I'm about to have a motor mount for my sportster machined up for me. I have a Haifley hardtail and the stock rear end to reference and Im not digging the countersunk holes for the lower motor mount because I wanted to use a 3/8 thick cr steel bar stock for mine
Here's Haifley and stock with the long countersunk holes...
Here is what I'm thinking of, although the hole dimensions might change with the furtherment of this question
... On the tc brothers hardtails, there is no countersunk hole and it looks like an idea similar to mine.
I would like some input from y'all as to ...
1.why are these countersunk, and what the reason is(maybe there is an insert for vibration or something..I also see the lower mount on the frame is serrated inside so maybe that holds something)
2. And what size should I make my bolt holes for that mount... Should they be a perfect .50" to .50" match? I'm curious that a perfectly tight fit might not me good for holding two object together that vibrate.
Here's Haifley and stock with the long countersunk holes...
Here is what I'm thinking of, although the hole dimensions might change with the furtherment of this question
... On the tc brothers hardtails, there is no countersunk hole and it looks like an idea similar to mine.
I would like some input from y'all as to ...
1.why are these countersunk, and what the reason is(maybe there is an insert for vibration or something..I also see the lower mount on the frame is serrated inside so maybe that holds something)
2. And what size should I make my bolt holes for that mount... Should they be a perfect .50" to .50" match? I'm curious that a perfectly tight fit might not me good for holding two object together that vibrate.
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