RAT CAT DUAL MIKUNI CARB SWAP
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- čas přidán 7. 09. 2024
- FOLLOW ALONG WITH THIS MIKUNI SWAP ON T1B340 KAWASAKI FAN ENGINE
Personally I found a lot of this at swap meets and with parts sleds but providing links to purchase new as reference. This took me better part of a year and a half to gather together. This was a very challenging build. IF you are going to do a single carb swap, I do not have a solution for the 30 Degree angle your carb will be sitting at. I have a solution in the works, but for now...... You will have to fabricate a flange adapter similar to the GEM adapters which are no longer available. More to follow on that topic in future. Good luck on your conversion!!!
MIKUNI FLANGE ADAPTERS-MOST DIFFICULT ITEMS TO FIND…… PN 0109-462 FIND AN ELTIGRE GURU WITH LOTS OF T1C340RSIA ENGINES ON THE SHELF. THE QUAD PLUG 400 AND 440 ENGINES ARE DIFFERENT. NEED TO BE 73/74 ELTIGRE 340 INDUCTION FLANGE ADAPTERS!!
DUAL THROTTLE CABLE (DK PN 943)
www.denniskirk...
DUAL CHOKE CABLE (DK PN 146-2)
www.denniskirk...
CHOKE CONVERSION FROM LEVER TO CABLE (OR IF MISSING) (DK PN MK-412) (MIKUNI PN VMCK)
www.denniskirk...
VM34 CARB FROM DENNIS KIRK. UNIVERSAL SO WILL NEED TO OBTAIN JETS ACCORDINGLY. (DK PN VM34-289) www.denniskirk...
MIKUNI JETS AND INTERNALS. PURCHASED FROM BOBS CYCLE SUPPLY, ST PAUL, MN 651-482-8181 WAS DIFFICULT TO FIND EVERYTHING I NEEDED IN ONE SPOT. YOU MAY HAVE TO FIND SEVERAL SOURCES TO MATCH JETS AND THE LIKE (AMAZON, E BAY, DENNIS KIRK, ETC..)
ANY AND ALL OF THESE COULD BE CHANGED AFTER SOME RUNNING AND TESTING. THIS IS THE BEAUTY OF THE MIKUNI PLATFORM.
PILOT JET-25
NEEDLE JET-116-P-0
MAIN JET-250
NEEDLE-6DH4
INTAKE RUBBER CARB FLANGES (MFG SUPPLY PN 465-1)
www.mfgsupply....
OVERHAUL GASKET SET (DK PN 09-711033)
www.denniskirk...
**OR**
TOP OVERHAUL GASKET SET
www.ebay.com/i...
MIKUNI FLANGE ADAPTER GASKETS (OEM PN 3000-654)
www.ebay.com/i...
ALSO TRY JERRYS NOS CAT PARTS
MIKUNI FLANGE ADAPTER BOLTS (SOCKET HEAD CAP SCREW) M6 X 1.00 X 25MM LENGTH HILLMAN PN 161-2482
www.mcmaster.c...
MIKUNI DUAL FUEL PUMP (DK PN DF52-176)
www.denniskirk...
I did a single mikuni on my 400 Cheetah years ago. I found another intake manifold, cut it at an angle and flipped the flange over and had it welded back up to level the carb. Pressure tested it and bobs your uncle. It worked great.
An adjustable throttle cable will customize throttle travel...... Wahl Brothers Racing Products
"Safety's dumb!" LOL!! Really great vid! Super clear and informative. You're craftsmanship and attention to detail is top notch. As always, really enjoy your content. Thanks!!!!
PS: My urge to buy an old Arctic Cat gets bigger and bigger with every vid you have been putting out recently ...and I bleed yellow!
Someone I know recently said that on the Arctic Cat grounding circuit. I thought it was kinda funny. Thanks Matt. Bout done with mods for the year but working on a couple more. Thanks for the nice comments and I get bleeding a particular color…. I’m too lazy to switch brands as I have so many spare parts. Buying a blue or yellow or whatever will just start the whole process over again. Collecting and hoarding spares x2. Ugggh
Hey, I just finished watching all your videos and you are doing a great job. I’ve been preserving and restoring sleds for 36 years and it’s nice to watch such Informative and entertaining content such as yours.
Keep up the good work!
Phil
Wow Phil, that really floors me. Thanks so much for the nice comments. I don’t have ALL the answers but hopefully I come close. Lots of decent content out there for sure. Red necks and Dirty Hands, Todd Kline, Matt’s Workshop, 2 Cylinder Will…, all doing neat stuff. Thanks again.
