[Author Index]
[Date Index]
[Thread Index]
[Date Prev][Date Next][Thread Prev][Thread Next]
Re: [ST] effect on tach?
- Subject: Re: [ST] effect on tach?
- From: "rmasiak" <rmasiak@xxxxxxxxxxx>
- Date: Mon, 13 May 2002 22:16:53 -0400
Bare,
I disagree, about changing sprocket ratio's not affecting (RPM) or (MPH).
It will, although I don't know the technical reason to back me. On my RS
with stock ratio of 19/43 I run 5000 RPM doing 86 MPH. Now, like I said, I
don't know the theory behind it BUT I guarantee that if I change my ratio to
17/43 my RPM's will be higher at the same speed of 86 MPH.
Hence, with a 17/43 ratio, my MPH will be less doing 5000 RPM's or ii I
choose to go the same speed as before then my RPM's will be higher to do the
same 86 MPH as before.
I was going to wait till I was ready but since this topic was brought up I
have a question for everyone. With stock ratio of 19/43 I run 5000 RPM
doing 86 MPH. I want to change my front sprocket at my 12000 mi service but
unsure if I want 18/43 or 17/43.
Question: Anyone out there who is running 18/43 or 17/43, what is your RPM
in 6th gear doing 86 MPH???
I know the RPM will go higher with each step but how much will make my
decision on which setup I want. Any input would be appreciated.
- -Rich
- ----- Original Message -----
From: bare <barenekd@xxxxxxxxxxxxx>
To: <ST@xxxxxxxxxxxxxx>
Sent: Monday, May 13, 2002 1:57 PM
Subject: [ST] effect on tach?
> Changing gearing has no effect whatsoever on your tach. The tach measures
> engine RPM and doesn't give a rat about gearing. Changing gearing also
will
> not effect the speedo since it is driven off the front wheel. What will
> change is the relationship between the tach (RPM) and speedo (MPH). But
they
> both will continue with the same errors that were originally there.
Changing
> front tire size will affect the speedo on a Triumph.
> On the other hand, all motorcycles do not drive off the front wheel, some
> drive off the rear wheel and some drive off the tranny. Changing gearing
or
> rear tire size on these will effect any speedo error. They do not affect
the
> tach, either, however
> People who run oversize tires on their pick-m-up trucks would like to have
> more accurate speedos, so the Yellow box is handy for them. All off road
> vehicles are not driven 100% off road.
> Bare.
>
* * * * * * * * * * * * * * * * * * *
The ST/RS Mailing list is sponsored by Jack Lilley Ltd.
http://www.TriumphNet.com/st/lilley for more info
http://www.TriumphNet.com/st for ST, RS and Mailing List info
=-=-=-= Next Message =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=