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Author Topic: 1991 cb750 nighthawk brat  (Read 1947 times)

Offline harley497

  • Posts: 10
Re: 1991 cb750 nighthawk brat
« Reply #10 on: Feb 13, 2017, 12:48:41 »
Aah it looks I made a huge mistake back at the time of seat loop installation!! Frame was sitting flat top on the floor and I was leveling seat subframe with frame's bottom tubing..

As it turns out, with suspension and wheels on, frame is tilted with front upwards =  my seat loop is totally downslope. More or less level if I slide front fork to lower it 2-3 inch, and with rear couple inches higher, which is already quite some impact on trail. And with rider on, rear will go down even more. Sad. Looks like I will have to fully cut loop from frame and fix it inch or higher at rear upper shock mount.. Hell, I totally overlooked this, with tank, electricity tray and seat almost done)

« Last Edit: Feb 13, 2017, 12:54:49 by harley497 »

Offline harley497

  • Posts: 10
Re: 1991 cb750 nighthawk brat
« Reply #11 on: Mar 04, 2017, 14:15:20 »
Ok so loop has been cut. With half-inch plywood in between already looks much better. Unfortunately not enough 'meat' or will be unpretty with existing downtubes. Already bought another frame, going to replace whole struts. Wasnt sure about seat length, seemed a bit too long. But with friend sitting on bike, looking good as a whole thing. Will keep that way for a while.






Offline esmoojee

  • Posts: 163
Re: 1991 cb750 nighthawk brat
« Reply #12 on: Mar 04, 2017, 14:31:26 »
you could go with cbr 600 f2 or f3 front end.  It would drop your front down an 1" and you could use the stock triples.  You may have to make some spacers for the wheel.  It's an option.  Or see if you could find a euro cb750 rc42 front wheel.  It should drop right in and you'd have dual front disc brakes and 17" wheel. 

Offline harley497

  • Posts: 10
Re: 1991 cb750 nighthawk brat
« Reply #13 on: Jul 09, 2017, 17:52:11 »
Slowly but surely.. Seat subframe tacked finally in right place, electrics fully done, handlebar done, seat ready for upholstering.. Next few days hope to fire up engine first time after top end overhaul..







Offline vwrabbit

  • Posts: 103
Re: 1991 cb750 nighthawk brat
« Reply #14 on: Jul 09, 2017, 22:37:27 »
Wow, that seat frame looks great!  Even before the fubar. 

Offline harley497

  • Posts: 10
Re: 1991 cb750 nighthawk brat
« Reply #15 on: Jul 10, 2017, 17:13:24 »
Finally, it's alive! What a milestone for me, works pretty fine, a bit unexpected though)


Offline Supergyro

  • Posts: 55
Re: 1991 cb750 nighthawk brat
« Reply #16 on: Jul 11, 2017, 01:17:39 »
 You do quick work sir! And it looks good to boot!