POLL: Best carbs for ported 701-760?

What are best all around carbs for a ported 701-760?

  • OEM 38's

    Votes: 20 37.7%
  • 44's

    Votes: 9 17.0%
  • 46's

    Votes: 17 32.1%
  • single 44

    Votes: 0 0.0%
  • single 46

    Votes: 4 7.5%
  • single 48

    Votes: 3 5.7%

  • Total voters
    53
Vortex, your logic skills are immensely challenged.

First, this is about carb choice. Then what validates the input. Opinions don't matter on this, experience and out come do.
I get, you made a post, it was challenged, your little snowflake feelings were hurt, then it turns into a vomit fight.

How does finding one case which has absolutely nothing to do with you, other than being the listening post for one venting guy. Did he tell you how much he loved his other motor and how much time he got out of it. It has nothing to do with this thread or with you.
But yet you post a negative to get in a cheap shot. I guess I hurt you?

I was going to tell you that even still if you wanted you could come to a Dobifest and we could discuss how it all works, I even have a carb cut in half which I use explain how it works when customers drop by, and maybe you'd learn a little and be able to really help someone else, that's what this forum was supposed to be about.

But Noooo, you had to take a cheap shot at P&P.

Well, since your a "racer" I will be at some races maybe even I might be tech ,and maybe run into you. We can then have a recorded debate and I'll show how much you know in front of everyone.
I know you wont, you hide behind "Vortex." What class do you race? Stock? Seeing how you test and do stuff to your boat I'm sure your not that fast unless someone else does it for you.
Phil charges what it worth to do it right, actually not as much as he puts into it.

And for the record, at the WF in havasu, you should have seen how many of the top pro's came to Phil for help.

How many come to Vortex? (Name withheld because afraid)
 
Last edited:
So best carbs. 38's if no choice and your happy with the power of that.
760 44's, if your a good tuner, or have access to one, ok.
Mikuni 44's much better than 38's.
46's a great value.
48's / 49's work great on a 701 spec racer, surf depends on how big engine is.
Single's ---- will only make x hp so taking an engine that can make 130hp, you won't with a single. But it can and I've tried it,
work really well in surf but on flat it shows its weakness.
 
One of the biggest problems people face on such forums is anonymity. On many forums people claim facts, knowlege, expertise without having to back it up. They hide behind an imaginary persona. Why?

You didn't mix up one detail and word it backwards, you don't understand it that well. That's the truth.

I'll make it easy to understand. If this was MMA it would be easy, shut up get in the ring and put it to the test. NO HIDING.

I do know and have met most of the people in Jetskiing who have designed, developed, and proved in competition what works, how and why. So yes, personal info is who you are and what you know!

Things are changing for me and so now I will and get to call it out. My personal hero's in this sport, the Tim's, (Tynin, Judge) Hero, Bun, XS, ,,, Phil and Paul along with many more. When Phil Clemmons tells me a result I ask questions, I don't question his judgment because who he is and what he's done.

I've seen people argue with Tim Tynin about pipes and the guys arguing don't even know how a pipe works other than the very, very basic theory (really, they've never built a pipe) .
I have had conversations with some guys that developed GP 500 two stroke engines (If you don't know about the 500's then you don't understand the level of two strokes). I asked questions and gave my personal results and listened to the answers as to why I got what I got.
I don't want to be the "know it all" guy and there are a few smart
Vortex, your logic skills are immensely challenged.

First, this is about carb choice. Then what validates the input. Opinions don't matter on this, experience and out come do.
I get, you made a post, it was challenged, your little snowflake feelings were hurt, then it turns into a vomit fight.

How does finding one case which has absolutely nothing to do with you, other than being the listening post for one venting guy. Did he tell you how much he loved his other motor and how much time he got out of it. It has nothing to do with this thread or with you.
But yet you post a negative to get in a cheap shot. I guess I hurt you?

