What size and length are the engine mount bolts? Honda CX500, GL500, CX650, GL650

Lost your engine mounting bolts? Here’s a list of the part numbers and dimensions for them. We’ll add more as we find them, as well as find some photos of the locations to make it more clear.

The stock bolts are not threaded their entire length; as time permits we will make notes of how far the threads extend along the bolt.

As usual, these tables are sortable – if you click on the heading it will sort by that column.

Model Bolt Location Part ID Bolt Diameter Bolt Length Bolt Thread Pitch Matching Nut Matching Nut ID Notes
CX500 (Single Spine, ’78-’82) Rear Upper (2 of) 95801-1007000 10mm 70mm ? 10mm hex nut 94030-10000
CX500 (Single Spine, ’78-’82) Rear Lower (1 of) 90110-415-000 12mm 308mm ? 12mm flange nut 94050-12000
CX500 (Single Spine, ’78-’82) Upper Rear Cover (1 of) 95800-1011500 10mm 115mm ? 10mm flange nut 94050-10000 Not present on TI bikes
CX500 (Single Spine, ’78-’82) Frame to Triangular Mount
(Upper Rear Cover, 2 of)
95700-0810008
95701-0810008
8mm 100mm ? 8mm flange nut 94050-08000 Not present on TI bikes

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