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Author Topic: 1973 DT250 Cafe/Brat build  (Read 3220 times)

Offline Giancarlo124

  • Posts: 31
Re: 1973 DT250 Cafe/Brat build
« Reply #15 on: Jan 02, 2017, 21:29:24 »
Im watching a fork brace on ebay right now, hopefully i can snag it
The Oil Burners:
73 Dt-250
66 YM1 305
09' jetta TDi

Offline Erskine

  • Posts: 2163
Re: 1973 DT250 Cafe/Brat build
« Reply #16 on: Jan 03, 2017, 11:56:29 »
It originally had a 21 in the front but it has the optional factory 19'' wheel now. Do these flex a lot? Will a fork brace help?


Yep they will flex like spaghetti in every conceivable direction, however, even a steel mudguard will go a long way to mitigate it, and you have lugs available on the fork lowers to use. The more you can make the front suspension system work as a solid unit will pay dividends.
If one side moves up even a millimetre ahead of the other, by the time that is translated to the contact patch of a 19" tyre, you are looking at masses of misalignment and gyroscopic tomfoolery going on.
It's easy enough to weld one up comprising of two hoops, one in front and one behind and bolted to the fork lugs if you can't get a funky machined clamp.

Offline Giancarlo124

  • Posts: 31
Re: 1973 DT250 Cafe/Brat build
« Reply #17 on: Jan 08, 2017, 18:58:02 »
Got some new parts today. Bars are from Hvccycle and fork brace is a vintage deal from ebay.


The Oil Burners:
73 Dt-250
66 YM1 305
09' jetta TDi

Offline Giancarlo124

  • Posts: 31
Re: 1973 DT250 Cafe/Brat build
« Reply #18 on: Jan 08, 2017, 19:07:57 »
Yep they will flex like spaghetti in every conceivable direction, however, even a steel mudguard will go a long way to mitigate it, and you have lugs available on the fork lowers to use. The more you can make the front suspension system work as a solid unit will pay dividends.
If one side moves up even a millimetre ahead of the other, by the time that is translated to the contact patch of a 19" tyre, you are looking at masses of misalignment and gyroscopic tomfoolery going on.
It's easy enough to weld one up comprising of two hoops, one in front and one behind and bolted to the fork lugs if you can't get a funky machined clamp.

Thanks for the info!
The Oil Burners:
73 Dt-250
66 YM1 305
09' jetta TDi

Offline Erskine

  • Posts: 2163
Re: 1973 DT250 Cafe/Brat build
« Reply #19 on: Jan 08, 2017, 20:10:23 »
That brace will do the trick :)

Offline Giancarlo124

  • Posts: 31
Re: 1973 DT250 Cafe/Brat build
« Reply #20 on: Jan 08, 2017, 20:27:08 »
That brace will do the trick :)

probably will mount the fender from it too
The Oil Burners:
73 Dt-250
66 YM1 305
09' jetta TDi

Offline Jachana

  • Posts: 212
    • 1980 CM400
Re: 1973 DT250 Cafe/Brat build
« Reply #21 on: Jan 09, 2017, 11:46:21 »
Nice Brace. I had one on my RT3 and it worked nice. I don't think I can run one on El Chivo because of the larger front tire now but I may just try.

Looking Great man,

Jachana
1980 CM400 Cafe
1976 Goldwing "Goldfinger"
1973 RT3 360 Resto
1973/77 RT3 "El Chivo"

Offline Giancarlo124

  • Posts: 31
Re: 1973 DT250 Cafe/Brat build
« Reply #22 on: Jan 09, 2017, 12:17:24 »
Nice Brace. I had one on my RT3 and it worked nice. I don't think I can run one on El Chivo because of the larger front tire now but I may just try.

Looking Great man,

Jachana

Thanks man. loving your build as well. I think i will have to modify the mounting holes on the brace as it comes a little too close to the larger and lower headlight.
The Oil Burners:
73 Dt-250
66 YM1 305
09' jetta TDi

Offline Giancarlo124

  • Posts: 31
Re: 1973 DT250 Cafe/Brat build
« Reply #23 on: Mar 14, 2017, 12:01:03 »
Been a while since I checked in here but I have gotten work done on the bike. I finished making new clutch, front brake, and throttle cables using the venhill cable kits that can be found on ebay. I also got most of the wiring harness finished, all I need to do is but some lights and wire them up. I put a new mikuni tm32 flatslide carb on. And I bent up a new kickstart lever cause the old one bent when the motor kicked back. Next week I will start modifying and fabricating an expansion chamber

Some of the wiring


Front brake cable








The Oil Burners:
73 Dt-250
66 YM1 305
09' jetta TDi


Offline Giancarlo124

  • Posts: 31
Re: 1973 DT250 Cafe/Brat build
« Reply #25 on: Apr 27, 2017, 22:27:11 »
Cool project man.  This is going to be great!

Thank you! Glad you like it
The Oil Burners:
73 Dt-250
66 YM1 305
09' jetta TDi

Offline Giancarlo124

  • Posts: 31
Re: 1973 DT250 Cafe/Brat build
« Reply #26 on: Apr 27, 2017, 22:28:36 »
I sent the seat off to get upholstered and got the pipe mounted, more updates coming soon!

The Oil Burners:
73 Dt-250
66 YM1 305
09' jetta TDi

Offline jimmer

  • Posts: 554
Re: 1973 DT250 Cafe/Brat build
« Reply #27 on: Apr 27, 2017, 22:49:11 »
Looks good. What is the pipe? Did you port the cylinder, Boyesen ports,any trick reeds? Great carb choice.
Yamaha Blaster Bike                                                                  Suzuki T500 Titan Twingle

Offline Giancarlo124

  • Posts: 31
Re: 1973 DT250 Cafe/Brat build
« Reply #28 on: Apr 27, 2017, 23:07:48 »
Looks good. What is the pipe? Did you port the cylinder, Boyesen ports,any trick reeds? Great carb choice.

pipe is an old one i found on ebay that i modified the header tube to go down, i kept the length right so it should be pretty decent (cant be worse than the stock pipe). No porting yet. has boyeson 603 power reeds in the cage, tm32 mik carb. And I have a GYT high compression head that will eventually go on. Glad you like it!
The Oil Burners:
73 Dt-250
66 YM1 305
09' jetta TDi

Offline brad black

  • Posts: 132
Re: 1973 DT250 Cafe/Brat build
« Reply #29 on: Apr 30, 2017, 00:48:00 »
some light reading for pipe design on the dt

http://www.bridgestonemotorcycle.com/documents/do_you_really6.pdf