hey guys,

well was about to do the black driven spring install and noticed I didn't have a 27mm socket, so I didn't really even get started on it. I made my spring compressor tool already...

well, let me get to the point of this post... when I was taking off my cvt vent boot, I noticed the swingarm boot was ruffled a little bit. I inspected closer and it's slightly torn.. Has about a 1/2" rip in it. I figure a stick got in there and ripped it a bit.

Wondering if I should be concerned with this? Anything possibly be damaged from it? The rear driveshaft goes through that boot, doesn't it? I guess I'm gonna look up the part numbers and order a new one. I also noticed when removing the cvt vent boot that the screws on that were kinda stripped. I guess the dealer used a electric screwgun and stripped them a little bit. So I'll order some more of these.

Anyway, just concerned about the swingarm boot... should I be?

Thanks for any help...

oh.. just incase anyone gets confused as to what I'm referring to.. it's the boot you see on the right side of the machine.. bottom back side of engine going into swingarm.. that rubber boot...

 

Yes you should be very concerned about a ripped boot. Not exactly sure how it set up on the 650 i havn't looked at mine close but on a honda a ripped boot allows water to enter through the hole and goes right back into the rearend differential. On the Honda recon it wipes out brakes and bearings fast but like i said not sure on the 650 with the sealed wet brakes and all. But i would be sure to replace soon or for a quick fix fill boot with grease and then silicone the hole up. just some feedback for you.

 

I don't know what happens for sure. There is a seal to keep the crankcase oil in, a seal to keep the final drive oil in. That propeller shaft probably has seals in it's ujoint. I would be concerned about the seals. Other than eventuall messeing up the porpeller shaft or the two seals, having a torn boot won't affect a whole lot.

I think someone said that he was able to go quite a few miles before he had problems with the propeller shaft. It may be possible to hurt the seals with all the stuff you would get inside that housing, but I'm not sure. Also, if the splines for that shaft rust from water getting in there, that would be bad too.

It actually doesn't look like the most difficult thing in the world to get the rear arm off and replace that boot.

 

On your scale of 1-10 nyroc, what am I looking at here to change the boot out myself?

I guess my order for my repair manual will be going in to ron ayers immediately, along with a new boot.

Can someone with a repair manual look in there and tell me how difficult it looks... what kinda rating in difficulty am I looking at you think.

I may just loosen up the boot and take a look around in there tomorrow and see if I can see any residue of water/sand or anything in there.. if nothing, I'll clean it up real good and patch that boot until I can get the needed stuff to properly replace it.

I guess I'm gonna start designing my skidplates tomorrow to keep this from happening again...

 

I think it is a 5 on a scale of 1 to 10. Maybe a 4 if you already have the big sockets.

It looks like a no brainer. You undo all hoses and cables to rear arm. Undo shock. Undo boot clamps.

Use big sockets to get the right pivot shaft out. It is just a big bolt.
Left pivot shaft has a nut. remove that and then remove the shaft.

The swingarm should slide back since the drive shaft is just splined. No circlips.

Easy.


torque right pivot shaft to 112 ft lb
torque left pivot shaft to 14 ft lb (I double checked what I typed here for the torques)
torque left pivot shaft nut to 112 ft-lb

shock bolts 46 ft-lb

 

DO NOT DRIVE IT WITH A TORN BOOT!!!
I did just that with my old kvf400 and it ruined the splines on the propeller shaft due to water ingestion. Cost the best part of $500.00 bucks to get fixed.

 

thanks for the info NYROC and everyone else... I'm gonna take a closer look at it tomorrow and patch it up best I can until the parts get here. If it looks bad I'm not even gonna think about riding it.

 

There's a spring at the end of the prop shaft. Don't lose it when you take the swingarm off.