Mikuni TM alky jetting

5439 Views 15 Replies 8 Participants Last post by BBIII, Jul 14, 2008

dajogejr

Discussion Starter · Jul 3, 2008

My boy is getting some Mikuni Alky carbs, need some starting points for him to get them on meth.
These are gravity carbs, billet bowls and Dave Moore Super Jets.
He's running a 4 mil cub on alky drag ported 4 mil cub. He's in San Diego, but rides at Pismo and Glamis.

I have no idea where to start on pilot, needle, dump or main....

I know there are plenty out there that use Mikunis...can you give us a safe starting point. His first time on alky....

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Bansh-eman

· #2 · Jul 3, 2008

I'll be running on the pump. What needs to change to setup up for the pump?

421 drag ported, Shearer BB OOF, 38 TM's on pump, nology, dyna, domes, timing, yadda yaa all the regulars

phatboyz

· #3 · Jul 3, 2008

I run a 114 or 116 dump on my 41s cant remember exact;y which ,not sure on the dmr booster but I run mine all the way fat about 5 turns out although not sure like I said on how many turns out on dmrs what that would do I know mine runs better with the boosters all the way out then trying to lean them ,,the cubs like lots of fuel.

Bansh-eman

· #4 · Jul 3, 2008

QUOTE (phatboyz @ Jul 3 2008, 09:56 AM) index.php?act=findpost&pid=4432I run a 114 or 116 dump on my 41s cant remember exact;y which ,not sure on the dmr booster but I run mine all the way fat about 5 turns out although not sure like I said on how many turns out on dmrs what that would do I know mine runs better with the boosters all the way out then trying to lean them ,,the cubs like lots of fuel.
yea i talked with a buddy and he said he is running 118 dmps but is getting ready to go to a 116. What needle and pilot you running?

phatboyz

· #5 · Jul 3, 2008

dunno I have never opened them up,,I told kim I needed a set of mikuni carbs set up for alky with my motor he told me what I needed sent me the carbs and I slapped them on!LOL

dajogejr

Discussion Starter · #6 · Jul 3, 2008

QUOTE (phatboyz @ Jul 3 2008, 02:59 PM) index.php?act=findpost&pid=4441dunno I have never opened them up,,I told kim I needed a set of mikuni carbs set up for alky with my motor he told me what I needed sent me the carbs and I slapped them on!LOL

Hmm...that sounds like familiar advice....LOL...

(Told him the same thing Shannon. Kim is known for being a Mikuni guy, and could probably tell him the jetting he needs to run, give or take 10%...)

Bansh-eman

· #7 · Jul 3, 2008

I called K&T but they are out of the shop until Monday.

flea49

· #8 · Jul 8, 2008

QUOTE (bansh-eman @ Jul 3 2008, 01:53 PM) index.php?act=findpost&pid=4453I called K&T but they are out of the shop until Monday.
Drop your stock needle all the way down, Dump tubes 114 and so is the needle,DM Power jets 1 and 1/2 turns out.

Dave I.

· #9 · Jul 9, 2008

why dont you just ask the your builder....

Bansh-eman

· #10 · Jul 9, 2008

QUOTE (Dave I. @ Jul 8 2008, 08:44 PM) index.php?act=findpost&pid=4807why dont you just ask the your builder....
he doesnt like mikunis , he's pwk kinda guy

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KaosBanshee44

· #11 · Jul 9, 2008

What are your plans with everything Dave?

bada450r

· #12 · Jul 9, 2008

QUOTE (bansh-eman @ Jul 8 2008, 08:48 PM) index.php?act=findpost&pid=4808he doesnt like mikunis , he's pwk kinda guy

i just did a little researched and you should be running
dumps.........needles.................clip
118 6fj41[002-713] mid.....or you could run this
116 6dpa[002-341] one clip above the fattest position and dont go above mid clip[i wouldnt]
[sudco #]
you can order the needles from sudco but the dumps and mains youre going to have to oder from knt or lynn
www.sudco.com......800-998-3529...........the needles for the 116 are a little smaller and allow for more fuel therefor running smaller dumps....the 118 needle is a little bigger and you get the point.......do not run anything below 116 or you will burn your motor....by the way myself and tony have always run the 118 combo on our 421 with no problems......by the way i dont know what done to the seat for it to work with the pump since this carbs are gravaty feed

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dajogejr

Discussion Starter · #13 · Jul 9, 2008

Ok, what about pilots and mains?

bada450r

· #14 · Jul 9, 2008

QUOTE (dajogejr @ Jul 9 2008, 03:25 AM) index.php?act=findpost&pid=4812Ok, what about pilots and mains?
i think pilots are 50 or 55 and mains get drilled out with the dump tubes so same size mains

dajogejr

Discussion Starter · #15 · Jul 14, 2008

As a followup Bada...
I talked to Kim @ K&T...and I'm posting here for reference...

.118 dumps and mains, from a 55 to 60 pilot, 1.5 on the air screws....and a 1.8 needle and seat for him to run a fuel pump.

As always, Kim was extremely nice, took his time to answer my questions and ask a few of his own. As busy as he is, he took that 5 minutes...which is critical in this sport. I was very appreciative of that....

BBIII

· #16 · Jul 14, 2008

Yes Kim is a Top notch guy for sure.

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