I was going to tell you that even still if you wanted you could come to a Dobifest and we could discuss how it all works, I even have a carb cut in half which I use explain how it works when customers drop by, and maybe you'd learn a little and be able to really help someone else, that's what this forum was supposed to be about.

But Noooo, you had to take a cheap shot at P&P.

Well, since your a "racer" I will be at some races maybe even I might be tech ,and maybe run into you. We can then have a recorded debate and I'll show how much you know in front of everyone.
I know you wont, you hide behind "Vortex." What class do you race? Stock? Seeing how you test and do stuff to your boat I'm sure your not that fast unless someone else does it for you.
Phil charges what it worth to do it right, actually not as much as he puts into it.

And for the record, at the WF in havasu, you should have seen how many of the top pro's came to Phil for help.

How many come to Vortex? How dare you take a shot at him!

Wow man I'm sorry you got so flustered I meant nothing against p&p, you get what you pay for.

You were disrespectful from the first post you made, and I have been civil with you. Chill out.
 
Flustered? LOL
So here is what works carb wise, at least the most straight forward way. The few, and I mean very few good tuners can do really well with some things
but you still need a good basis to get good results

Each one of these I have experience with over the last 27 yrs.

So best carbs. 38's if no choice and your happy with the power of that.

760 44's, if your a good tuner, or have access to one, ok.

Mikuni 44's much better than 38's
.
46's a great value.

48's / 49's work great on a 701 spec racer, surf depends on how big engine is.

Single's ---- will only make x hp so taking an engine that can make 130hp, you won't with a single. But it can and I've tried it,
work really well in surf but on flat it shows its weakness.

Vortex, what do you think? Your a pro racer / tuner!
 

waxhead

wannabe backflipper
Location
gold coast
Flustered? LOL
So here is what works carb wise, at least the most straight forward way. The few, and I mean very few good tuners can do really well with some things
but you still need a good basis to get good results

Each one of these I have experience with over the last 27 yrs.

So best carbs. 38's if no choice and your happy with the power of that.

760 44's, if your a good tuner, or have access to one, ok.

Mikuni 44's much better than 38's
.
46's a great value.

48's / 49's work great on a 701 spec racer, surf depends on how big engine is.

Single's ---- will only make x hp so taking an engine that can make 130hp, you won't with a single. But it can and I've tried it,
work really well in surf but on flat it shows its weakness.
Pretty much spot on there buddy. But then again you and I have tried stuff and actually tested to get our data
 

waxhead

wannabe backflipper
Location
gold coast
I hate to interrupt the shouting match for tech info, but what is it about the 760 44's that get them the 'if you're a good tuner' comment?
They need to be heavily reverse jetted in my experience to get the low speed punch out of them, but then they are as good as any 44. You can set them up conventional style but they feel a little weaker in the mid then. But in reality who doesn't want to reverse jet their ski it makes so much more torque
 
I think you're over reacting, that's fine it happens. All those harsh call outs and what not, really uncalled for and makes us all look bad, I'm just lost as to how this went to poop so fast. Cheers


Flustered? LOL
So here is what works carb wise, at least the most straight forward way. The few, and I mean very few good tuners can do really well with some things
but you still need a good basis to get good results

Each one of these I have experience with over the last 27 yrs.

So best carbs. 38's if no choice and your happy with the power of that.

760 44's, if your a good tuner, or have access to one, ok.

Mikuni 44's much better than 38's
.
46's a great value.

48's / 49's work great on a 701 spec racer, surf depends on how big engine is.

Single's ---- will only make x hp so taking an engine that can make 130hp, you won't with a single. But it can and I've tried it,
work really well in surf but on flat it shows its weakness.

Vortex, what do you think? Your a pro racer / tuner!
 

waxhead

wannabe backflipper
Location
gold coast
I think you are missing the point, if the air inlet didn't matter everything would use the same air intake. No it's not gonna tune your motor for you and do some magic. Sheesh.

