upgrade carb on mild 420cc?

[1201]

hi, ive got a 420cc with stock cam ,forged rod and billet flywheel. it runs very strong to about 6000 rpms with the stock 21mm carb.

i want to know if i will see significant gains by going to a bigger carb, and if so , which one would be recomended.

thanks

 

[deanefoxjr]

Try a 22 or 24mm mikuni carb. Ask around with some of the other mini bike guys and see what they say.

 

[Stangrcr1]

I had a 22 Mikuni flatslide on my 390 and it did well, once I got the jetting figured out.

For riding, I would use the 22.

For racing, 24 or maybe bigger.

 

[iwillvoice]

Chu?c ca?c ba?c ba?n ha`ng tô?t

 

[Camjamsdad]

Chu?c ca?c ba?c ba?n ha`ng tô?t

That's the greatest 1st post I've ever seen anywhere. Congrats!

 

[Camjamsdad]

hi, ive got a 420cc with stock cam ,forged rod and billet flywheel. it runs very strong to about 6000 rpms with the stock 21mm carb.

i want to know if i will see significant gains by going to a bigger carb, and if so , which one would be recomended.

thanks

Is there a reason for keeping the stock cam? If not, that's the first place I would go for more power. The bigger carb would be minimal gain with a stock cam

 

[Prowler08]

Just bore out the carb you have now to 24mm...

 

[samevansjr]

You are limited with the stock cam. I'm surprise you are getting 6,000 rpm's with that stock cam & carb. I would go with a bigger cam then a Tillotson carb.

 

[outlaw17]

Tillotson carb would really pick up some power. I have intake for 390 and tilly carbs. Measage me or text 2084404478

 

[1201]

hey guys, a 30mm carb and everything else stock picked it up 5hp