The Z400 (LTZ400) G force extended hubs are a great way to widen the rear axle and to go 4 x 110 "Honda Pattern" rims, I'm a Big boy and they hold up quite well, just make sure you get them with the steel splines not the aluminum splines, and tapered washers.




 

Yea, the yamaha 4x115 fits 24 spline. (Banshee, YFZ, 660 raptor)  I think the 700 raptor has a different spline.

Since we're on the subject of hubs, bolt patterns, and axle width, here's a few things worth mentioning to the noobs...

Alternatives for the 26 spline axles are LTR450 stock hubs.
They'll add an inch or two on each side and they're made of steel all the way through.
A bit heavier than Gforce hubs but probably cheaper and definitely tougher.
Most newer quads have 26 spline axles, so there's plenty of options to get the bolt pattern you want.

Your options for the 24 spline hubs are just about as plentiful, thanks to the massive amounts of aftermarket parts for banshees.
Banshees use the 24 spline hubs, so you'll find hubs that fit the older 250's in pretty much any bolt pattern you want.

That's for the LT250 and LT500...but there's some other stuff that interchanges with older LT's, namely the LT230.
The 230 has a narrower 24 spline rear axle, but they interchange with the LT250's.
So if you have a 230 and want a wider axle, consider sourcing a stock 250 axle to replace it.
You'll get a wider track without using extended hubs (the 230's axle is a bit weaker, so I'd be hesitant to use extended hubs).
The other advantage is that you still have the ability to tack on an extended hub to the stock 250 axle to get even more width, since the 250's axle is built beefier.
Taking it the other way around, if you wanted to build a budget drag bike, using a 230 axle would be a good idea to narrow your 250's axle down without buying a custom axle.

Unfortunately, the 250's and 500's axles will not interchange without a custom built swingarm due to the axle bearings being slightly different.
I'm having a hard time remembering offhand, but I don't believe the sprockets and disk interchange either...due to their respective hubs not matching up as well.

Widening and changing bolt patterns on the rear is easy and cheap with extended hubs, but the hard part is getting the fronts to match your bolt pattern.
It's not a bolt on task, and it requires some machining or a new front suspension that utilizes the bolt pattern you're looking for.
Another consideration is that a wider track on the rear (compared to the front) makes steering more difficult and further biases the steering to track straight with the rear tires.
If you don't want your quad to have excessive understeer, make sure you widen the front and keep it just a tad bit wider than the rear.
You'll see the same exact thing in nearly every vehicle on the road today for that exact purpose.

Mitch, feel free to move this post to another thread if you think it's straying too far from the original topic, or let me know and I'll start a new thread about it?
One of these days we'll get everything back in writing so we can search for this info, rather than trying to remember it all LOL
Hopefully this time around we can keep it easy to access without a ton of other threads to sift through...