I bet you can't wait for the first rip!
Actually I’m pretty excited for better starting, better on the trailer, all that! So YES!
Sweet install. Everything is nice and tidy. I love the safety wire hose clamps.Sled runs awesome !
Thanks Rick. The worm clamps are no go at that size and finding the correct spring clamps is hard. I’ve got a handful of spring clamps and unless you have the super thick wall poly hose they are useless. The double or triple wrap safety wire works perfectly giving a nice seal. You can tell I redid the lines a 2nd time as they turned to yellow Tygon vs the clear. It wasn’t nylon according to the package but immediately turned cloudy and rock hard. Tossed it. At -10 that would of been a disaster.
Wow that runs sweet.
So far so good. We’ve only had super heavy wet snow and high temps here in WI so far so not real sure if jetting is perfect or not. Cold temps coming and will do some more testing soon
I purchased three early 70s cats that came with the Mikuni carb swap. The rubber boots are angled correctly with what appears to be a factory rubber boot,. So someone or Actic Cat made these boots for these carbs. Apparently the previous owner was not able to come up with a throttle handle solution. Thanks for giving us the detailed info to do this conversion.
Clarification. I am referring to the Mikuni single carb conversion on my 71-72 Cats
I’d sure like to learn what the proper angled boot is. Anyone??!?!??? That would save a lot of brain damage for sure. I might make a 20-25 degree adapter as an experiment similar to the old Gem adapters, and do a single VM34 on my 73 Panther. For now… I’m pretty happy how things turned out.
@@Letsfixsomething26 My carbs are horizontal to the sled so I am assuming that can't be bad given that the float bowl is horizontal. Right or wrong, someone intended for it be that way. All three of mine look like someone added an additional rubber manifold to the original rubber manifold making the manifold about twice the length and setting the carb on a horizontal plane with the sled. I am noticing slight cracks in all the rubber manifolds so these must be some older parts that have aged.
Great project
It had its challenges but worked out awesome for sure. Thanks for the comment
Machine the gasket side of your aluminum adapter the required degrees. Then you're going to find those holes on the flange will require a slightly obligated bolt hole to arrange a secure tightening.
Works great...By the way, Wahl Brothers can hook you up with rubber Mikuni carburetor mounting flanges, complete to eliminate the aluminum adapter.
Wahl bros. On it. Stand by
I scoured the site. They got lots of bad ass stuff but not finding what your laying down. Post a link maybe or possibly shoot me a message from contact info.. thanks!
@@Letsfixsomething26 ? My suggestion wasn't meant as a belittlement just merely trying to help. Wahl Brothers is a respected name in Arctic Cat snowmobile racing and they are a huge supplier of snowmobile parts.
@@jeffreyhagelin3672 oh gosh no offense taken.. not one bit. I meant I was all excited to see if they had the T1B flange adapters or a curved rubber boot adapters. If they have that let me know. Thanks so much for commenting! I sure wish someone made tipped rubber adapters at maybe 15-20 degrees. That would solve a lot of brain damage
@@Letsfixsomething26 No link is required ..The Mikuni carburetor section covers everything from flanges to Jets and then they have a parts department to answer any questions.. you're very welcome
Nice.. it purrs like a cat.
I’d counter with…. Purrs like it should. TBD how it rides. That Walbro on this one was always plagued with a bad bog and intermittent idling.
@@Letsfixsomething26 I have 3 Walbros on each Brut!
Ugggh, yea the 71 EXT guys have multiple Walbro carbs too. I dunno.. just had bad luck with them.
@@Letsfixsomething26 the walbros on a Brut are mounted in the downdraft position and there isn't a lot of options for carbs. I'm going to try some Mikuni super BN personal watercraft carbs on the next one.
You sled sounds really nice. I bet it'll be great to ride.
The tillotson on my one owner survivor 303 panther has been very dependable for the three seasons I've been riding that sled, but recently a friend of mine swapped his 303 over to a 36mm mikuni. Even though his tuning is not quite dialed, I'm converted! The mikuni makes starting so much easier, especially when hot, and the idle quality is 100% smooth and consistent. If my 303 swapped cheetah makes it out of the barn this year, it's definitely getting a mikuni. Not so sure if I can bring myself to modify the panther though...
Check, check, annnnd check. All the same reasons. I know a few Tilly guys who swear by them ans most of the time they are just fine….. Walbro…. Dunno. Do a video on your Mikuni swap on your 303!!!
