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Workshop => Carburetor, Intake, and Exhaust => Topic started by: pantera1975 on June 26, 2014, 08:58:48 PM

Title: How big of carb for a 330?
Post by: pantera1975 on June 26, 2014, 08:58:48 PM

My friend wants a 38mm and I would sell hime mine if its wirh it to upgrade to a 41.5. Does this carb fit in the stock boot and where should I look to buy one.

Title: How big of carb for a 330?
Post by: supernutt on June 26, 2014, 09:13:00 PM

Went from a 38 to a 41.2 and it made a big difference.  Worth the money for me!!!

Title: How big of carb for a 330?
Post by: havinnoj on June 26, 2014, 09:33:56 PM

What type of riding do you do?

Title: How big of carb for a 330?
Post by: Jerry Hall on June 26, 2014, 09:34:29 PM

Quote from: pantera1975;37685

My friend wants a 38mm and I would sell hime mine if its wirh it to upgrade to a 41.5. Does this carb fit in the stock boot and where should I look to buy one.

A 41.5mm carb is not too big for a 330 if it has a little work done to it.  You will need a different rubber manifold for the reed when using any of the big carbs.  Some guys will heat up theirs and stretch it, but the wall thickness is not thick enough to get the  down stream contours right with the stock rubber manifold.

Even after machining the back of the carb you will still have to stretch the carb to air box boot a little where it fits onto the carb.

Title: How big of carb for a 330?
Post by: pantera1975 on June 26, 2014, 10:21:45 PM

I ride on private land which is all out full throttleand we have alot of ATV routs that are 35 mph on the roads. Pretty much everything besides
 dunes Where can I get a 41.5?

Title: How big of carb for a 330?
Post by: PORTED R on June 26, 2014, 10:31:24 PM

U can get one at Esr

Title: How big of carb for a 330?
Post by: pantera1975 on June 26, 2014, 11:00:24 PM

Quote from: PORTED R;37699

U can get one at Esr

They seem to have the best price. Is the out side on a 41.5 all the same measurements as a 39? I got a machined 38 from ESR and a non machined one from another place. It fits fine.

Title: How big of carb for a 330?
Post by: kb250r on June 26, 2014, 11:11:56 PM

I think LED has them,he did the boring on my 39mm not sure on cheapest pricing...but his customer service and tech help is 2nd to none....

Title: How big of carb for a 330?
Post by: PORTED R on June 26, 2014, 11:13:06 PM

Outside is the same
It starts out as a 39pwk
Then the inside gets cnc machined or milled depending on tooling and equipment used

Title: How big of carb for a 330?
Post by: Jerry Hall on June 27, 2014, 02:00:38 AM

Quote from: pantera1975;37698

I ride on private land which is all out full throttleand we have alot of ATV routs that are 35 mph on the roads. Pretty much everything besides
 dunes Where can I get a 41.5?

We have 41.5 TM Mikunis and 41.5 Keihins.  Call us so that we can discuss which one will be best for your application.

Title: How big of carb for a 330?
Post by: pantera1975 on June 27, 2014, 07:36:03 AM

Jerry will you text me your number 920-410-4375. Thanks

Title: How big of carb for a 330?
Post by: Bio86 on June 27, 2014, 08:37:56 AM

I've used as big as 44mm lectron on a 301 and still seemed fine, if you mash the throttle from real low rpm it'll hiccup a bit but that's it.  Used Ftz's 39/41.5 Mikuni for a long time on a 310 and 330 and had no issues at all.

Title: How big of carb for a 330?
Post by: Tbone07 on June 27, 2014, 09:03:10 AM

You can definitely use a 41.5.

Just remember:

bigger carb = more top-end, less bottom-end throttle response/power
smaller carb = less top-end, more bottom-end throttle response/power

The type of riding you do dictates what size carb you need to run