Dual 46 Buckshots...good setup?

[nightrider05]

I realize this has probably been asked before, but a quick search didn't reveal what I was looking for. This will be in my 97 Superjet with 62t/61x motor.

I have a pump gas ported set of Riva 61x cylinders. The mods will be as follows:

OEM lightened flywheel
Girdled head 175 PSI
Pump gas ported cylinders
MSD enhancer
Factory B Pipe
aftermarket reeds

I have a 62t Riva intake manifold and a set of 46 Buckshots sitting here...would these carbs be good for freestyle at all? I have been considering buying a single carb intake manifold and running this 48 I have sitting around...

However I just have these carbs laying around..if they could be good for my setup then I may just use them since it wont cost me anything. If they won't be good for what I want, then I will just sell the entire setup and buy the other manifold.

Thanks for any input.

 

[SUPERTUNE]

Good race carbs! Not so good for freestyle/freeride. Don't waste your time with them especially with low compression engine.
At 200+ lbs then it might be worth a shot with some intake manifold filling to speed up the air flow to get them to respond off the bottom and stay clean with the jetting.
Even though I don't prefer single carbs setups your better off with a single instead of these Buckshot carbs. Save up and buy a new Mikuni 46mm carb to start, then when you save more you can get another 46mm and then you have what you need as a dual setup, this will last you lots of engine upgrades and even will support a pump gas 1000cc engine really well.

 

[nightrider05]

Great information. Thanks!

 

[MNTURBO]

I had a Sj with them with a dry pipe, reeds and a head- it hit HARD but couldn't idle for long periods without fouling the plugs .... Skip

 

[nightrider05]

That is interesting as well...

I may just throw them on and try them out. It may be a while before I get the manifold & carb setup im wanting anyways.

 

[jetski9010]

That is interesting as well...

I may just throw them on and try them out. It may be a while before I get the manifold & carb setup im wanting anyways.

I think someone was just saying Art at jetworks can use these carbs and turn them into blackjacks. That would be a cost effective way to go and then you dont waste these carbs.

 

[SUPERJET-113]

I think someone was just saying Art at jetworks can use these carbs and turn them into blackjacks. That would be a cost effective way to go and then you dont waste these carbs.

Yes, this is true!! Art told me this on the phone last year and i posted about it. He can take a "dribbling" Buckshot carb and turn it into a Brapjack carb. :Banane09:

 

[motosicko]

I realize this has probably been asked before, but a quick search didn't reveal what I was looking for. This will be in my 97 Superjet with 62t/61x motor.

I have a pump gas ported set of Riva 61x cylinders. The mods will be as follows:

OEM lightened flywheel
Girdled head 175 PSI
Pump gas ported cylinders
MSD enhancer
Factory B Pipe
aftermarket reeds

I have a 62t Riva intake manifold and a set of 46 Buckshots sitting here...would these carbs be good for freestyle at all? I have been considering buying a single carb intake manifold and running this 48 I have sitting around...

However I just have these carbs laying around..if they could be good for my setup then I may just use them since it wont cost me anything. If they won't be good for what I want, then I will just sell the entire setup and buy the other manifold.

Thanks for any input.

I'm running Buckshots on my 98 with a very similar setup as you have, except for my Factory Drypipe. I am not sure if they are 44's or 46's. Ski runs very strong, although I'm no expert freestyler, pretty much a novice wanna be, only issue I have with them is a rich low speed condition. Cleans out and rips mid and top. I think with a little toying around with different pop off springs and jets I can get the low speed better. Sounds like turning these carbs into Blackjacks might be a good option.

 

[nightrider05]

Anybody know what Art charges to do that?


And also, What is the technical difference between Buckshots and Blackjacks??

 

[Waternut]

You should read more on blackjacks to get a full understanding but basically they don't have anything protruding into the airflow. There are tiny holes around the circumference of the carb that deliver the fuel. If you have a carb that works well on your motor, Art will rejet the carbs as part of the work so they flow the same as before so you shouldn't have to rejet and spend all day/week trying to get it tuned again.

I asked Art a few months ago and a 44mm carb is $170 each and bigger carbs are a little more. Turn around time was about 2 weeks.

 

[chips]

that seems kinda pricey? is it worth it??

 

[Matt_E]

that seems kinda pricey? is it worth it??

