rear sprocket nut clearance from swingarm ('00 Monster)

[COP TZR]

Hey folks. 

I had done a 5.5" rear wheel swap on my 2000 M750 2yrs back and I have a bit of concern with the very minimal clearance of the tops of the sprocket nuts to the inside of the swingarm.  Chain alignment looks pretty straight, I've got the sprocket carrier from a 5.5" rear wheel on, and I've even flipped the front sprocket.  I have also swapped my steel dual swinger for an aluminum one, which I know is a little more "boxier" vs. the steel one.  I literally have about 2-3mms at most of clearance.

Need some peace of mind here.  I'd hate to be hard on the throttle and have a mishap.

Thoughts, advice, pics......  Thanks 

[Slide Panda]

Of course I've got the wheel off my 900S at the mo... but it's pretty close between the sprocket nuts and the interior face of the swingarm.   

[COP TZR]

Of course I've got the wheel off my 900S at the mo... but it's pretty close between the sprocket nuts and the interior face of the swingarm.   

I'll post up a pic.  I never really paid attention to it until now.  I had just refinished my wheels and installed an Ohlins rear shock, and upon the re-install of my rear wheel is when I noticed the minimal clearance. 

[Staggerlee]

'Bout like this?



'00 M900s, btw.

[SpikeC]

 So it has been 2 years with no problems and you are now concerned?
Don't panic! 

[Speeddog]

2-3mm?
That's a mile!

I've got ~1.5mm on the aluminum swinger/5.5" wheel combo (from a '00 M900) that's on my '98 M750.

[COP TZR]

Well by your feedback and photos, I guess I'm safe. Can't believe how close it is.

[koko64]

Some sprocket nuts have a better fitting flange and sit in the sprocket recess better (if the sprocket has them). This can give more clearance.
Some sprocket nuts are just longer and protrude past the sprocket bolt taking away precious clearance. I would change sprocket nuts to ones that fit at least flush with the pin bolt.
Some sprockets aren't recessed for the sprocket nuts robbing a mm or two.

I'm using short multipoint TPO nuts with small diameter flanges on aftermarket CCW sprockets with a deep recess for the nuts. A whopping 4-5mm clearance!

[COP TZR]

Some sprocket nuts have a better fitting flange and sit in the sprocket recess better (if the sprocket has them). This can give more clearance.
Some sprocket nuts are just longer and protrude past the sprocket bolt taking away precious clearance. I would change sprocket nuts to ones that fit at least flush with the pin bolt.
Some sprockets aren't recessed for the sprocket nuts robbing a mm or two.

I'm using short multipoint TPO nuts with small diameter flanges on aftermarket CCW sprockets with a deep recess for the nuts. A whopping 4-5mm clearance!

That makes sense.

[Raux]

'Bout like this?



'00 M900s, btw.

why does it look like your wheel is flush with your swingarm? is there no spacer?

[koko64]

Good point Raux.
Also, the nut flange is sitting on the sprocket and not in the recess.

[COP TZR]

maybe the cone spacer between the swingarm and wheel is backwards?  Does the flat side of the cone spacer sit against the swingarm or does the cone side?

[COP TZR]

maybe the cone spacer between the swingarm and wheel is backwards?  Does the flat side of the cone spacer sit against the swingarm or does the cone side?

Never mind...... I realize the flat side sits against the swingarm and the cone side should face inwards towards the wheel bearing.

[koko64]

I can see alot of the sprocket nut flange as if it isn't sitting in the sprocket recess. Sometimes the flange diameter is greater than the recess, or the sprocket lacks them.