SX/SXi/SXi Pro Total loss on a budget?

[Mofoxen]

2000 sxipro. Cases & cylinder ported, single sbn46 w/ v3reeds, factory limited pipe(going to try a wax sxr wet pipe soon). ADA head and dual 46's on the to-do list. I already have zeel installed, & love it but im wondering why not take the magnets out of my flywheel and get a little more performance out of her. What else is would i need to do to switch to total loss?

 

[Roseand]

Is your charging wheel already lightened? You're not gonna see massive gains just removing magnet weight. Most of the gain is in the programmability of the ignition. If you really wanna see some gains on that setup switch to dual carbs and/or bump your compression and run the necessary octane required.

 

[WFO Speedracer]

I rode Grapapes carbon fiber SXR in Orange beach a few years back , his ski had this mod done to it, on the late model SXI Pros and the SXR's those are DC CDI systems, you can remove the magnets and it does make a significant difference in performance , nothing else is needed to convert those to total loss , it simply no longer charges and you no no longer have the magnetic drag of the stator.

 

[Mofoxen]

Is your charging wheel already lightened? You're not gonna see massive gains just removing magnet weight. Most of the gain is in the programmability of the ignition. If you really wanna see some gains on that setup switch to dual carbs and/or bump your compression and run the necessary octane required.

Its a completely stock flywheel still. Ill buy a jetnetics this winter if the total loss switch over goes well.

 

[Mofoxen]

I rode Grapapes carbon fiber SXR in Orange beach a few years back , his ski had this mod done to it, on the late model SXI Pros and the SXR's those are DC CDI systems, you can remove the magnets and it does make a significant difference in performance , nothing else is needed to convert those to total loss , it simply no longer charges and you no no longer have the magnetic drag of the stator.

Thank you, i was worried i needed to modify the trigger also. Im gonna do it tomorrow i think. Just in time for the weekend!

 

[Roseand]

Thank you, i was worried i needed to modify the trigger also. Im gonna do it tomorrow i think. Just in time for the weekend!

Have it lightened further by @speedysprocket

 

[speedysprocket]

Taking the magnets out is like 13 ounces. I lighten an additional 11 ounces after that. And balance, which you’ll be missing for your project this weekend…
Definitely a worthwhile mod and dollar for dollar, better than the aluminum flywheel!

 

[beerdart]

You can also remove the stator leaving just the trigger.

 

[Mofoxen]

Have it lightened further by @speedysprocket

 

[Mofoxen]

You can also remove the stator leaving just the trigger.

What does the trigger use for timing once the magnets are gone?

 

[Mofoxen]

Taking the magnets out is like 13 ounces. I lighten an additional 11 ounces after that. And balance, which you’ll be missing for your project this weekend…
Definitely a worthwhile mod and dollar for dollar, better than the aluminum flywheel!

I agree. I think ive dealt with you on at least one flywheel in the past, alex k? If so Ill send you a msg later and see what we can work out, thanks for the reply

 

[speedysprocket]

What does the trigger use for timing once the magnets are gone?

750, 760, 800 all use the steel bumps on the outside of the flywheel for timing. The magnets are just for charging.

 

[WFO Speedracer]

I have a question because I don't know on this particular thing , are the 750 SXI pro and SXR flywheels different than the older 750 flywheels ?

I know the ignition systems are totally different but I have only worked on one SXR with ignition problems and it was a bad CDI box so I didn't get to peek at the flywheel.

 

[MTRHEAD]

Need an 04’+ cdi pretty sure or an aftermarket that uses a positive input from battery

2003 sxr cdi was same as 96-02 sxi technically and will not work as total loss nor will any pre04 twin cdi.

I’ve heard 92 and early 93 flywheels were unique in someway but 1996-2011 are all the same with respect to timing triggers

Tons of info on this if you do a search

 

[MTRHEAD]

I also have a Rad billet total loss flywheel for a Kawasaki twin that uses the oem pickup.

 

[WFO Speedracer]

The early 92-93 flywheels have an extra taper and will not fit onto the later model cranks, you can machine that taper off and then it will work on any 650-750 crankshaft.

My understanding is that the 04 and up SXR cdi is DC and runs directly off the battery like the 787 and 951 Seadoos. which is why all it needs is the trigger.

The aftermarket CDI's for the SXR are really cheap and seem to quite work well, making a budget total loss doable on these ski.

 

[waxhead]

Pull the charge magnets out of the flywheel and run a zeeltronic

 

[glenn240]

Taking the magnets out is like 13 ounces. I lighten an additional 11 ounces after that. And balance, which you’ll be missing for your project this weekend…
Definitely a worthwhile mod and dollar for dollar, better than the aluminum flywheel!

Yup- Alex lightened mine this way after I removed the magnets, and my ski is beyond snappy with the combo of the Zeel and light f/w. Do it!

 

[speedysprocket]

Some conflicting info.
Early small pin cranks had a larger shoulder and require an extra taper on the flywheel to clear it. That flywheel will fit the later engines all the way to 800s. The later flywheels will not fit those early cranks without cutting that extra taper into the flywheel (not cutting the crank).
Otherwise, the flywheels all have the same part number and work the same. There are cosmetic differences like 1 vs 3 holes in the face and the sizes of the rivets, but no effect on operation.

 

[Storbeck]

The early 92-93 flywheels have an extra taper and will not fit onto the later model cranks, you can machine that taper off and then it will work on any 650-750 crankshaft.

My understanding is that the 04 and up SXR cdi is DC and runs directly off the battery like the 787 and 951 Seadoos. which is why all it needs is the trigger.

The aftermarket CDI's for the SXR are really cheap and seem to quite work well, making a budget total loss doable on these ski.

I think you meant to say it right but as this is written it's backwards.

Old flywheels will fit on new cranks, newer flywheels won't fit in older 750 or 650 cranks.

It's a pretty easy mod to cut a taper on a newer flywheel to make it fit in an older 750 or a 650. Moot point since this is already a big pin motor. It's not a precision thing the taper that the flywheel actually fits in is common across all of them, just need to create since clearance. It could be crudely done with a die grinder.