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Author Topic: 73 250 mikuni specs?  (Read 1806 times)

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Offline kiwiktm

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73 250 mikuni specs?
« on: March 18, 2012, 05:58:27 am »
Hi,  looking too put a mikuni carb on my 73 250,   has anyone got specs/ jet sizes carb size 36/ or 38mm?   cheers daz
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Offline ozktm

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Re: 73 250 mikuni specs?
« Reply #1 on: March 18, 2012, 07:46:41 am »
Head to www.pentonusa.org and search the forum. Lots of info on this.
Adrian
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Regards,
Adrian Goold #101

'72 KTM 175 |'74.5 KTM 250 |'74.5 KTM 400 |Hagon/KTM 250 proj|'76 MC5 250 Project |'76 MC5 400|'78 KTM 250 Project |'81 KTM 250 MC | '81 KTM 495 MC

Offline Husabergpete

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Re: 73 250 mikuni specs?
« Reply #2 on: March 19, 2012, 08:06:54 pm »
KK,

I have a 79/80 250 which has the older style motor similar to yours. These specs were used in a 36mm Mikuni I ran for 2 years.
 
Main - 290
Pilot -   35
Needle Jet - Q-2/159
Needle 6DH2
Slide - 2.5

Another contact from the NSW KTM crew gave me - Main 290 Needle 6DH7 or 6FJ6 and a pilot of 45 to 50 but I haven't used those settings.
I did have a 40 Pilot but it ran 100% better with the 35.

Pete # 100
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KTM 250 1980,  Maico 250 AW 1977, Husqvarna CR 430 1981, , CZ 250 1973 and a 550 Husaberg

Offline kiwiktm

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Re: 73 250 mikuni specs?
« Reply #3 on: March 22, 2012, 07:04:44 pm »
Thanks Pete,  i have 82 250 mxc & gs as well so may try on those two as well
I`ve spoken too Tom @ hattricks and got a carb in the post i think he has done similar jetting too a maico? with some changes
The specs you gave are very similar too a bored out vm34 (35.15)carb on POG site
i did have a GEM reed block on my 73 but have broken reeds so will just be running std manifold
Most appreciated Daz
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