Description

Universal motorcycle top case mounting bushing (M6) A simple but essential part that sits between your top box / luggage case and the rear rack. It centers the case on the rack, takes up the play in oversized mounting holes and absorbs vibration from the road, so your bolts stay tight and the plastic of the case does not crack around the mounting points. Original bushings from luggage kits are often the first thing to get lost, torn or squashed flat - and dealers rarely sell them separately. Print a set in a few minutes instead of ordering a whole new mounting kit. Features Designed for M6 bolts (works with M6 hardware and washers you already have) Stepped / shouldered design - the collar locates the bushing in the rack hole, the flange spreads the clamping load Universal fit: suits most aluminium and plastic top cases, tail boxes, helmet trunks and delivery boxes mounted on a flat rack or mounting plate Prints without supports, flat on the bed Can be printed rigid (PETG) as a precise spacer/bushing, or in TPU for real vibration damping Dimensions | | mm | |---|---| | Bottom flange diameter | 27.0 | | Top flange diameter | 23.4 | | Collar / neck diameter (fits the rack hole) | 12.2 | | Collar height (= rack plate thickness) | 3.2 | | Bottom flange height | 5.5 | | Top flange height | 5.3 | | Total height | 14.0 | | Bolt hole | 6.3 (M6 clearance), countersunk | Before printing, check your rack: the hole in your luggage rack should be about 12.5 mm and the plate around 3 mm thick. If your rack is different, the model scales easily in any slicer - or leave a comment and I can upload your size. Typical use Top case / tail box to luggage rack Delivery box, helmet case, tool box on a rear carrier Any panel or accessory bolted through a bracket where you need a shoulder bushing / grommet Note Non-critical, accessory part. Always check the fit and torque your bolts sensibly - do not over-tighten, especially on TPU prints. Not a safety-critical structural component. If it wo