I have a cheat bicycle speedometer (Bell F20 Bike Computer, to be exact) and was wondering if it was possible to mount it on my dirt bike (Yamaha TTR-125, to be exact). I don't see a problem except for the fact that the instructions say that the magnets must be within 2mm of each other. I don't know how hard this would be to do considering my bikes aren't exactly accessible right now. Thanks.
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Can you put a bicycle speedometer on a dirt bike?
- Thread starter livewire
- Start date
Sure, it would work and 2mm could be made by using a adjustable slide arm off your fender mounts.
It is hard to "work" on anything when "anything" is not in front of you.
Make sure you use a hand dremel tool and rough up the rim a lil bit where the magnet is to be epoxied to, clean all parts with alcohol and let it the epoxy set up, then set the arm with the sensor to the proper distance.
Good luck
Bob - Tucson
It is hard to "work" on anything when "anything" is not in front of you.
Make sure you use a hand dremel tool and rough up the rim a lil bit where the magnet is to be epoxied to, clean all parts with alcohol and let it the epoxy set up, then set the arm with the sensor to the proper distance.
Good luck
Bob - Tucson
Carl_the_Truth
New member
No, unless it has the same size wheels as a bicycle.How you mount it is also a problem.I've never heard of this being done.
It's That Guy
New member
Yes, lots of people have used bicycle speedos on motorcycles. I belong to a mailing list for vintage BMW bikes, and some of the first watercooled bikes BMW made in the 80s have speedos that die early, and they cost hundreds to replace, so lots of people put on a bike speedo.
For a street bike you have to make sure that the bike speedo goes up into the 80s. Apparently many of them don't. It's not as big a problem on a dirt bike because you don't go that fast.
Then as you say it's just a matter of mounting a magnet on the rim and getting the sensor close enough to read it as it goes by. There are web pages about this. Basically, it's done with epoxy and spacers. Use your imagination!
For a street bike you have to make sure that the bike speedo goes up into the 80s. Apparently many of them don't. It's not as big a problem on a dirt bike because you don't go that fast.
Then as you say it's just a matter of mounting a magnet on the rim and getting the sensor close enough to read it as it goes by. There are web pages about this. Basically, it's done with epoxy and spacers. Use your imagination!
yup i've done it to a couple of bikes you need to program it with the distance covered by one rotation.
I've found the best location is to mount a bracket off of the fork and mount the sensor close to the hub, the magnet is then mounted on to the spoke by modifying the existing spoke clamp.
I've found the best location is to mount a bracket off of the fork and mount the sensor close to the hub, the magnet is then mounted on to the spoke by modifying the existing spoke clamp.