Uh, you use the impact wrench to put it back on...good rule of thumb, if it takes an impact wrench to remove it, probably gonna have to use it to reinstall as well...

 

There is another option...

Some people say you can hold the engine still by using the rear brake, but I have not found that to work on my 750 (wet clutch). In first gear the brake is not strong enough, and in any higher gear the clutch slips.

However, I was able to hold things still with a big metal handled rubber strap wrench around the rotor. It is a two-person job really, but it works. Works for both removal and reinstallation, if you don't have an impact wrench. At least this way you can set the torque to spec, rather than just being an animal about it. ;D

 

if you're putting a new clutch pack in, then the old clutch disks that slip over the hub can be used to make a very cheap/good clutch holding tool.
stack the disks on the hub and weld them together (the disks to each other, not the disks to the hub). then weld a long (2 foot or so) metal handle to the stack of disks. something beefie but not outrageous.
when tightenning to 150 ft/lbs, leave the tool on the hub, allowing the handle to touch the ground in the direction of rotation. make sure the bike's secure so you don't tip it when applying torque.

or... use a shorter handle and let it come to rest against the rearsets when applying torque, but i prefer the lever against ground idea.

use a torque-wrench IF it's a good one AND has an accurate torque setting.



EDIT!!!
i'm such a putz... yeah, this post was for tightenning a CLUTCH nut... for the flywheel, shift the bike into the highest gear and have a friend apply the rear brake.
if not available, slide a 2x4 through the rear wheel so that it comes to lock against the swingarm when applying torque. bike of course should be on a stand and red ("permanent") locktite should be used.

 

Use a penny. Do a search on speedzilla, there was some discussion on this subjuct a whike back. [thumbsup]

 

Penny or a piece of copper in the gears

The copper will deform before the gear teeth give

I think it is a bit getto but it workd well for me.

 

I did mine yesterday.. I held the clutch and used a torque wrench. its bloody tight and probly should be a 2 man job because ya gotta hold the bike as well, but I managed on me own.

 

Penny or a piece of copper in the gears

The copper will deform before the gear teeth give

I think it is a bit getto but it workd well for me.

That sounds like the best way so far. I went and picked up a 30mm deep socket yesterday and just waiting for the flywheel now.

 

Yes, a penny between starter idler gear and the big gear by the flywheel. Works well.

 

Ditto on the penny trick.

Intalled my new flywheel yesterday and that technique worked great for tightening the 30mm. 

Uh, you use the impact wrench to put it back on...good rule of thumb, if it takes an impact wrench to remove it, probably gonna have to use it to reinstall as well...

I would definately advise agaist using an impact wrench to tighten the 30mm nut.  Torque specs were created for a reason.  If your cheap like me, go buy a good torque wrench at someplace like Sears, use it, and then return it the same day.    >