Removing the Rear Sprocket

wbeck257 · September 02, 2008, 04:53:03 PM

I'm trying to remove my rear sprocket.
From what I understand I need to remove the nut on the left hand side (sprocket side).

I cannot get this son of a pregnant dog to let go.

I still have the chain on and the bike in gear.
All I am doing is spinning the motor.
I can't get anyone to stand on the rear brake.

Any tips / hints / suggestions?

Spidey · September 02, 2008, 10:46:32 PM

Which model?

DarkStaR · September 02, 2008, 11:03:06 PM

i'm gonna guess you have an s*r.

Try using a differnet gear. Other than that, at the very least, find someone to stomp on the rear brake.

I use a rear stand that holds the rear wheel in place for such work.

Speeddog · September 02, 2008, 11:51:41 PM

Quote from: wbeck257 on September 02, 2008, 04:53:03 PM
---------snip-----------

Any tips / hints / suggestions?

Borrow an impact gun.

wbeck257 · September 03, 2008, 04:23:18 AM

Quote from: Spidey on September 02, 2008, 10:46:32 PM
Which model?

`06 s2r 1000

Quote from: DarkStaR on September 02, 2008, 11:03:06 PM
I use a rear stand that holds the rear wheel in place for such work.

What kind of stand do you have?

Quote from: Speeddog on September 02, 2008, 11:51:41 PM
Borrow an impact gun.

No air compressor :/

Speeddog · September 03, 2008, 09:19:21 AM

I use an electric impact gun, it's awesome.

Bill in OKC · September 03, 2008, 10:14:13 AM

I used a huge 3/4" drive torque wrench (I already had it) that has a handle about 3 feet long. I was able to step on the brake pedal and reach over the bike to loosen up the nut.

MaxPower · September 03, 2008, 12:36:42 PM

Quote from: Bill in OKC on September 03, 2008, 10:14:13 AM
I used a huge 3/4" drive torque wrench (I already had it) that has a handle about 3 feet long. I was able to step on the brake pedal and reach over the bike to loosen up the nut.

Torque wrench to loosen the nut? Bad for the wrench, no?

Bill in OKC · September 03, 2008, 02:50:03 PM

I don't think it hurt it. It has a ratchet head so I guess it was intended to work both ways. It has factory specifications for up to 600 ft. lbs in both CW and CCW rotation. I bought it for a bolt that takes 300 ft. lbs. so 115 ft lbs is not even breaking a sweat

wbeck257 · September 03, 2008, 02:51:03 PM

I was always taught never to use a torque wrench to loosen a bolt.

I got the stupid make the beast with two backser off a few minutes ago. I figured I was just gonna try an electric impact gun, but I wanted to give it one more shot.
I took a peice of 6" steel conduit from work that happened to be 5 feet long (seriously, it was the smallest I could find), strapped by breaker bar in there, set it up, stood on the rear brake, and it came off w/ no hesitation.

Now I just gotta decide if I want to replace the cush drive sprocket with a one peice one...

Spidey · September 03, 2008, 02:56:36 PM

Quote from: Bill in OKC on September 03, 2008, 02:50:03 PM
I don't think it hurt it. It has a ratchet head so I guess it was intended to work both ways. I bought it for a bolt that takes 300 ft. lbs.

I's still not good for the calibration on the torque wrench. Do yourself a favor and buy a big-ass breaker bar. They're pretty cheap.

Bill in OKC · September 03, 2008, 04:21:20 PM

I agree there are ways to abuse a torque wrench - I should have been more careful in posting what I did - just trying to help but I didn't mean to imply that using any torque wrench to loosen any bolt is always OK. Sorry for the hijack.

hypurone · September 04, 2008, 06:34:01 AM

Quote from: wbeck257 on September 03, 2008, 02:51:03 PM
I was always taught never to use a torque wrench to loosen a bolt.

I got the stupid make the beast with two backser off a few minutes ago. I figured I was just gonna try an electric impact gun, but I wanted to give it one more shot.
I took a peice of 6" steel conduit from work that happened to be 5 feet long (seriously, it was the smallest I could find), strapped by breaker bar in there, set it up, stood on the rear brake, and it came off w/ no hesitation.

Now I just gotta decide if I want to replace the cush drive sprocket with a one peice one...

I recently went thru this for a diff reason other than wear/tear. I went and did a 520 conversion for the weight savings AND did the drive systems conversion as well. Besides being MUCH easier to change sprockets in the future (5 bolts and it's off w/o messing with the big nut!), it looks BAD ASS! Do it, you won't regret it. You don't necessarily need to do the 520 bit...

EDIT: A funny side note: I have an air gun so wasn't worried about getting the nut off at all, nothing fazes this gun. so I go to put it on the nut and the make the beast with two backser is loose!! I mean finger loose!! Holy shit!!

Guys, make sure you check your nuts!!

Capo · September 04, 2008, 07:36:32 AM

Quote from: Bill in OKC on September 03, 2008, 04:21:20 PM
I agree there are ways to abuse a torque wrench - I should have been more careful in posting what I did - just trying to help but I didn't mean to imply that using any torque wrench to loosen any bolt is always OK. Sorry for the hijack.

If yout torque wrench is reversible i.e. capable of measuring torque in either direction, you have nothing to worry about.

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Removing the Rear Sprocket