Angled Mikuni carb mount - ArcticChat.com - Arctic Cat Forum

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post #1 of 39 Old 02-05-2010, 05:33 PM Thread Starter
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Looking to see if there is anyone making carb mounts so you can run a Mikuni on a sled that has the stock manifold tilted up? Motor is a Kohler 295 twin, has the HD size flange on it now. The Mik VM34 carb I was planning to use won't work unless it sits level. Any ideas, or have a good Mik off a late '70' Cat motor? Thanks
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post #2 of 39 Old 02-05-2010, 11:13 PM
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I dont know where to get one but you can make one using a piece of tube bent at appropriate angle and mounting flanges welded on the ends to make the bend, i have seen others use a piece of like radiator hose the appropriate diameter and angle. On another forum a guy said it took him 20 + years to find 3 of the exact same factory made angle adapters for his triple sled so a factory made one could be out of the question.
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post #3 of 39 Old 01-27-2011, 11:51 AM
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My solution

I am also doing a retrofit of a Walbro WDA to a Mikuni 34mm VM on a '73 Panther 399cc. Here is what I am doing:
Mount to the intake the straight flange included in the Mikuni retro kit
ADCRK200 from this site:
Walbro Carburetor Parts

To this, I will add a 1.5" long 1.6" OD tube so that it will accept the angled flange fitting from:
Mikuni Tube-Style Carb Mounting Flange for 30-34mm Carbs - DennisKirk.com

This will then accept the new Mikuni carb.
Everything is snugged up with correct sized hose clamps included with the flange and Mikuni kit.
It should be nearly level when mounted.


Last edited by Waterpower; 01-27-2011 at 05:03 PM.
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post #4 of 39 Old 01-27-2011, 07:42 PM
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Waterpower,
So you are saying that your 73 cat with a 399 kawasaki intake has too much of an angle to just put a mikuni flange and carb?
My 72 arctic cat panther/Kawasaki 440 accepted a 38mm mikuni with just a mikuni rubber flange!
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post #5 of 39 Old 01-27-2011, 08:32 PM
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Mikuni made some 38MM carbs w/ angled float pins which will work for motors tilted approximately 15 degrees or so. I've got one on my 72 Panther w/ a 440 Kawi twin and it goes great. I used a standard Mikuni adapter. There was also a company that made the angled adapters you're looking for back in the 70's & 80's and I think they were called JEM. Sometimes you'l find an old race guy that has some. If it were me, I would go for the carb w/ the angled float pins to keep it simple. Good luck !
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post #6 of 39 Old 01-27-2011, 08:56 PM Thread Starter
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I ended up just bolting the Mikuni flange right to the Kohler intake. Has a slight angle to it, runs fine uphill, downhill, and sideways (son tipped it over on a snowbank). Pulled the studs out of the intake and used Allen headed bolts that gave a bit better clamping force.
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post #7 of 39 Old 01-28-2011, 10:11 AM
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This might help why the angle concern

Original: Here is an actual picture of the Walbro WDA angle before a Mikuni swap on a '73 Panther 399. (I've included a 25 deg. comparison angle in the lower right corner.) The angle is very near the maximum Mikuni spec for 34mm VM's.

Update: I have finished my install by combining with an angled flange with the straight one bolted to the manifold. Now you can see before and after with a only minor angle per the spec.....the new Mikuni carb makes all the difference. It started this morning at -18 deg F. with choke on the first crank!.. Plugs are a nice normal tan color after a 5 mile cruise on the lakes. Great top end & nice smooth acceleration. I also integrated the new choke lever type to the dash where the old pull one was. Also was able to modify the throttle cable so it also works with the stock throttle lever and throttle tension switch.

I struggled with that old Walbro WDA way too long and it never ran this well even when the machine was new (38 years ago!)

Last step will be to add a K&N 4" washable round filter.
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Last edited by Waterpower; 02-11-2011 at 04:15 PM.
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post #8 of 39 Old 01-28-2011, 10:52 AM
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Ok,so just a thought for those who don't have the mikuni with angled float pins and want to convert a Kawasaki engine. Would it work to just flip the intake upside down to flatten the trajectory?
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post #9 of 39 Old 01-28-2011, 02:10 PM Thread Starter
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Then you would be angled down the same amount/angle, no? A 180* flip of the intake would just reverse the angle, not eliminate it......
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post #10 of 39 Old 01-28-2011, 02:35 PM
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I don't know because the engine is mounted at a pretty good angle! From looking at it, it seems like flipping it 180' would flatten it right out. That would be awesome if it'd work. Sure would save a lot of trouble!
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