[fillmarr]

Snapped one, and need to replace. My hardware store didn't have the exact size I needed. I tried posting in the manuals section looking to see that part catalogue but its not working. Sorry guys. I do think this will be a helpful article for others to reference though!

Here it is from my build thread:

 

[dtsmjr8dan]

This fiche lists them with sizes, but for some reason they skipped #8 which is used a few times. You might be able to measure one of yours relative to the ones in that fiche to get the correct size. https://www.cmsnl.com/honda-cb450k7-1974-usa_model455/partslist/E++18.html#results

 

[fillmarr]

After some poking around at the hardware store, I determined the correct size and ordered from the BoltDeport.com. They have the metric bolts you need and you can order in as small a quantity as you want. Only option was stainless steel, but as advised I just lightly coated under the head/washer (they didn't have flange bolts) with anti seize. Same story with the threads....anti seize to slow corrosion.

The *thinner* crank case bolts were all of varying lengths but of the "m6 x 1.0" variety. The bolts are slightly longer nowadays but will still fit.

 

[Gixxer-18]

Hi Fillmarr this fiche has the bolt sizes you were looking for:

Good luck with the rebuild!
Nigel.