« previous next »
Pages: [1]   Go Down

Author Topic: DT1 Carby  (Read 1196 times)

0 Members and 1 Guest are viewing this topic.

Offline fatboyracing

  • A-Grade
  • ****
  • Posts: 356
    • View Profile
DT1 Carby
« on: August 25, 2011, 07:30:55 pm »
Just finishing my new DT1 havent started the engine yet completely rebuilt What carby would you guys suggest jets etc I have a few to choose from

Cheers
Fatboy
Logged

Offline oldyzman

  • Legend
  • *****
  • Posts: 2187
  • 250 two stroke!
    • View Profile
Re: DT1 Carby
« Reply #1 on: August 25, 2011, 07:38:41 pm »
Nathan...
Logged
I have a soft spot japanese mxers with aluminium tanks. Two stroke classic Dirt Track...

Offline Nathan S

  • Superstar
  • ******
  • Posts: 7275
  • HEAVEN #818
    • View Profile
Re: DT1 Carby
« Reply #2 on: August 25, 2011, 10:02:55 pm »
I'm not a carby! ;D

Reed or piston port?
Stock or modified?

30mm RT1 carb is the cheapest/easiest upgrade.
34mm RT1MX carb is better, but much harder to find.
A proper race motor will want a 36mm, and some work to adapt it to fit.
Logged
The good thing about telling the truth is that you don't have to remember what you said.

Offline firko

  • Superstar
  • ******
  • Posts: 6578
    • View Profile
Re: DT1 Carby
« Reply #3 on: August 25, 2011, 10:12:07 pm »
34mm flange mount Mikuni is the go or fit a rubber manifold to take a slip on fit 34mm carby. I think the manifold on mine is from a TM 400 Suzuki with the bolt holes opened a little. I can't help with jetting Shane as mine hasn't been run in anger yet and my other DT1 has a 34mm Amal on methanol so that's no good to you.
Logged
'68 Yamaha DT1 enduro, '69 Yamaha 'DT1 from Hell' '69 DT1'Dunger from Hell, '69 Cheney Yamaha 360, 70 Maico 350 (2 off), '68 Hindall Ducati 250, Hindall RT2MX, Hindall YZ250a , Cycle Factory RT2MX flat tracker, Yamaha 1T250J, Maico 250 trials, '71, Boyd and Stellings TM400, Shell OW72,750 Yamaha

Offline Freakshow

  • Superstar
  • ******
  • Posts: 7277
  • Adelaide, SA - looking for a "YZA" tank
    • View Profile
Re: DT1 Carby
« Reply #4 on: August 26, 2011, 01:18:03 am »
32mm or 34mm
buy a VM 200 or 400 ( have to look at the number) off the shelf rubber Mukuni rubber mount. bolts stright on and in, no messing around or drilling required ( can give part number or just buy from IWT and post.
I can give you the jet specs in a PM if you like, im almost built mine and will recheck with a flat jet run this weekend on a 32mm the others are really too big and the air ratio get out of whack for mx you might be able to pull it in a DT but keep under 34mm to get eh response and pull out of it.
remember PPort will need a fat pilot and a lean main, remember MUkumis are cumlative .
« Last Edit: August 26, 2011, 01:20:05 am by Freakshow »
Logged
74 Yamaha YZ's - 75 Yamaha YZ's
74 Yamaha  flattracker's
70  Jawa 2 valve speedway's

For sale -  PRE 75 Yamaha MX stuff, frame, motors and parts also some YAM DT1,2,A and Suzi TS bikes and stuff
Pages: [1]   Go Up
« previous next »