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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
speedo gearbox?
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<blockquote data-quote="timetraveller" data-source="post: 37054" data-attributes="member: 456"><p>Kevin, they are not normally noisy. There is adjustment in and out of the gearbox to allow it to line up perfectly with the H23. I have seen H23s where the bike has been run for year with an incorrect mesh and the H23 has been worn out for half or more of its width and the remainder of the teeth badly distorted. As you have just done a rebuild then you would have noticed this fault, assuming that you had the brake apart. Does the input cog to the gearbox rotate freely by hand with everything above the gearbox still connected? If not look at the cable and speedo. If it does, then look at the teeth on the gearbox pinion and the H23. They should be a nice fit into each other. If that seems ok then spin the wheel without the speedo gearbox to ensure that the noise is not a wheel bearing or something else. If the wheel spins without noise and the speedo gearbox does the same then is there any possibility that the centre of the hole etc for the gearox is in the wrong place meaning that the teeth would be either too tight or too loose in mesh. If everything looks ok then I would spin the front wheel without the gearbox and then insert the box etc while the wheel is still spinning and get a manual feel as to where the roughness is occurring. Good luck.</p></blockquote><p></p>
[QUOTE="timetraveller, post: 37054, member: 456"] Kevin, they are not normally noisy. There is adjustment in and out of the gearbox to allow it to line up perfectly with the H23. I have seen H23s where the bike has been run for year with an incorrect mesh and the H23 has been worn out for half or more of its width and the remainder of the teeth badly distorted. As you have just done a rebuild then you would have noticed this fault, assuming that you had the brake apart. Does the input cog to the gearbox rotate freely by hand with everything above the gearbox still connected? If not look at the cable and speedo. If it does, then look at the teeth on the gearbox pinion and the H23. They should be a nice fit into each other. If that seems ok then spin the wheel without the speedo gearbox to ensure that the noise is not a wheel bearing or something else. If the wheel spins without noise and the speedo gearbox does the same then is there any possibility that the centre of the hole etc for the gearox is in the wrong place meaning that the teeth would be either too tight or too loose in mesh. If everything looks ok then I would spin the front wheel without the gearbox and then insert the box etc while the wheel is still spinning and get a manual feel as to where the roughness is occurring. Good luck. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
speedo gearbox?
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