change. Depends on my success
> > > with my recently acquired TuneBoy. The bike is running much better
> >RG- (still
> > > tweaking), but I don't know if I need any more grunt. 5K RPMs is
> >RG- SMOOTH
> > > and equates to an indicated 80/81 MPH with 18/43. Not sure I want to
> >RG- mess
> > > with that.
> > > 
> > > Garry
> >RG- 
> >RG- Thanks Garry. I have a 99 which I believe comes with an 18/43.
> 
> I have a '99 and I have gone 18/45.  Still uses 108 link chain. 
> Shortens wheelbase by just over 1 cm. On Spanish Autoroute (freeway)
> journey which is the best test as to how the change on gearing
> effects mpg at the top end I was heavily laden and getting much
> better than 10 miles per litre 2 weeks ago when averaging (including
> fuel stop) 69mph over 250 miles.
> 
> Ergo you will not notice any significant change in MPG.
> 
> 18/45 certainly suits my normal riding roads much better and I would
> suggest it is the optimal ratio for the bike.  I always maintained
> that Triumph went down the 19/43 route for the US market thinking
> that you guys spend all your time on the Freeway ;-P  Any serious
> mountain work benefits from 18/45 as you can then sometimes actually
> get out of 2nd!!!
> 
> If you want to know what the RPM changes are with the different final
> drive gearing look back through the archives as I posted it a while
> back - or I will resend that post offlist to you.  Seriously, you
> will not notice any difference at 80MPH.

Mike could you stick it on "our" web page?


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