The JR counter will fit on most bicycles without modification. Remove the wheel from the bicycle and slip the counter over the axle on the LEFT side. Put the wheel back on the bicycle with the counter between the fork and the wheel. Tighten the wheel securing nut or lever.
Counter mounted on bicycle.
CAUTION: IMPORTANT - DO NOT ATTEMPT TO ROTATE THE WHEEL OR RIDE THE BICYCLE UNTIL YOU HAVE CHECKED FOR PROPER CLEARANCE. YOU MAY DAMAGE THE COUNTER.
Wiggle the wheel back and forth just a little. If the large counter gear rubs against the fork the fit is not correct. This can be sometimes be corrected by installing a washer between the outer side of the counter and the inside of the fork. Try this. If free rotation without rubbing cannot be obtained, the counter cannot be used on your bicycle.
Check for clearances!
If there is interference between the small plastic gear and the spokes, install a washer between the inside of the counter and the adjusting nut on the wheel.
If you are unable to fit the counter to the bicycle using washers, it may not be possible to use the counter on the bike.
The counter is driven by a small metal projection (tang) on the inside of the large gear. This should reach between two spokes, which will cause it to rotate. If the tang is not long enough, slip an electrical connector over the tang to make it longer. The tang may also be wired to a spoke using the small hole provided on the tang.
Once the counter is properly installed, and no interference is present, you can safely ride the bicycle and obtain proper counter operation.
Again – before attempting to rotate the wheel, check for interference. If you do not do this you will damage the counter. We will not be responsible for damage due to improper installation.
The manufacturer of the Veeder-Root counter used on the Jones counter recommends that rotation not exceed 500 rpm. In riding terms this amounts to about 15 mph or 25 km/hr. Many get away with riding faster, but forewarned is forearmed. Overspeed may cause damage to the working parts of the counter.
Do not oil
Several old pre-JR model counters have been received for rehab. On most it is hopeless and we can’t help. One common cause is a buildup of black gummy material in the main gear joint. We recommend that no lubricant be used in this joint, as it attracts dirt, and can turn into a sticky paste. It is almost impossible to clean out.