Print Page - Mikuni for '75 250 HS

Title: Mikuni for '75 250 HS
Post by: seanguthrie on February 21, 2014, 11:41:31 AM

I've been at the end of my rope with my old Bing for the last 3 seasons. I finally have enough funds stashed away to purchase a Mikuni. I've done a bit of research and I think what I want is a 36mm VM Mikuni?

I've also read somewhere about a few altercations I may need to make to my air box? Can anyone verify that or will it mount right up like the Bing?

I had planned to get a Mikuni before the race next weekend, but may be forced to run the Bing one last time as the clock is ticking. If anyone knows where I can purchase a new one with 1-3 day shipping I may be in shape. Thanks in advance.

74 250 Hare scramble
73 CMF 6day
68 6day V213

Title: Mikuni for '75 250 HS
Post by: Tom Murphy on February 21, 2014, 12:48:43 PM

Sean, try Mark Thompson at Bear Motorsports. His phone number is (513) 969-6997 or [email protected]

Later, Tom

Title: Mikuni for '75 250 HS
Post by: seanguthrie on February 21, 2014, 02:47:17 PM

Thanks for the contact Tom, and do you know if I'm correct in thinking that a 36mm is the one I want?

74 250 Hare scramble
73 CMF 6day
68 6day V213

Title: Mikuni for '75 250 HS
Post by: Dale Sonnenschein on February 21, 2014, 05:31:45 PM

I put one on my 74.5 Had to modify the air boot. It replaced a worn out bing.

74 puch 175 SD
73 Husky 360 WR/RT
76 Husky WR360
10 ktm 250xc
02 bmw r1150r

Title: Mikuni for '75 250 HS
Post by: Doug Knight on February 21, 2014, 10:09:43 PM

I am in the middle of a 36mm installation and will have some pictures late this weekend for you.

Title: Mikuni for '75 250 HS
Post by: Mick Milakovic on February 22, 2014, 01:07:50 AM

Sean, do a search of "mikuni harescrambler" and you'll find some great tips. I've got a 34 on mine, no air box changes and I use a radiator hose to mate the carb outlet to the manifold. The bikes starts and runs great, and it has more pulling power than I can handle. FYI, I'm not that fast!

Mick

Title: Mikuni for '75 250 HS
Post by: seanguthrie on February 26, 2014, 03:40:55 PM

Thanks for all the info. Looks like I'm going to run the Bing at least one more race weekend. I'm going to check in to the Mikuni when I get back. I had way too much on my plate leading up to this race weekend.

74 250 Hare scramble
73 CMF 6day
68 6day V213

Title: Mikuni for '75 250 HS
Post by: tomale on February 27, 2014, 12:27:31 AM

Do a search, I did a swap 9 or so years ago, my what a difference. I have listed everything you need to know about how to jet the bike

Thom Green,Still crazy after all these years!
76' 250 MC5 (orginal owner)
74' 1/2 440 maico
70' 400 maico (project)
72' cr125 Husky (project)
93' RMx 250 suzuki
Honda TL 125
2004 Suzuki DL1000

Title: Mikuni for '75 250 HS
Post by: Mike Hufnagel on February 27, 2014, 12:53:53 PM

I've done the same thing, but had to go down a size on the slide. It had GEM reeds and an ace pipe. In hindsight I would have opted for the 34 as the 36 was bored out to 36.5mm and I had case clearance problems with the carb with the 36 not to mention lining up and modifying the airbox to fit the angle of the carb.

'12 Husaberg TE300
74 Yamaha TY 250
84 Yam IT200
75 Jackpiner w/ 250 eng.
82 KTM GS250II (import)
82 KTM 495 (2)
98 KTM 300mxc
12 Ktm RC8R
00 KTM Duke 2/rd. racer
06 KTM 950 Adv.
08 Suzuki DR70Z

Title: Mikuni for '75 250 HS
Post by: Mike Hufnagel on February 27, 2014, 12:53:53 PM

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General Discussion => Penton Talk => Topic started by: seanguthrie on February 21, 2014, 11:41:31 AM