ProSouth
Seriously, Don't be a dick.
- Location
- kawasakis suck
What did we learn mcdoggy style?
POLL: Best carbs for ported 701-760?
- Thread starter McDog
- Start date
waxhead
wannabe backflipper
- Location
- gold coast
Im suprised people are voting for the stock carbs
- Location
- Rentz, GA
I'm a huge fan of the true taper bored OEM 38's because that is what is on one of my skis but I have always been curious how well a pair of 46's would work as well.
It's the wife's ski so I am forbidden to find out.
It's the wife's ski so I am forbidden to find out.
waxhead
wannabe backflipper
- Location
- gold coast
She who must be obeyedI'm a huge fan of the true taper bored OEM 38's because that is what is on one of my skis but I have always been curious how well a pair of 46's would work as well.
It's the wife's ski so I am forbidden to find out.
- Location
- South Florida
Not a lot of votes for the singles.
No one likes being single.
I voted dual 46s because original Novi 46s always tuned easily for me with anything from a B-pipe to Speedwerx race to Factory Type 9.
Somewhat related question but I think maybe @waxhead would have some insight. My understanding is that the "oem" 44 carbs from the Yamaha 760 are less desirable than "aftermarket" sbn44's (from Mikuni) because of something to do with the progression holes creates a partial throttle lean spot that is trickier to tune around than the "aftermarket" 44's or 46's. If that is the case, are the 44's that come with a 1200 tripple the same as what comes on a 760? (and is the lean spot thing actually true?)
Seems like if a guy wants something bigger than stock 38's those Yamaha 44's are by far the cheapest option, but I've heard mixed info about if they're any good.
Seems like if a guy wants something bigger than stock 38's those Yamaha 44's are by far the cheapest option, but I've heard mixed info about if they're any good.
ProSouth
Seriously, Don't be a dick.
- Location
- kawasakis suck
This is what I have (oem 44’s) and having constant inconsistencies with the carbs. @McDog is trying to get me to try the oem 38’s , which I’m not knocking, but I bought a single 62t mani and I’m going with a new sbn46. Ive ran them before on previous motors with success, and the 38’s May hit harder or pull longer or be snappier, but I’ve run a single with success in the past... so I went that route. Oem 44s were not for my setup. That being said, I’ll have a complete dual 44 setup for sale sometime next week
Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
You will be fine with that 46. The OEM Dual 38's do work really well on smaller motors............. Larger Carbs do not always work. Keep in mind, A specific motor can only flow so much Air/Fuel Mixture. And the Results will vary.
ProSouth
Seriously, Don't be a dick.
- Location
- kawasakis suck
Long story short, I bought a gp760. Paul was going to bore it, port it, Jet it, and all that
Cylinder was cracked. Paul suggested ditching that cylinder and getting a 61x. So I did. It was a freshwater ski, so I didnt really think I was going to be running into these carb issues, but I am. So everybody that has any kind of knowledge all agree at least on one thing. Ditch the oem 44’s. A handful said run the 46, a handful said the 38’s. The reason I went with - single was because of personal experience and fuel economy since I plan to be making every surf trip I can with this ski. Hugo is about 4 hrs for me.
Cylinder was cracked. Paul suggested ditching that cylinder and getting a 61x. So I did. It was a freshwater ski, so I didnt really think I was going to be running into these carb issues, but I am. So everybody that has any kind of knowledge all agree at least on one thing. Ditch the oem 44’s. A handful said run the 46, a handful said the 38’s. The reason I went with - single was because of personal experience and fuel economy since I plan to be making every surf trip I can with this ski. Hugo is about 4 hrs for me.
bored&stroked
Urban redneck
- Location
- AZ
Why do I hear about fueling issues with 62t single carbs? Such as what big kahuna talked about on page 2. Its enough to never make me want a single carb 62t, and why I've kept my 61x cases so far.
Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
With a stock motor, single carb works fine........ When you go to a ported, it is flowing more fuel, flowing faster. Because of this, small changes in atmosphere can make a noticeable difference. This was just my experience. With Duel 38's. They handle these changes better. As far as mentioning single and running out of gas. This was on a ported setup. With duels when you start to run out of gas you would start to get 1 carb that would start dribbling, you will feel this letting you know. With single, if you are running above half throttle when it runs out. it runs out!!!!!!!!
Dual 38s are very fuel efficient even on ported motors.
- Location
- Houston/Galveston
Why isnt Holly double pumper on the list to choose from?
Theoretically all you would have to do it on equalize airflow differences between small and large carburetors would be to slightly restrict the air inlet of the large carburetors.
There's a group k article where they talk about using duct tape to do that and got a lot better signal.
Another thing. A larger set of carburetors without the air inlet restricted would also in theory burn less not more gas. This is due to the Bernoulli effect, larger carb slows the air flow. The strength of the air flow signal will be substantially less. This is mentioned in mikuni manual, says something on the lines of "engine is lean at wide open and doesn't respond to jetting changes, cause: carburetor too large for engine."
Again in theory a resticted air inlet should mostly solve the issue.
My personal experience backs up those claims, however my novis are old and could have had other issues at play.
Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
But why spend the extra money for larger carbs just to restrict them!!!!!!
CD155MX
Squirrel!!!
- Location
- Alta Loma, CA
But why are you yelling?
Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
ProSouth
Seriously, Don't be a dick.
- Location
- kawasakis suck
You gone listen to the man