Ok, out of my ever looming curiousnesses.
I am contemplating an LTR axle swap to the Z.
Trying to figure out if there is a such bearing to do the swap is my first goal.

So, I need the measurement of the stock LTR axle where the bearings ride.
If anybody has the info please fill me in

go to bossbearing.com and they might be able to help you out

well, I have access to plenty of bearings. I just need to know the ID of the ltr bearings.
I'm also looking for info on the trx450R axle bearings, if anyone knows the numbers, or could get me the numbers off of the bearings so I can cross them.

After some note comparing.
The Z was around the 46.5 mark stock.. i think.

And the LTR was 50" dead on.. so it's almost a +4 setup..
Just gotta figure out bearings and how to get the front wide enough...

Come to think of it.
Does anybody remember what it was about the LTR arms that wouldn't work.
I figure it'd be almost like the 450R to 400EX arm swap, just tweak them in a half inch or so to bolt up.
For TT I wouldn't be so worried about the high techness of having bearing scrub under full travel..
It's basically a mach up setup to get an idea..
But if it worked out fine then I'd run it.

I've done the R to EX arm swap already in the past. Not much to it. Just tweak in a little, then back out enough that the needle bearing lines up straight.
Where's the post where one of the older members tried it?

No info huh?
I might have to toast a set of 450R bearings to find out if it's possible.

the ltr arms wont fit unless you cut off one the rear lower mount and move it back on the frame. there was a post on here but the mods considered it dangerous because he couldn't provide caster or camber measurements, not to mention he was a douche.
If you consider it then mock it up first and see what the cast/cam will be before you start chopping up your frame

The LTR axle I remember someone trying it but let me search for it

aight man here is the deal with the rear bearings. the z400 on have 2 bearings in the carrier. the ltr has 3- (2 on sprocket side and 1 on brake side), the inside diameter of the bearings are the same on both quads at 40 mm. the difference is the width of the bearings and the outside diameter.

right now im trying to visualize the inside of my carrier. i think that the z400 has a shoulder inside the carrier that the bearing slides up agaist. if you could find some wider bearings i could mill out my carrier to accept the wider bearing and turn down the center divider. I think the problem with the carrier bearings is the width anyhow... they cant handle the torque of the accel, decel, rocks and such, just destroys these stock z400 bearings.... if you could get the bearing number for say a dual row i would be interested in trying to mod my carrier to fit those bearings...

the worst that could happen is it dont work. if it didnt work i would just upgrade to the RAD carrier with the taper bearings

In a Z carrier.. if it's the same diameter axle. Why would Z bearings not work?
As long as they land in the right spots it wouldn't be an issue.
On the LTR swinger the of course are bigger because of the LTR's power and setup.
But for an LTZ it should work right?
It's going to be mainly for TT anyway, so it won't be getting beat up too badly.

I've got some measurements going to come through tomorrow on the TRX 450R axle swap.
To allow the use of smaller sprockets for overdriving, and weight saving purposes... Besides the R axle is lighter than a stock Z axle, just don't know how much, never weighed them

yep the ltr450 has the same diameter axle as the z400

Awesome.. so technically you could run Z bearings on the axle.. Just might not be the best for jumping and rough riding.
That is a quick +4 or so right there

yeah but the only thing is are the brake rotor and all spaced the same. the swingarm on the ltr450 might be wider than the swingarm on the z400... but if everything else is the same then you are right... you might be on to something mister... and i dont guess it would be any different than a g-forch or and other axle. are the splines for the hubs the same?

Hubs are supposed to interchange. I am wondering about the hubs for the sprocket and rotor, how they are spaced.
If they are in the right vicinity it'd be nice.
Cheap +4.. they are going for a little over 100 as take-offs.
I was hoping with the guys we have on here with both bikes, they could pull a measurement on some of this stuff and answer soem questions.. no luck yet..
Might have to send them a PM.

At the same time, for the cost of getting the sprocket and brake hubs with an axle, it may be cheaper or about the same to just get a Gforce and be done with it.

