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Author Topic: 1991 cb750 nighthawk brat  (Read 2630 times)

Offline harley497

  • Posts: 13
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: 13
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: 166
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: 13
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: 102
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: 13
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!

Offline harley497

  • Posts: 13
Re: 1991 cb750 nighthawk brat
« Reply #17 on: Nov 26, 2017, 16:46:35 »
Ok so frame been finished a while ago, repainted and now assembly is in the progress. So far so good. Rear shocks probably too long but will see later. New foot controls and kickstand look good..








Offline themountain

  • Posts: 9
Re: 1991 cb750 nighthawk brat
« Reply #18 on: Nov 28, 2017, 20:09:49 »
Amazing build..congrats! I think the shocks are fine as they are and with this incredible Tank it will look the dogs bollocks. 8)

Offline cxman

  • DTT SUPPORTER
  • *
  • Posts: 2355
Re: 1991 cb750 nighthawk brat
« Reply #19 on: Nov 28, 2017, 21:09:49 »
unless you are heavy enough to drop the frame down on those shocks

the chain will grind the top of the swing arm the way you have it set up
1978 CX650 Super Deluxe
1979 XS1100 Special
1974 xl350
1983 cx650 Custom
1973 cb750
1980 cb750
1981 cb650
1982 cb900 c
1974 kawasaki 350 bighorn
1983 GL1100 aspy full dress
1983 GL1100 Nekid
and a bunch of others