Absolutely. Best performing, easiest to tune carbs I've ever owned. Clean metering from bottom to top, seamless.
They can idle all day long and not load up.

 

[chips]

hmm ive got a set of them, maybe ill give him a call.

 

[Waternut]

From what I understand, you can convert most mikuni based carbs. I want to send my 44mm carb in over the winter but I'm hesitant because it runs so well. After I trashed my engine, I knew roughly the right settings and it still took me a while to find that sweet spot again.

 

[Matt_E]

A well tuned standard carb will run better than a crappily tuned "special" carb.
Going from well-tuned Full Specs to well-tuned BlackJacks won't make a world of difference.
If you got a good setup that's dialed, I'd stick with it.

 

[jetski9010]

that seems kinda pricey? is it worth it??

You think $170 a carb is pricey? I was glad to hear a price like this after going after a full spec setup for $1500+

 

[kevbo]

Why does everyone assume that a "specially modified" or bigger carb is always better than a standard SBN 44 or 46.

 

[Waternut]

Why does everyone assume that a "specially modified" or bigger carb is always better than a standard SBN 44 or 46.

I think the blackjacks are better because I've only heard very good reviews from the people who sent their own carb in. The bad reviews have come from people who have bought from someone else and can't tune it.

 

[Seb62T]

Most people are wrong. Thinking that bigger carbs will always run better thant OEM is wrong.
It depends on what you want to get.
If you are searching for linear and low end response, the OEM carbs are a great deal.
Increasing carbs size wil add mid and high speed range, and will alse be more ON/OFF (not linear). Bigger carbs also work great in low end, but they need : fine tunins, perfect shape butterflies, perfect sync. All these conditions are not often together and make bigger carbs giving you non linear power.
Many people fell like linear is less power as the power delivery very smooth compared to a bad jetted ski tha will give you a severe hit at the opening whatever you open 1/4 or full throttle...

Get in mind that carb synch is essential on bigger carbs if you wanna get some low end answer.

I have drilled my NOVI after the butterflies to synchronize them with a vaccum meter.
Any little gap between the carbs will be OK on 38's, but on 48's, as the surface is far larger and the air that get in the intake will increase dramaticly and unbalance your carburation.

Few FR/FS engines need bigger carbs. If you are racing, 44's will add a good gain at mid range over 38's.
48's are for superstock or PV's. No use on OEM engines with B pipe (except in single carb setup). But I don't like so much single setups.

I have had some 44's buckshots, that was a real pain to set up (coffmans dry echaust, ported cylinder, 185PSI...).
As it was said previously, buckshots have very low signal, that needs to be balanced by a low popoff...

However, I saw some nice running single 46 buckshot !

 

[jetski9010]

Most people are wrong. Thinking that bigger carbs will always run better thant OEM is wrong.
It depends on what you want to get.
If you are searching for linear and low end response, the OEM carbs are a great deal.
Increasing carbs size wil add mid and high speed range, and will alse be more ON/OFF (not linear). Bigger carbs also work great in low end, but they need : fine tunins, perfect shape butterflies, perfect sync. All these conditions are not often together and make bigger carbs giving you non linear power.
Many people fell like linear is less power as the power delivery very smooth compared to a bad jetted ski tha will give you a severe hit at the opening whatever you open 1/4 or full throttle...

Get in mind that carb synch is essential on bigger carbs if you wanna get some low end answer.

I have drilled my NOVI after the butterflies to synchronize them with a vaccum meter.
Any little gap between the carbs will be OK on 38's, but on 48's, as the surface is far larger and the air that get in the intake will increase dramaticly and unbalance your carburation.

Few FR/FS engines need bigger carbs. If you are racing, 44's will add a good gain at mid range over 38's.
48's are for superstock or PV's. No use on OEM engines with B pipe (except in single carb setup). But I don't like so much single setups.

I have had some 44's buckshots, that was a real pain to set up (coffmans dry echaust, ported cylinder, 185PSI...).
As it was said previously, buckshots have very low signal, that needs to be balanced by a low popoff...

However, I saw some nice running single 46 buckshot !

I dont know about the OEM carbs being the best for low end. When I was first talking to Art about carb setup he was telling me how the oem 44's were more tuned for a high end sitdown then a freestyle motor.