Honda motorcycle parts
Choose your model and year to see parts listed for your bike.
Choose your model and year to see parts listed for your bike.
1972 Honda CB450K · Fork Tubes, Springs, Seals & Boots Buying guide
The top bolt replaces 90123-323-010, with no stated thread dimensions. Internal circlips are 48mm and reference 94521-48000. Stock-type gaiters use 51611-300-000; the alternative using that reference is described as about 1.75 inches shorter.
One top bolt with included O-ringAftermarket 90123-323-010 replacement, sold individually. Check fork application and needed count; exact thread size and pitch are not provided.View part
Two 48mm fork internal circlipsSet of two replacing 94521-48000. Compare the removed internal clips and fitted fork; dimensions of another clip listing are not this product’s specification.View part
Two stock-type black gaiters51611-300-000 replacement set. Compare the actual covering arrangement and required length before choosing this or the shorter alternative.View part
Related parts: Screw-on reflector, reference 33741-340-670 · Separate front reflector rubber base · Two chrome trims at the fork boot tops
The reflector replaces 33741-340-670 and states a 6mm mounting thread. The rubber base is a separate 33743-341-670 component beneath the stock front reflector. Check the actual mount and support; the base description does not confirm a reflector included, and the reflector’s thread pitch is unstated.
Stock and shorter gaiter sets both use 51611-300-000 but have a stated length difference. Cover rubbers 51601-300-000 and boot-top trim 51608-300-000 are other two-piece purchases. Compare coverage and the retained fittings before assuming a gaiter package also supplies the cover rubbers or chrome trims.
The frame-number restriction is expressly attached to the CB750K application. The CB450K entry lists 1972–74 without that cutoff. Check the removed clip against this product’s 48mm size and reference 94521-48000, especially if the fork has changed.
The reflector states a 6mm thread without a pitch specification or complete mounting hardware list. Compare the actual threaded mount and any separate base or fittings required. That diameter alone cannot verify an unidentified replacement mount.
The cap description confirms an O-ring supplied but does not give its dimensions. Identify the seal required and confirm the selected replacement’s own specification before buying another. The cap reference and included-piece statement do not provide missing seal measurements.
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