SXR stock carbs and intake

Clean set of stock mikuni carbs comes with intake manifold and a box of 5 spare carbs for parts.I pulled these off my 2010 sxr for another setup and they work fine as they are,PM if interested
 
I'm not sure if WFO is suggesting to buy one of those intakes on Ebay, but in case the OP isn't aware those are the much more commonly available/cheap intakes for Keihin carbs, they have a slightly different bolt pattern than the Mikuni carbs used on late sxi pro or SXR.

This is why the mikuni carb version of the intake is much more valuable. OP probably knows that which is why he posted this ad, but anyway FYI for anybody else out there who stumbles on this.
 

WFO Speedracer

A lifetime ban is like a lifetime warranty !
Location
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Actually they are the correct intakes Storbeck, those are for big pin 750 -SXR with SBN carbs, the way you tell the difference is simple 8mm bolt holes versus 6mm and the dowel pins, all of the SBN manifolds have dowel pins and spacers and run 4 gaskets, the Kehin intakes have no dowel pins or spacers and run two gaskets, you have to remove the dowel pins to run the Seadoo carbs on these intakes or drill the carbs to accept the pins , the Kehin intakes also have oil injection ports in the intakes, the big pin 750 SXR intakes do not have them and they are not drilled for them.

Here is a pic of the ones that I have, those are not SXR carbs on there they are off a Seadoo 657x motor and they have to be slightly modified to use on the SXR manifolds, SXR carbs are 40mm I body these are 38mm I body carbs , I am running Seadoo carbs because they are easily obtainable and I have a few sets laying around here, SXR carbs as you can see from this thread are not easily obtainable.
 

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I dunno, sure looks to me like the holes in the Ebay ads are slightly smaller 6mm holes in a slightly different position than 8mm holes in your intake. Look at the distance from the hole to the outside edge, and the distance from the bolt hole to the dowel hole. Your mikuni intake the hole is closer to the outside edge and further from the dowel. As a side note, I've always thought it looks like the Kawasaki casting was originally designed for the mikuni carbs because the holes in the "kehin" position intakes always look like they're somewhat out of position from the location the casting was designed for so it visually sticks out.

I can say that I know the keihin intakes use dowels too, and the dowels in the keihin intakes are shorter than the mikuni intakes because they don't have to go through the spacers, the ebay ads you posted look like the shorter dowels to me.

And they're listed for a couch, certainly possible that the ebay seller listed them wrong, but from the appearance, which admittedly is not super obvious going by eye, combined with the low probability that somebody listed the more rare and valuable intake as a plain vanilla one from a couch, I really think those are just couch intakes.




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I like the idea of using the sea doo carbs though.

I have a couch intake that I'm filling in the holes and re-drilling/tapping to fit mikunis because I wanted to try out filled in crossover tube and couldn't get myself to modify the sxr intake that I have. If that works a modified couch intake with sea doo carbs might be my go to setup.

Why on earth do they use those stupid spacers on the SXR?
 

WFO Speedracer

A lifetime ban is like a lifetime warranty !
Location
Alabama
It is really strange like they may be the same casting but drilled differently . kind of like the 550 SX reed valve heads are the same casting as the 550 PP heads. I will have to look at the dual carb intake on my small pin and do some measuring with the caliper , it's running Kehin carbs.
 
There are definitely big pin and small pin 750 intake manifolds for keihin carbs thst came with dowel pins installed.

There are multiple versions of big pin and small pin intake manifolds for keihin carbs and some use oil injection line ports while others do not.

All manifolds for keihin carbs are tapped for 6mmx1.00 thread pitch, and the spacing is different than the 8mmx1.25 thread pitch of the mikuni manifolds (which also incorporate different spacing between dowels and tapped holes)

I have mounted the Seadoo mikuni carbs to a mikuni style manifold. It worked well and the ski ran just fine with the Seadoo carbs. I have not tried filling in the holes on a keihin style manifold and retapping but it sounds simple enough, might use to try that.
 
Actually they are the correct intakes Storbeck, those are for big pin 750 -SXR with SBN carbs, the way you tell the difference is simple 8mm bolt holes versus 6mm and the dowel pins, all of the SBN manifolds have dowel pins and spacers and run 4 gaskets, the Kehin intakes have no dowel pins or spacers and run two gaskets, you have to remove the dowel pins to run the Seadoo carbs on these intakes or drill the carbs to accept the pins , the Kehin intakes also have oil injection ports in the intakes, the big pin 750 SXR intakes do not have them and they are not drilled for them.

Here is a pic of the ones that I have, those are not SXR carbs on there they are off a Seadoo 657x motor and they have to be slightly modified to use on the SXR manifolds, SXR carbs are 40mm I body these are 38mm I body carbs , I am running Seadoo carbs because they are easily obtainable and I have a few sets laying around here, SXR carbs as you can see from this thread are not easily obtainable.
Any info on how you modified the carbs? I actually have a set of mikunis laying around from a Sea Doo. I never thought to try them on a Kawi due to the carbs being mounted sideways with a throttle linkage.
 

WFO Speedracer

A lifetime ban is like a lifetime warranty !
Location
Alabama
if they are mounted sideways they will not work, you can't convert parallel carbs to work in line without changing the throttle shafts and you would have to have the appropriate linkages , the carbs I used are off of a 657 Seadoo GTX if they are not set up like the carbs below they will not work period. The carbs below will work if you take the brace bar off of them and do some magic tricks with the linkages between the carbs so they will meet up, the spacing between the SXR carbs is different than the spacing between the Seadoo carbs.

Everyone seems to think a seadoo carb Is a seadoo carb or an I body carb is an I body carb, that is totally incorrect, there were several different configurations of I body carbs and prior to 95 they used SBN 38's, not I body, most I body carbs were set up to run parallel with linkages, anything put on a seadoo past 1995 will not work, Yamaha carbs are set up to run parallel and they are held onto the intake with allen head bolts from the bottom , they won't work either.

 
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