Honda motorcycle parts
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1971 Honda CB500K · Mounts, Rubbers & Hardware Buying guide
The rings secure a gauge restoration, the grommet replaces rubber around the trip-meter knob, and the cover set changes the outside appearance. They are separate products with different fit and contents checks.
Nippon Seiki crimp ring setTwo rings, listed at 103.4mm inner and 108.2mm outer diameter for gauge restoration.View part
Trip-meter knob grommetReplacement rubber grommet for the trip-meter knob; not a new knob or complete instrument.View part
Chrome instrument cover setCovers for stock-type gauges, with a trip-reset cutout. Speedometer and tachometer are not supplied.View part
The crimp ring listing is specifically for Nippon Seiki gauges and gives both diameters. Check the instrument maker and the existing ring before ordering. A CB500K model application does not prove a changed instrument retains that construction or those dimensions.
A chrome cover fits over a stock-type instrument; it does not replace a damaged face, operating mechanism or crimp ring. The trip-knob grommet is a separate rubber item. Order against the actual part you need, and read the cover exclusion before interpreting its installed photograph.
The CB500K/CB550 rings are for Nippon Seiki gauges: 103.4mm inside and 108.2mm outside diameter. The source lists CB750 rings at 102.7mm inside and 107.5mm outside. Check maker and measurements; appearance does not establish interchangeability.
One rubber grommet is supplied for one trip-meter reset shaft on a compatible speedometer. Compare the dried or torn rubber at that location with the intended replacement, keeping it distinct from sealing components inside the gauge.
Compare the stock-type gauge housing with the covers’ 103mm base diameter, 87mm top diameter and 37mm height. Fit the cover with the reset cutout over the speedometer. Their stock-gauge application does not establish fit over an aftermarket instrument.
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