Help me ID this mikuni carb... - Wrist Twisters
 
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post #1 of 25 Old 10-07-2013, 03:02 PM Thread Starter
Ian
 
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Help me ID this mikuni carb...

Ok so I made the mistake of offering a carb clean for a co-worker. Carb came off his modified '99 Yamaha Wolverine ATV. The bike was modded by a previous owner and has a 400cc big bore kit, hot cams and this mystery mikuni carb.

I can't find a part number of any sort of ID on the castings. It just says mikuni corp on a few spots and thats it. It seems like a dedicated dirt carb, since the linkage and what not have snazy plastic dust covers.

Anyway any ideas guys....


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post #2 of 25 Old 10-07-2013, 03:18 PM Thread Starter
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Oh and the reason I am regretting this.....

- removed top coverr and found a sheared off "safety torx" on the slide guide/cage.

- and this is what the jets look like..... and it has a cracked float.


Ugh!


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post #3 of 25 Old 10-07-2013, 03:54 PM
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That is an odd one, at least as far as the dirt bike carbs I've seen over the years, but those were all two strokes. They always had the throttle cable at the top to pull up the spring-loaded slide and needle.

Good luck!

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post #4 of 25 Old 10-07-2013, 04:08 PM Thread Starter
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Yeah same here Ottawa.

After a little google pic search ... it kinda/sorta looks like a BST34 which came stock on a SR500 Yamaha.... but newer and more dirt oriented.

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post #5 of 25 Old 10-07-2013, 04:52 PM
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Good luck Heli, that's a new one in my book....

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post #6 of 25 Old 10-07-2013, 04:54 PM
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that carb just needs to be thrown away.... those jets... my god!


i am surprised theres no identifying markings on it.

looks very similar to this one

http://www.ebay.com/itm/Brand-New-Ge...3bf97b&vxp=mtr

or this one

http://www.ebay.com/itm/Genuine-Made...419087&vxp=mtr

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post #7 of 25 Old 10-07-2013, 05:09 PM
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Garage
This looks similar too. BST 34

Brand New Genuine Mikuni BST34 263 Carburetor Fits Polaris Sportsman 700 | eBay

'96 DR650, '01 SV650, '10 Aprilia Tuono 1000R
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post #8 of 25 Old 10-07-2013, 05:52 PM Thread Starter
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Thanks for the links guys!

Its came apart fine and should clean up nicely. The jets will be fine, I am using my secret weapon!



An old hotrod mechanic pointed me towards this stuff a few years back. It is a miracle worker on varnished old parts and jets. Just spray and soak.

Stay tuned for some morning update pics after the jets soak overnight.

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post #9 of 25 Old 10-07-2013, 06:14 PM Thread Starter
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Quote:
Originally Posted by Superdog View Post
Found one!!!

Listed on ebay as a stock 02-05 wolverine carb.

http://www.ebay.com/itm/02-03-04-05-...0eab39&vxp=mtr

His bike is a '99, not sure why they swapped it out but anyway this puts me in the right direction to find a parts list and break down. Basically I just need to find a float and maybe a few other bits.

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post #10 of 25 Old 10-07-2013, 06:42 PM
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post #11 of 25 Old 10-07-2013, 07:39 PM
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Does that cleaner work any better than lemon juice?

carb.jpg

...must clarify, because lemon juice has worked better than ANYTHING I've ever tried. Next time I'll make sure to cover the steel parts, though, as they are now rusting :-D

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post #12 of 25 Old 10-08-2013, 04:53 AM Thread Starter
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Quote:
Originally Posted by g00gl3it View Post
Does that cleaner work any better than lemon juice?

...must clarify, because lemon juice has worked better than ANYTHING I've ever tried. Next time I'll make sure to cover the steel parts, though, as they are now rusting :-D
Well soaked the jets overnight in the Mopar penetrating fluid. The fluid starts out honey golden.... by the morning it was hulk green and this is what they looked like before & after




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post #13 of 25 Old 10-08-2013, 09:06 AM
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Wow, VERY nice! Is it safe for the rubber stuff? That's one thing the lemon juice is NOT kind to.

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post #14 of 25 Old 10-08-2013, 10:22 AM Thread Starter
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It is safe to use on fuel spec rubber seals. Although I would recommend "use with caution".

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post #15 of 25 Old 10-10-2013, 03:21 PM Thread Starter
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Picked up the new float and finished the carb clean & overhaul tonight. Overall it cleaned up pretty good, which is amazing since the poor thing had been neglected hardcore and beaten and abused by some previous attempts at servicing. Should be reinstalled and running for the long weekend.

Before...


After...


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post #16 of 25 Old 10-10-2013, 03:33 PM
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wowwww, gotta get me some of that stuff. Especially if it doesn't hurt plastic/rubber.

2009 Aprilia Tuono - Ginger
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2006 Honda 599 - Ex wrecked it :-D
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post #17 of 25 Old 10-10-2013, 03:46 PM Thread Starter
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Yeah it's great stuff man. Plus at the Dodge dealer its only $4-$5 a can!?!?!

I use old food tubs to soak parts in, and collected the leftover fluid strained it though a paint strainer and put it in a glass bottle for next time round.

Seriously this is the Rotella of the carb world.....secrets out I guess.

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post #18 of 25 Old 10-10-2013, 05:15 PM
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wtf lies..... those are two different carbs.

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post #19 of 25 Old 10-10-2013, 06:13 PM Thread Starter
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Haha ... nope same one.

You should see the rack i did for a co-workers cbr900rr they turned out beautiful.

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post #20 of 25 Old 10-10-2013, 07:28 PM
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Quote:
Originally Posted by HeliMech View Post
Haha ... nope same one.

You should see the rack i did for a co-workers cbr900rr they turned out beautiful.
Pix of rack or didn't happen...

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post #21 of 25 Old 10-11-2013, 04:01 AM Thread Starter
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Sorry no pics of that set. Now you two fuck off and find a noob to troll. Haha. J/K.

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post #22 of 25 Old 10-11-2013, 06:02 AM
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MORE picks of racks.....dont let it be said, that I dont like some racks.

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post #23 of 25 Old 10-12-2013, 05:45 AM Thread Starter
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Carb is reinstalled and the quad is purring like a kitten. It pulls really hard and is lots of fun!

Think I might need to add something like this to my toy box next. =)

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post #24 of 25 Old 12-10-2013, 05:28 PM Thread Starter
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Bump for a friend.

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post #25 of 25 Old 12-07-2014, 07:06 PM
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Amazing turn out! I think I will head over tomorrow as all of the dealers are closed on Sundays here is Colorado.

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