Question about 2003 CCM 604 RS Roadster

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Spedometer Anyone changed the speedo on their 604 with one off another bike? Mine is reading way out due to different tyre size and i really need a trip meter. Seen a few nice cheap ones on ebay but wondered wether the thread size on drive would fit or dia of body was roughly same.Thought if i get one off bike with same size wheels would be more accurate.I know about the new digital ones but they are out of my price range at the moment?

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Not heard of using one from a different make bike. An option to get you by for now would be a pushbike digital speedo a few on here have used them.,

Posted on Nov 10, 2008


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What diifference will it make to my speedo reading if my front tyre is size 120/60 ZR17 instead of 120/17 ZR17 on m1993 suzuki rf600r bike

If I am reading the tire size right you are dealing with a different width and not circumference. If in fact it is width it want make any difference, however, if it is circumference then if the tire is smaller the transmission is going to have to turn faster to get 50 MPH or any speed. The speed of your car is measured at the back of our transmission. Smaller tires will make the speed-0-meter read fast and larger tires will give you a slow reading. This is the one that will get you in trouble. With a larger tire and you meter reading 50 you might be doing 60 or more. You can figure the speed of any tire on a car just take the circumference of the tire [how many inches it travels in one revolution] and divide it into 5280' for miles then Multiply it by T=time taken to travel distance then figure in the RPM's and drive your self crazy trying to figure it out.
Again as I said if they are the same circumferance then your speed -o- meter will not change.
Col. Dana Gillespie

Jul 05, 2014 | 1993 Suzuki RF 600 R

1 Answer

Can I switch from a 1957514 tire to a 1957014?

Yes you can but expect an error in speedo reading as you are decreasing the circumference of the tyre meaning it turns faster to cover the same distance.. The 195 is the rim width The 75 is the profile height of the side wall and the 14 is the rim diameter in inches So smaller profile size ==lower car= wrong speedo reading. You can use this information to change the rims IE go to 15 inch rims so the tyre reading would look like this 195 35 15 would be about the same as 195 95 14. By lowering the profile size you can go up in rim dia size and still retain the same speedo readings and car height.. Talk to a tyre shop to get the idea.

Nov 17, 2013 | 1994 Nissan Pickup

1 Answer

The rear tyre of my fz16 fails to maintain air pressure due to the damage of the rear near future i would like to change the rim as well as the to maintain a high mileage i would like to...

Don't change tyre sizes. This is a bike with 112mph top speed. The tyre was designed for that bike. Buy the tire size that fits it. In most cases rims can be repaired. Cracks can be filled and machined back to spec. If it is a tubeless tire, removing the tire from the rim, soaping it and refitting it will often stop the air leak.

Dec 20, 2017 | Cars & Trucks

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Electronic speedo is under reading 20 to 30kms an hour. Tyres recently changed ? seemed to start from then ? Hand brake light came on intermittantly Replaced the sensor unit by the gear box with one...

to get the speedo right you will need to fit the original size tyres with the correct speed rating which conforms to the certificate of homoglonation ,deviate from this and this is the problem you get also the vehicle will not pass the annual vehicle mechanical inspection because the tyres are not whats on the original certificate

Aug 01, 2011 | 1994 Toyota Corolla

1 Answer

My speedometer seems to read higher than it should at highway speeds. When traveling at about 40mph its almost dead on with my gps/ other vehicles. When at Highway speeds I can be showing anything from...

unfortunatey you may not be able to fix this, speedos generally run from a sensor or cable at the front axle, and rely on the rotating wheel, and are not generally able to be calibrated.
An instrument tech amy be able to do something if your model?? has an electronic speedo, but the reading can change with different tyre sizes, and even slightly as the tyre wears

Apr 04, 2011 | kawasaki ZX-6R Ninja Motorcycles

1 Answer

The speedo sensor isn't reading the true speed .it reads a lot faster than what bike is going. only had the bike a few days. no idea what to do

The speedo needs callibrating as you have either different sized tyres/wheels or the speedo has been changed.
Take it to a dealer for callibration.

Feb 01, 2011 | 2007 Gas Gas Pampera 450

1 Answer

Hello. My pulsar 150 UG3 is giving me speed of 47kmp at 4000Rpm which is 3kmp slower than normal as i have another same bike which produce 50kmp at 4000. How it can be corrected? I have consulted to...

Speedometers are not exact and they will vary slightly, even between the same model, year etc.
Tyre size and wear also affect the reading because of the distance travelled with one complete revolution of the wheel. A new tyre with plenty of tread depth will travel further in one revolution than an older worn tyre with less tread depth. If you have two bikes and the tyre treads are different depths, just measure around them both and you will see the different circumferences. Multiply that difference by 100 and you see how much further one will travel than the other in only 100 revolutions and when you think how many times a wheel goes round on a journey, the difference is huge. This puts into perspective the 3KPH difference and also why a tyre seems to wear out quicker once it is down to half the original tread depth......I know mine seem to.

Oct 10, 2010 | 2007 Bajaj Pulsar 150

1 Answer

My speedo is off by 5 mph need help?

your speedo will be incorrect due to the tyre size change unless you have changed the wheel size as well.

Aug 02, 2009 | 1992 Ford F250

1 Answer

604 hubs& 644

just looking for wheels now. I can turn spacers if need be but if discs/sprockets don't match I'll be stuffed.The hubs and bearing sizes are the same but either could be made by AJP or Talon. Some handy things to know are ; 604 sprocket is no good for a 644 unless a 520 chain has been fitted. You will need to turn the rear tyre round if the wheell was on a 604 and its to go on a 644. Talon hubs use a different speedo drive to the AJP,,,

Nov 10, 2008 | 2001 CCM 604 RS Roadster

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