Many riders use the stock aircleaner for several reasons, that would be considered more restrictive than open elements. Or using a 1.5" filter instead of 3". Not talking about drastically restricting air flow.

The point is changing the air filter does change how it runs. If it didn't, then why does the mikuni manual recommend changing pop off springs when you go to open elements?
Ok i will bite, I wasnt sure if you were just acting or you in reality could not figure it out.
If you put a restrictive air filer on there you create a lower pressure inside your carb. this will increase the pressure difference across the jets and make your ski go rich.
People run stock aircleaners to keep the water out of their carbs no other reason. Mikuni tell you to drop the pop off because the older air cleaners were quite restrictive from the factory and they knew that if you reduce the restriction the pressure drop across your jets would reduce and thus the jets would flow less
 
So by reducing or adding restriction you are changing the flow to the Jets, is that not what I have been hinting at all along? No proper air cleaner is going to make your ski so restricted that it would hurt your motor, I assume that is what the big wigs are calling me out on? They interpretted that as A restriction so great that it actually chokes the motor from proper air flow? That's not what I meant at all
 
If you look in the body of a 760 44 you will see three weep holes. The size and position was developed by Yamaha for emissions, not performance. This transition area can/does cause lean spots in the fuel delivery. So if your not a good tuner you will pull your hair out trying to figure out how to get them to work because they look just like regular Mikuni carbs. Mikuni made several different 44's for several companies (and I hate when a customer brings a set over only to realize that he got took) So a good tuner can feel the weakness in the circuits and compensate till it works. Now imagine your trying to get this set to work cause you got it at such a great price and the guy who sold it said they work great. Its just not worth the effort.
 

McDog

Other Administrator
Staff member
Location
South Florida
My original post was for weekend warriors just trying to set up a easy to set and forget package. At the sub 760cc size, it seems most builders can tell you EXACTLY how to run 38's, but anything else gets tricky. By "best" in this case I meant easy to setup and runs well right out of the box without any tuning needed, as most of us can't tune a carb to save our life. It seems doubtful that most rec riders would notice any real power difference on a 727 with stock electrics and a bpipe between 38's and 44's or an aftermarket single.
 

DAG

Yes, my balls tickled from that landing
Location
Charlotte, NC
What a chit show, it's just a 701 people, you can't blow the damn thing up running 50/50 water. The topic is 100% opinion. Some opinions are based on what you think , heard, or read from others and some are from first hand experimenting. This isent a white paper. It would be nice if the people that didn't know wtf they were talking about wouldn't give advise but they don't know it's not bad advise as they got the info second hand. They just want to try and help out, I really doubt anyone is giving advise in hopes prosouths has a poop running Jetski.

It shouldn't have to be said but It's on the advise taker to do due diligence on the advise they go with. Not all options are weighted equal

You don't know what you don't know
 
McDog,
Whatcha got and why? Concerned with ease of tuning, total performance, and price.
Yea, it seems like a straight forward question. LOL
But it isn't that easy of a question and McDog you've been around for awhile so you should of seen how this
was going to go, like it usually does. If we were all standing around in a group then it would be easy but its
the age of the keyboard.
It was proposed to me that there be a rating system for members based on what they do, not number of posts.
I now think it should happen.
Oh, and awhile back I opened up a set of 38's , not like what you think, and they worked awesome!
 

ProSouth

Seriously, Don't be a dick.
Location
kawasakis suck
@egbrig the topic started with my setup and he recommended going to 38’s which I wasn’t against. I just went single 46 for ease of tuning and fuel economy. I can usually play with carbs and get them to run “ok”. As in it doesn’t stumble or act stupid. But there’s a difference between running good and being spot on, running correctly and pulling hard. I usuall don’t get too involved in the fine tuning part as I really am not, a tuner. And I don’t tell anybody I am either.
These 760 44’s just don’t give me consistent conditions to even try. But I haven’t done reverse jetting in them. I really feel like I’ll be putting this motor on the shelf anyways for a back up. hopefully this winter to go tpe, which in turn will be right back to duals and not so great fuel mileage. But I want a bigger motor since we do live by the lake and my v2x is pretty heavy.
 
