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.
Several old pre-JR model counters have been received for rehab. On some it is hopeless and we can’t help. One 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.