Topic: Can a 750F swinarm bolt be replaced by a .....

[Flying J]

I want to put some rearsets on my 750f. i was thinking of just welding some brackets to mount a set from feebay and then eliminating the bulky aluminium pieces all together. So if i remove the current brackets the bolts for the swing arm (#1 in pics) will be to long as well as the other one, motor mount? (#2 in pics). My question is will bolts from a 750k fit this distance perfectly? Anybody know? or have done this.


these things are so Fugly.

[fuzzybutt]

cut the bolt to length and re-thread it

[Flying J]

I guess i could do that. I don't have a tap and die set but i will probably will end up needing one again. Thanks fuzzy for pointing out the obvious.

[754]

The K bolts off a 77/78 K should fit. If the frame is not wider on those years then all K bolts would fit.

I picked up some F parts, one of them fuglys is in good shape.. I will take a look to see if they maybe can be milled out to make them lighter & better looking.

[fishhead]

I would imagine the swingarm bolt would work fine. The lower engine mounting bolt on the K model also holds the footpegs on and will probably need to be rethreaded or have a spacer added. It is probably shorter than the F model though.

[KB02]

Okay - Not that I mean to hijack this thread here, but I'm actually going the other way with my rearset brackets. I have a K and want to use the Swingarm bolt to mount my rearset bracket with. I think we need to trade measurements (if not swing arm bolts  ) to see if each other's idea are going to work.

1978 CB750K (rough measurements):
Swing Arm bolt: 12 7/16" (316mm)

Lower engine mount bolt: 13 11/16" (347mm)

What do you have? 

[Flying J]

1978 CB750F (really rough measurements):
Swing Arm bolt: 14 3/4" )
Lower engine mount bolt: 17"

it was kinda hard to take these measurements with the parts on the bike but this gets you in the ballpark.

[754]

the fuglys can be made to look better!!

Look at the back of them, leave the thicker web portion, then remove the middle.. drill, hacksaw, & file.. or mill if you have one..

[KB02]

1978 CB750F (really rough measurements):
Swing Arm bolt: 14 3/4" )
Lower engine mount bolt: 17"

it was kinda hard to take these measurements with the parts on the bike but this gets you in the ballpark.

Did you include the bolt head on your measurements? I did not for mine.

[Flying J]

yeah i did

[KB02]

No biggie. The heads are probably the same size. I'll measure and post when I get home.

[KB02]

Engine mount bolt and Swingarm bolt heads are 5/16" and 3/8", respectively.