Here's a funny, one of my customers put on a single carb, 48 or 9 can't remember. I rode it and it works great for surf. He was kinda scared to tell me he did it but I think it works great and meets his needs, but on flat water the single carb weakness will come through.
When I first got into racing (1989), the guy I learned from did things this way (BTW, I'm talking pro Mod and Pro superstock), what works the best, what works the most reliable. Some stock parts when modded work better than much of the aftermarket. I don't believe in exotic if you don't have the budget.
I feel like that crazy guy who keeps on screaming at the lemmings, "don't follow those guys off the cliff".
 
McDog,
Whatcha got and why? Concerned with ease of tuning, total performance, and price.
Yea, it seems like a straight forward question. LOL
But it isn't that easy of a question and McDog you've been around for awhile so you should of seen how this
was going to go, like it usually does. If we were all standing around in a group then it would be easy but its
the age of the keyboard.
It was proposed to me that there be a rating system for members based on what they do, not number of posts.
I now think it should happen.
Oh, and awhile back I opened up a set of 38's , not like what you think, and they worked awesome!

At what point in this little fit that went down did I (or anyone else really) offer truly bad advice to anyone? I said I had tried 48s and 38s on a engine similar to original post parameters. I then said I tried using different air filters as something to play with as part of your fine tune. What is so bad about what I said?

Honestly I think you owe me an apology. Yeah I joked about the cost to have your poop tuned but the service industry in general is expensive trust me I know I work in it.
 
Last edited:

ProSouth

Seriously, Don't be a dick.
Location
kawasakis suck
Here's a funny, one of my customers put on a single carb, 48 or 9 can't remember. I rode it and it works great for surf. He was kinda scared to tell me he did it but I think it works great and meets his needs, but on flat water the single carb weakness will come through.
When I first got into racing (1989), the guy I learned from did things this way (BTW, I'm talking pro Mod and Pro superstock), what works the best, what works the most reliable. Some stock parts when modded work better than much of the aftermarket. I don't believe in exotic if you don't have the budget.
I feel like that crazy guy who keeps on screaming at the lemmings, "don't follow those guys off the cliff".
I built the ski I did, for a well rounded do everything ski. I don’t have flatwater ski money. So I wanted a ski I could ride on the lake and have fun/ chase boats and take to the surf. I think the 964 with Dual 48’s/49’s, msd, high compression, lightened flywheel and all the fancy tricks will be way too much for surf. I’m honestly thinking I’ll go 46’s with a stock ignition (pump is a 148 torrent). And I believe it will be a smooth usable power with the heavier flywheel and tamable in the surf. After riding @Pablo again yesterday. I’m almost positive I’m going to try and get one built in the off season
 
Vortex---An Apology? When a guy take his f350 in for service and they give him a bill for $100/hr. people just accept it. These little toys are still machines that take time and experience to be good at. After many years of building in the high end of performance on this stuff (long before TPE) I know what it takes to do it well and do it right and I don't need to copy, steal others stuff and call it my own. I see it at every ride/race. People don't spend the money (some of us don't have it, some are just cheap) and they get some guy who "knows jetskis" and then wonder why their stuff always breaks or just isn't as good as another s who did it right.

You want to step up get in the ring and give your opinion, then you'd better know your stuff and be able to back it up. You took a bitch punch at me and at Phil because you don't have real, technical info to pass on and yet like so many you want to be "the man" and this board has so many of those guys. I truly want to help and when I go to events I usually wind up helping strangers instead of doing my own thing and I am not the guy who backs down, I have my nose broke too many times to prove it and am still not scared to break it again (in the physical sense and metaphorical).
On this, if you still want to talk tech if we ever meet then we could shake hands and have a conversation about how all this stuff works.
 
Top Bottom