421 driveline lp jetting?

[jeremiahnelson15]

Anyone running stock carbs with 421 lp cylinders?  I am looking for a starting point on jetting at 1000' asl.  Also wondering if anybody has run this setup with stock carbs.

mods:

pc pipes

k&n pods

+4 timing

pro design cool head 23 cc domes

v force 3's

stock carbs

4 mil crank

assassin lp cylinders (as cast)

[gusto]

I'm going to guess at a 340 main and 27.5 or 30 pilot.

you absolutely should buy the driveline billet bowls for your stock carbs.

[STRIBZ]

Gusto is on the ball

 

im running them with stock carbs with

350main

needle "middle"

27.5 pilot

1 1/2 air/fuel screw

0-700 elevation

[Ayesully810]

15 hours ago, STRIBZ said:

Gusto is on the ball

 

im running them with stock carbs with

350main

needle "middle"

27.5 pilot

1 1/2 air/fuel screw

0-700 elevation

You got rid of your 35 pwks?

[STRIBZ]

still have them, just couldn't get them to run as crisp as my stockers.. thinking i may just get some billet bowls for these and be done.

 

how's your beast going?

[Ayesully810]

Im having an issue right now.. Ill update my post in the jetting section once I get it figured out.

[STRIBZ]

No worries mate, Good luck

[Ayesully810]

On 5/25/2017 at 0:41 AM, STRIBZ said:

No worries mate, Good luck

What needle are u running? 

[STRIBZ]

in the stockers or the 35's?

[Ayesully810]

in ur stockers

[STRIBZ]

can't remember to be honest, got them in a carb rebuild kit but have a better taper than stock does.

cleared up little bog i could never get rid of.. stock carb needles are rubbish!

[ginger]

i think the toomey needles is what most people run on stockers. 

 

[Ayesully810]

17 hours ago, STRIBZ said:

can't remember to be honest, got them in a carb rebuild kit but have a better taper than stock does.

cleared up little bog i could never get rid of.. stock carb needles are rubbish!

How does ur 421 run with the stockers compared to the 35s?

 

[STRIBZ]

runs good mate, snappy and quick..  gave up on the 35's as i couldn't get them running crisp.. to used to mikuni tuning i guess..

 

i just need to get different pipes to wake her up.

wouldn't mind some SLP's 

[Ayesully810]

were u havin issues leaning out the pilot ? Im dropping pilot sizes trying to lean out the bottom end its rich af. Was running great in the fall but was still rich and now that its summer its rich af now i dropped from a 52 pilot down to a 45 and its still rich. Im getting closer i think.