@@Letsfixsomething26 I'm planning do do a mini series on the 303s before the end of January. I've revived 4 of them now and seem to have it down to a science. How to replace the crank seals and info on the mikuni swap are at the top of the priority list.
@@stephenh5166 oh hell yes. If you need any help along the video side of things reach out. A good mix of video and still shots, good narration and good lighting is the key. Again reach out any time! Looking foreword to it!
For the single Mikuni swap, there are different manifolds available that don't have the extra 15 degrees on them. Probably from a John Deere or a Kawasaki sled.
That would be great data to know for sure.
Love those adapters I have the scat pak on mine seems to work good. What handle stem set up I have going on ? Have a good one
Jeff, not grasping what your asking….
@@Letsfixsomething26 what handle bar set up is that did you change the post or add on
Oh gotcha. Great question. I cut the original bars at the weld and fabricated up a plate to accept a standard 7/8” clamp from let’s say a 90’s wedge polaris however the 90’s/2000 cats are similar. I found a 2.5” Powermadd spacer and added some bars that I stripped down from a cat I got at a swap. I’ve since added some slightly taller Pro Taper bars. Ultimately I’d like to have a single heavier post with thicker wall and eliminate the Powermadd spacer. The other thing is the bulkhead kind of reaches its limit from a strength standpoint as there is quite a bit of leverage going on. Vintsge cats and a chubby guy don’t get along much so I find myself standing more than sitting so on this sled I just configured it that way. My other sleds are all normal cat bars. Thanks for asking
@@Letsfixsomething26 very cool after seeing your video I’m going back for a redo on my set up, I’m running 32s off an eltigre 34s seem to b better we’re did you source those (new) interested in seeing it on the snow
They came with a project sled. Apparently they were off a polaris 600 but you can buy new ones from Dennis Kirk. If you look closely at the chart in the video the 295 Eltigre used VM30 carbs. The key reasons I went for it was I had carbs, and I knew exactly what jetting I wanted to use based on the same Kawi motor but in a free air. Meaning it gets me very close. So far it’s working mint but limited snow here in WI so got about 30 mins of tearing yard up.
What’s the right email to message you? Made a delrin spacer to level the mikuni carb off the stock y intake. Thought a picture might interest you. It’s a half hour project on a Bridgeport. Love your videos
It basically amounts to a standard isolator but thicker then cut to 15 degrees then 2 15 degree spacers so the nuts sit flush on the studs
Very interested in your mod. I have one more sled to do this to and planning on a single VM34
I wonder what that miss match in adapters is worth. But sometimes a smaller intake track helps low end snap. Also wondering if you could put a set of Reed's in there with the intake being square shape. Now are the jets in the dual carbs the same as what was in the single carb, or smaller? The sled seems to like that extra air though!
Eh, you might be over thinking it. It’s a win when a vintage sled starts and makes it back to the trailer under its own power. I am 100% not looking to achieve maximum power out of a 50+ year old Kawasaki. Mostly easier starting and smoother throttle response. Oh and to NOT melt down in the middle of the lake. As for single vs dual, skip to the end of the video for dual carb specs vs single carb specs. Hope that helps. Again I’m not racing this sled, I’m not trying to achieve any sort of max power extraction. Just fatigued at finicky pumper carbs… meaning hard starting, random fade of mixture settings, bogging, etc…
@@Letsfixsomething26 In that case, it still makes perfect sense. I'll finish watching the vid while I'm not at work. 😂 Could do this on my 1973 panther 400. Going to make one good sled out of three. Sled got parked because of walbro problems, and then crank seals. 😕
@@Trikekid84 I might have those specs for a 400. I also have a 73 panther that’s destined for same conversion. Need to fabricate an angled adapter and been working that topic in my head. You can reach me on the channel contact tab if you want to go to PM.
Never find these dawm flange adapters
They do pop up on the various FB groups occasionally.
Can you get away with using a Single Gas line Gas Pump with a T going to each carb?
I’m guessing it would but if you need to get a fuel pump, just get the right one. I have a triple pump that I got in a box of “stuff” and was going to use that but scored a double at a swap for cheap. Rebuild kits are like 15 bucks so no biggie there.
I wonder if anyone can help me?. I just bought a 72 Lynx 292 in amazing shape. The problem is it's Got some different stuff on it and I've got a bogging problem and because it's not stock I have no where to start. I need someone to look at it and tell me what I've got and how to fix it. An Arctic Guru. I live by St. Croix Falls.
Mike, I’m not much of a 292 guy but shoot me an E mail. Look on the contact tab of channel. Might need some photos to start with.