Different carbs for Vtwin performance

slonomo · 01-01-2015, 01:36 PM

Just trying to do some research about different carburetor options for the Vtwins. I have seen the 2 barrel setups, and I like that they are stock setups on the bigger engines. But I'm wondering if anyone has ever used a motorcycle style carb for these? I've seen some of those mud boat motors using them, but not sure what size they are. Any ideas?

I have a 32 mm cv type carb I was using on the clone, wondering if it would work or not? Obviously it's bigger than the stock carb so it should be better right? What adapters are available?

Edit: it's a 32mm not a 30mm

1989Marathon · 01-01-2015, 01:41 PM

Andy,
The mud buggies use really big carbs on the highly modified motors. I think some are running twin 38mm carbs.

A stock Briggs 2 barrel has two 21mm venturis. It will flow much more than the single 30mm you have.

slonomo · 01-01-2015, 01:45 PM

Ok understood. Is it even worth trying to make this carb work? Or would the cost getting the parts outweigh the benefits? For all I know that carb I have is junk, but if it won't cost a lot it might be worth a try.

1989Marathon · 01-01-2015, 01:52 PM

It'll be better than the stock single carb, but not as good as the 2-barrel.
Now if you ran dual 30mm????

slonomo · 01-01-2015, 02:03 PM

Wow! Dual carbs? Sheesh!

So what kind of parts would I need to try this? Would I have to switch to the 2bbl intake anyway? Or is there an adapter of some sort?

1989Marathon · 01-01-2015, 02:04 PM

There is an adapter for mounting the Mikuni directly to each head.

slonomo · 01-01-2015, 02:11 PM

Ok well I don't want two carbs.

Are there adapters for one?

1989Marathon · 01-01-2015, 02:16 PM

I've see a single carb mounted on a mudbuggy motor. I don't know if the adapter mounts to the stock intake, or replaces the intake.

slonomo · 01-01-2015, 02:22 PM

I'm searching now, see lots of twin carbs, but no singles. Wonder if I could make an adapter to replace the carb I have now? Do you know what size the 16hp intake is?

1989Marathon · 01-01-2015, 02:23 PM

You mean the hole in the top of the intake?

01-01-2015, 01:36 PM	#1
slonomo Searching for The Way Join Date: Oct 2009 Location: Medina, Ohio (NEOHIO) Posts: 11,436	Different carbs for Vtwin performance Just trying to do some research about different carburetor options for the Vtwins. I have seen the 2 barrel setups, and I like that they are stock setups on the bigger engines. But I'm wondering if anyone has ever used a motorcycle style carb for these? I've seen some of those mud boat motors using them, but not sure what size they are. Any ideas? I have a 32 mm cv type carb I was using on the clone, wondering if it would work or not? Obviously it's bigger than the stock carb so it should be better right? What adapters are available? Edit: it's a 32mm not a 30mm

01-01-2015, 01:41 PM	#2
1989Marathon Gone Wild Join Date: Oct 2010 Posts: 6,730	Re: Different carbs for Vtwin performance Andy, The mud buggies use really big carbs on the highly modified motors. I think some are running twin 38mm carbs. A stock Briggs 2 barrel has two 21mm venturis. It will flow much more than the single 30mm you have.
1989Marathon Gone Wild Join Date: Oct 2010 Posts: 6,730

01-01-2015, 01:45 PM	#3
slonomo Searching for The Way Join Date: Oct 2009 Location: Medina, Ohio (NEOHIO) Posts: 11,436	Re: Different carbs for Vtwin performance Ok understood. Is it even worth trying to make this carb work? Or would the cost getting the parts outweigh the benefits? For all I know that carb I have is junk, but if it won't cost a lot it might be worth a try.

01-01-2015, 01:52 PM	#4
1989Marathon Gone Wild Join Date: Oct 2010 Posts: 6,730	Re: Different carbs for Vtwin performance It'll be better than the stock single carb, but not as good as the 2-barrel. Now if you ran dual 30mm????
1989Marathon Gone Wild Join Date: Oct 2010 Posts: 6,730

01-01-2015, 02:03 PM	#5
slonomo Searching for The Way Join Date: Oct 2009 Location: Medina, Ohio (NEOHIO) Posts: 11,436	Re: Different carbs for Vtwin performance Wow! Dual carbs? Sheesh! So what kind of parts would I need to try this? Would I have to switch to the 2bbl intake anyway? Or is there an adapter of some sort?

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01-01-2015, 02:04 PM	#6
1989Marathon Gone Wild Join Date: Oct 2010 Posts: 6,730	Re: Different carbs for Vtwin performance There is an adapter for mounting the Mikuni directly to each head.
1989Marathon Gone Wild Join Date: Oct 2010 Posts: 6,730

01-01-2015, 02:11 PM	#7
slonomo Searching for The Way Join Date: Oct 2009 Location: Medina, Ohio (NEOHIO) Posts: 11,436	Re: Different carbs for Vtwin performance Ok well I don't want two carbs. Are there adapters for one?

01-01-2015, 02:16 PM	#8
1989Marathon Gone Wild Join Date: Oct 2010 Posts: 6,730	Re: Different carbs for Vtwin performance I've see a single carb mounted on a mudbuggy motor. I don't know if the adapter mounts to the stock intake, or replaces the intake.
1989Marathon Gone Wild Join Date: Oct 2010 Posts: 6,730

01-01-2015, 02:22 PM	#9
slonomo Searching for The Way Join Date: Oct 2009 Location: Medina, Ohio (NEOHIO) Posts: 11,436	Re: Different carbs for Vtwin performance I'm searching now, see lots of twin carbs, but no singles. Wonder if I could make an adapter to replace the carb I have now? Do you know what size the 16hp intake is?

01-01-2015, 02:23 PM	#10
1989Marathon Gone Wild Join Date: Oct 2010 Posts: 6,730	Re: Different carbs for Vtwin performance You mean the hole in the top of the intake?
1989Marathon Gone Wild Join Date: Oct 2010 Posts: 6,730

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