bad speedo

[Fred Hink]

I have seen several stuck pinion gears.  Once the big gear is removed the smaller gear is still frozen.  This is either from muck getting past the seals cause it to freeze up or from the big hear or hub coming apart getting big bits of metal in to the pinion gear.  It s hard to tell which comes first.  (chicken or the egg) Big gear breaking up because of a stuck pinion gear or pinion gear getting stuck because of the big gear lack of lubrication. Fred http://www.arrowheadmotorsports.com   [b]From:[/b] DSN_KLR650@yahoogroups.com [b]Sent:[/b] Monday, September 28, 2015 11:51 AM [b]To:[/b] DSN_KLR650@yahoogroups.com [b]Subject:[/b] [DSN_KLR650] Re: Bad Speedo    

As Mark said, the odometer can be changed but not fun. IMO, it's best to record the mileage from the old speedo and the new on some document, such as the invoice from the replacement, then present that to the new owner if selling in future. You may wish to check with your DMV to see what they advise. If simply for your own interest, it obviously depends on what feels best to you. I'm retired so have lots of time and have done quite a bit of this work so am often motivated to do silly amounts of work for little benefit.   Regarding your failed speedo drive and front wheel: I am seeing more of this due to the aging of the bikes so am actively trying to get the word out. The common problem is lack of appropriate lubrication between the speedo drive gear (the bigger of the two gears in the hub) and the hub spool (the tube on which the gear runs). Both are hard steel and prone to rusting so lack of lubrication + water = disaster. The seal can be pried out without damage, the large gear will pull out although many times it requires quite a lot of force because seizure is pending. Once the hub is stripped to this point, with driven gear/pinion or smaller gear still in place, the drive gear and spool can be cleaned and polished as required. I use a good waterproof extreme pressure chassis grease for the purpose. If someone has encountered a seized or otherwise damaged pinion because of a failure based on the pinion, I would be most grateful to hear. https://www.dropbox.com/sh/n9bg1o5ten6l8r8/AACG9GJPpBuQlsVX5U_nCHBqa?dl=0 https://www.dropbox.com/s/splqt3c02ke5s02/Speedo%20gear%20rust%20%26%20groove.jpg?dl=0 Notice that the spiral lubrication groove is full of material in some areas. I often see these which have been lubed but the groove still solid with dirt. IMO, we all have to be more attentive to speedo hub service, particularly in older bikes.