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Hi, just got my wheels back from the powder coaters, looking at them, there are 3 holes in various locations, where the valve goes. never noticed it before. Are there some types of bungs for these?? and are thet ment to be there??
 

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For rim locks. You can get a liner to lock the tyre bead onto the rim to allow you to run the tyres at really low pressure (for better grip off road) without them slipping. The liner bolts through the rim using the holes you have found.
 

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cap rim hole honda

The largest hole in the rim is usually for the valve stem so that it can allow the stem to move around a bit should the inner tube shift when the bike is in use. This will then stop the stem from being forcibly removed from the inner tube, with dire consequences.

The other two holes are, as said previously, for rim locks or security bolts. The one adjacent to the valve stem is used for the rim lock for those who don't mind the rim being out of balance & need to change a tyre quickly say during an enduro. For others it is best having the rim lock opposite the valve stem as this helps with the balance of the wheel, which is not too critical on a dirt bike. You then use the 'cap-rim-hole to blank off the unwanted hole so's to stop the inner tube trying to force the rim tape out of the hole & cause a stress area in the inner tube.

Honda also make some nice rubber stem seals that allow the valve stem of the inner tube to fit into the hole in the rim, but to stop any crud/dirt/water etc to get into the wheel innards. These are also available from other people other than Honda...& probably a lot cheaper as well. I've seen them for £3 for a pair.
cap valve honda
 
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