421 Cub, 2 into 1

[b_sandgren]

I tried searching, but did not find much. Wondering what everyone is running in their 2 into 1 set up, I have a 421 cub with a single 38, 48 pilot and 220 main, 4000 ft elevation. Any help would be appreciated

[Bansh-eman]

non experiance from my side but from everything other have said cubs dont like single carbs they are all about gas and high rpm's your basically strangeling your cubs by going to one 38mm carb...

[r/atvshee]

theres someone on planet sand that got a single carb cub to 90..i dont remember what the bore and stroke was but i remember correctly it was on race gas :thumbsup:

[jeepman380]

I'm running a 35 PWK on mine with a 230 main and a 48 pilot if I remember right. I'm at around 1,000 ft. It seems to run a bit rich but it sure does run harder. Just got back from the dunes for the first time with my cub motor and man it runs really hard. Couldn't keep the front tires down up until I hit 4th gear. I'm really pleased with the 2 into 1. Yeah you can gain a few hp with duals but I had it on my old motor so I decided to go with and try it and i've had really good luck with it no matter what other people say.

[b_sandgren]

I'm running a 35 PWK on mine with a 230 main and a 48 pilot if I remember right. I'm at around 1,000 ft. It seems to run a bit rich but it sure does run harder. Just got back from the dunes for the first time with my cub motor and man it runs really hard. Couldn't keep the front tires down up until I hit 4th gear. I'm really pleased with the 2 into 1. Yeah you can gain a few hp with duals but I had it on my old motor so I decided to go with and try it and i've had really good luck with it no matter what other people say.

Yeah I love my two into one, jeff at fast racing actually recommended it for my type of riding, I have tried two carbs and I did not like it. I should be close with the jetting then... Wyotech have you ever had trouble running the bowl dry on long pulls?