SX/SXi/SXi Pro Big pin, little pin 750 sxi questions

tor*p*do

tor*p*do

Squarenose FTW
Site Supporter
Location
NW NC
Kawasaki 750 standup History

1992 750sx 20 mm rods Keihin (1) 140 mm pump
1993 750sx 20 mm rods Keihin (1) 140 mm pump
1994 750sx 20 mm rods Keihin (1) 140 mm pump
1995 750sxi 22 mm rods grey Keihin (2) 140 mm pump
1996 750sxi 22 mm rods purple Mikuni (2) 140 mm pump
1998 750sxi pro, new hull Mikuni (2) 140 mm pump
1999 Mikuni (2) 140 mm pump
2000 Mikuni (2) 140 mm pump
2001 Mikuni (2) 140 mm pump
2002 Mikuni (2) 140 mm pump
2003 SXR 800 Mikuni (2) 140 mm pump
2004 Mikuni (2) 140 mm pump
2005 Mikuni (2) 140 mm pump
2006 Mikuni (2) 140 mm pump
 
john zigler

john zigler

Vendor Account
Location
wisconsin
stiil though, what about the early 93, 94 SS XI sit down motors? these could feasably end up in a stand up. the 93 was a dual carb, with 12 bolt intake, and from what i can tell by crank part number is a small pin.
 
tor*p*do

tor*p*do

Squarenose FTW
Site Supporter
Location
NW NC
when you are talking about 10 - 12 year old boats,
sometimes what is in there is a mix of 750 parts from different years:scratchchin:

those old couch motors work fine in 750 standups
just like pulling a 701 from a VRX Pro for you SJ!
 
john zigler

john zigler

Vendor Account
Location
wisconsin
tor*p*do said:
when you are talking about 10 - 12 year old boats,
sometimes what is in there is a mix of 750 parts from different years:scratchchin:

those old couch motors work fine in 750 standups
just like pulling a 701 from a VRX Pro for you SJ!
Click to expand...



yes, i know that.

i don't think you get what i am saying.

starting in 1993, kawasaki offered a dual carb 750 motor in the SSXi 2-seater couch. this was a "small pin" 750 mtor, with dual carbs, AND a 12 bolt intake mount.

SO, like you said yourself, over 15 years time, it's hard to say how many motors have been switched around.

i am just answering jfw's question of "is this definate?" and IMO NO! it is not.

zig
 
C

Coreyf983

Location
Minneapolis, MN
forgive me if I missed it then, but if I have both 750sx electrics, and 750sxipro electrics, which is the better to use for a small pin engine?
edit: and by "better" I mean what are the pros/cons of each.
 
Crab

Crab

thanks darin...noswad!
Location
Seattle
Coreyf983 said:
forgive me if I missed it then, but if I have both 750sx electrics, and 750sxipro electrics, which is the better to use for a small pin engine?
edit: and by "better" I mean what are the pros/cons of each.
Click to expand...
650 electrics, simple but some machining may be required, coils getting a little more scarce. Only 2 options in spark curve with charging systems, stock and Dales without any retard.

750, digital with lots of a/m options for curves etc., however stators seem to be the weak link and they run heavy stock flywheels. More flexability.
 
scott07

scott07

Swampy Bottom Boyz
Location
Lake of the Ozarks, MO
Ive seen a few places that say the stator timming is different between big and small pins..... but isnt the timming built into the cover that everything mounts to? The trigger and stator are both mounted to the cover which would determine the timming correct? This is what timming advance kits do.... it simply moves the mounting position on the trigger a few degrees
If im wrong are you all saying a small pin stator wont work on a big pin at all? or just not as well?

Also do all big pins have the same port timming or did sxi pro cylinders have lower port timing?
 
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Lowmax55

Location
Austin, tx
I just built a engine for my x2. I used a small pin crank and a big pin head! It runs but like crap! I trying to figure if it's the big pin small pin cylinder that's the problem. Or if it just my :):):):) stock one carburetor and tge stock pipe. I also notified tge electric. 750 cc engine with a 650 flywheel and stater. Could that be my problem? If anyone can help me out I sure would appreciate it!
 
djkorn1

djkorn1

kidkornfilms
Site Supporter
Location
Cleveland Ohio
Dude, you got a mess there....yes the stock pipe will suck...yes, you probably will need to ditch that head because your compression might be super low (check it). Yes the single carb will be a dog...you also might need to do some tuning...

BTW..to add to this OLD discussion.............I am currently running my SXR with 750 big pin cases with no problems. If anyone has a big pin 750 and blows their cylinder, I CANT IMAGINE WHY you wouldn't get an SXR cylinder and head to replace it.
 
N

nateski

Location
new zealand
Hey there, to also add to this old discussion ( Hopefully you guys are still around! :D) , Ive got a big pin crank, crank case and dual keihins that I got cheap to hopefully replace the seized crank in my small pin 750sx.

Couple of questions...

Will the motor run ok with the big pin crank/crankcase and twin carbs even though it has the small pin cylinders and head installed?

If it is not recommended, would fitting the big pin crank into the small pin crank case be an option?

Thanks
 
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