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Tiger Time => Steamers (1993-1998 Tigers) => Topic started by: NeilD on October 11, 2009, 05:33:56 PM

Title: RPM vs MPH
Post by: NeilD on October 11, 2009, 05:33:56 PM
not sure if my speedo is accurate.. i think its reading 'fast' as I dont feel I'm going as fast as its saying..

today it was showing 80mph at 5500 RPM in top.. assuming standard gearing, is this correct?
Title: Re: RPM vs MPH
Post by: ramseybella on October 11, 2009, 06:50:27 PM
Quote from: "NeilD"not sure if my speedo is accurate.. i think its reading 'fast' as I dont feel I'm going as fast as its saying..

today it was showing 80mph at 5500 RPM in top.. assuming standard gearing, is this correct?

I took mine out last night was hitting 105MPH in 6th and was doing  5K to 6K, never will I take this beast at that speed again it does not take to the wind very well.
Was tears rolling out of your eyes? You may have been going faster than you think. :shock:
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Post by: Mustang on October 11, 2009, 07:25:25 PM
This is with standard 18/48 sprockets in sixth gear , and I know my speedometer is very accurate at this speed as it has been "calibrated" by California Highway Patrol's Radar gun :ImaPoser

(http://i231.photobucket.com/albums/ee47/2uoykcuf/rocky%20mtn/101_2416.jpg)
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Post by: NeilD on October 11, 2009, 07:58:04 PM
Quote from: "Mustang"This is with standard 18/48 sprockets in sixth gear , and I know my speedometer is very accurate at this speed as it has been "calibrated" by California Highway Patrol's Radar gun :ImaPoser

thanks, looks like its about right then... thourght I'd ask before I received a similar calibration check..  :D
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Post by: Sin_Tiger on October 12, 2009, 09:50:39 AM
Borrow a GPS to check it  :D
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Post by: Nick Calne on October 12, 2009, 02:46:57 PM
When my speedo drive broke I used a cycle speedo for a couple of months until I could get the required part from ebay.  Now I have replaced the speedo drive I have both at once.  Typically the original speedo shows 2-5mph more than the cycle one.  I guess that the triumph item is designed to over read slightly to avoid litigation issues.
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Post by: oxnsox on October 12, 2009, 11:58:07 PM
QuoteI guess that the triumph item is designed to over read slightly to avoid litigation issues.
Try telling that to the bloke with the book as he writes you a note...  :D  :D

IF, any manufacturers do do this I doubt it has anything to do with avoiding tickets...  more to do with making the machines look faster for their owners egos.
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Post by: Nick Calne on October 18, 2009, 10:01:47 PM
All manufacturers do this.  Think about it.  Imagine the implications of not doing it....

Went out this weekend and 5500rpm = 80mph in top .
Title: Re: RPM vs MPH
Post by: nickjtc on March 23, 2014, 09:53:49 PM
So when I went out on my first ride today and the bike showed 100kph at around 4,000rpm that is about right? I was thinking that it was a bit too revvy..... but having said that it's the first multi I've ridden in a few years!
Title: Re: RPM vs MPH
Post by: Bixxer Bob on March 23, 2014, 10:29:17 PM
Our local speedwatch group has installed a speed checker in the village and shows my Girly to be spot on. My Garmin GPS says the same.  I asked about the speedchecker and it has a calibration certificate so I know it to be correct. Worth looking around your location se if you have one. Or use a GPS.

Interestingly, my 4x4 is showing 33mph when doing 30 and my motorhome, like the Girly, is spot on.  The Backbird is about 10% high across the whole range (by GPS I'm not that daft) and the old Yam likewise.
Title: Re: RPM vs MPH
Post by: nickjtc on March 23, 2014, 11:12:47 PM
I'm not too concerned about speed; don't go fast enough any more to excite the local plod. But I do like a relaxed engine cadence... if that is poss in a multi.  :icon_wink:
Title: Re: RPM vs MPH
Post by: JayDub on March 24, 2014, 05:11:25 PM
Quote from: NeilD on October 11, 2009, 05:33:56 PM
not sure if my speedo is accurate.. i think its reading 'fast' as I dont feel I'm going as fast as its saying..

today it was showing 80mph at 5500 RPM in top.. assuming standard gearing, is this correct?
i have a free android phone app called speedometer  :icon_scratch: - it works really well - handy if your speedo cable breaks too.
Title: Re: RPM vs MPH
Post by: nickjtc on April 02, 2014, 12:47:32 AM
Interestingly enough this bike has the most accurate speedo/odometer combination I have ever seen. With stock sized tyres (Tourance NEXTs), and using a Garmin GPS for calibration, the speedo is only 2-3% optimistic and the odometer shows a discrepancy of only 150 metres over 100 kilometres.
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