34mm PJ

12cc2

Member
Apr 21, 2020
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Kansas
Hello all, so I know this has been asked before but as I’ve just been lurking and soaking up knowledge I haven't interacted enough with others to gain ability to message and such, so figured I’d ask for starting recommendations for jetting on my specific application, I’ve got 150-162 mains, 48-52 pilots, DGH needle and 6.0 slide

stock bore
VForce 4 reeds
Pro design 34mm boot
Modified stock air box with K&N filter
Alien DMC exhaust
Oil injection deleted
32:1
2,500 elevation
 
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Thanks Larry I have looked through there couple times, havnt seen much on the DMC pipe/34mm combo but I’m sure I’ve missed some and I’ve read other posts about the 34PJ that’s where I came up with the range of jets to start out with, if I was planning on running stock bore/stock port I wouldn’t have went up to a 34mm but I’ve got a KOR ported jug and rechambered head ready to go on just want to get a baseline tune on the stock one so I don’t fry the thing running super lean while it breaks in lol
 
@ your elevation, in this order only, you must start at the bottom and work up thru the jetting ranges .....

set/check your float height
https://www.blasterforum.com/threads/float-heights-and-how-to-adjust-them.50565/

start with the 48 pilot find highest idle between .5 and 2.5 turns out, above 2.5 needs leaner, below .5 needs richer
https://www.blasterforum.com/threads/adjusting-your-airscrew-pilot-jet.51060/

DGH needle on the middle clip slot, DMC pipes are known to like a rich needle on the stock carb, but my 34PJ liked the middle slot here at a lower elevation, so you'll be richer at your higher elevation. (you can also do 1/2-3/4 throttle plug chops to confirm the needle jetting)

Mine also ran a 155 summer/162 winter here @ 1800' with more free flowing air/pipe, I wouldn't hesitate to do a plug chop with a 150/152 for your mods.

Plug chops are your friend, do them and not fry anything with one wide open run.
https://www.blasterforum.com/threads/how-to-plug-chop.53237/
 
Awesome Awk08 was hoping you would chime in as I’ve kinda seen your the master of these carbs lol thanks so much this will give me a great starting point, will plug chop to perfection after that
 
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