Got a PM sent to one of our multi-owners on here. maybe he'll help us out.

I also finished checking the TRX450R axle size and it's the same.

So as far as size, the LTZ LTR and TRX will trade out.
But I'm still checking on spacing to make sure the sprocket and rotor are aligned properly.

I will more than likely go with a 450R axle, since it will probably require less modification. Also the 450R has a huge selection of rear sprockets, at almost half the price of the LTZ.
The axle in the R is also a touch lighter.

I'll fill you guys in with measurements when I get home tonight.

If the measurements work out for the TRX axle, I will more than likely get a Gforce axle, so i will have an axle that I can change the rear sprocket w/o pulling the massive Gforce nut off.

Might get a wild hair tonight and pop the axle out of my R and see how it lines up.

Well. I finally got around to sticking the axle back in the zuki tonight. got everything installed and adjusted...
After all the work to turn the axle black.. I sat there for an hour with sandpaper and took it back down to metal.

It looks better shiny than black.

Anyhow.. while I was in the shop, I measured the distance between the sprocket and rotor on the Z and 450R.
Well, I say measured, I mean I held up a piece of rod and kinda backyard rulered it.

The honda axle is roughly 2" narrower between the rotor and sprocket.
So it would take a good bit of modification to get that to swap over.


I'm awaiting a measurement from one of our LTR owners to see what kind of difference there is there.
Worst case I'll manage around my gearing limitations.. but I thought it would be nice to have a simple swap for an extra few inches.

I went riding today and made a noob mistake.
About 20 miles into the ride(road riding), the back wheel came off..
appearantly I didn't tighten both rear wheels...
Well, needless to say I've chased the threads and talked the wife into letting me get an axle so I can use my stock hubs.

I'll just be getting the LTZ axle, so no need to continue this unless somebody else is interested in a swap.

Have to admit, I just skimmed this thread - but the LTR axle won't work in the LTZ carrier. Can't put the LTR axle into any kind of LTZ-anything rear setup without major welding and fab on the LTZ carrier housing. The LTR carrier is much wider than the LTZ carrier, and the areas on the LTR axle that the bearings ride on are further apart (even the inner most bearing surface) than the LTZ. I posted on this about 3 years ago, with pics, so if you want to dig the thread/pics up, have at it. I compared the stock LTR axle with the RPM Dominator LTR axle, with a Lonestar LTZ axle. Easy to see why it won't work when you look at those pics.

I have no idea on the 450R stuff, though...

Yeah, it all added up to not working pretty quick.. but it would've been a cool swap.
I couldn't find anything on an axle swap is the only reason I posted this..
But, lesson learned. Just stick with the Z stuff.

Now if I tried with a honda, I could interchange EX and R parts all day long..

Alot of the 250R parts were the originals, too - and EX and 450R parts interchange with that stuff, too - they were derived from it. Something to think about for swaps. Alot of the 250r stuff was far superior to what we're even running now, except for the most recent updates on modern 4 strokes. Example: the twin-piston front calipers on the 250R have plastic pistons, to save weight - and that was in the '86 bikes, from the beginning. Lot's to be learned from that old thing...

Very true. Where've you been Normal? Haven't seen you around a lot lately.

If you are looking for an axle you can pickup a G Force on Ebay for $188 shipped new. Hard to beat that deal.

I think I'll save the extra 12 bucks and do the RMATV deal. I wouldn't question the warranty process that way.

Holidays, man, holidays... Busy, busy, busy.

EDIT - just measured the carriers on both the LTR and LTZ, across the round housing on the swingarms. LTZ (Eyeball Eng. round housing) was 7 1/8". The LTR stock round housing was either 7 1/2" or 7 9/16" across, hard to see for sure. That would be the numbers for the outer edges of the swingarm round housing, or the inner measurements between the mounted sides of the carrier itself.

The LTR definitely uses double-row bearings, too, but it's just too wide at the mounted surface area to use in the LTZ parts.

Yeah, it was a thought.. Woulda been cool to have a cheap +4 though.
Thanks for the measurements.