A good strap wrench works, braced against the footpeg.

 I found the pic, I thought I had deleted it. I just use a Harbor Freight torque wrench, they work great and are cheap!

 

Jeez, alright I’ll have to figure something out to get her tighter. I think I’ll have a heart attack tightening something that much but we’ll give it a go 

I hold it with my hand and use my air or battery powered  impact. Seems to work for me Fingers Crossed 

I've posted before that I used a 1/2" cordless impact gun, holding the flywheel with my hand, just using my own judgement and watching the movement of the socket. I recently used a strap wrench and torque wrench just to verify it, and it was around 45 foot pounds. I bumped it to 50 just because.

Thanks! The biggest impact I have is the 3/8 so I just ordered a new holder. Sucks to have to wait a few days but this guy has been such a pain for me I’d hate to have more problems just due to lack of torque. I think I’ll still struggle getting the torque as I haven’t had great luck using those holders but I can also pick up a strap wrench. Hopefully she runs like a top after this but who knows.. I’ll probably do a top end in the near future too as the cylinder isn’t showing much crosshatch. Want to get it done by the weekend as I am going to pickup my rt3

Most 3/8" impact wrenches will go far over 45 to 50 ft lb, so I don't see any reason why you can't use what you have. The only thing is, it's kind of a guessing game, unless you have a way to test it. When I used my half inch impact wrench, I put a piece of tape on the socket with a mark, so I could watch the socket move. I stopped when I thought it had turned enough. I either got lucky or was very good, because it turned out to be around 45 foot pounds. In fact you have less chance of stripping or breaking anything with a 3/8" impact wrench. That said, if you go for it, don't come at me if it breaks :0)

Thanks, I think what I’ll do is verify the torque this time and then next time I’ll know. 

 I'm just thinking my 3/8 drive is pretty useless but is about as old as me haha. That's talking an air driven one relying on compressor being right up. Mabe a modern battery one fully charged is much more possitive than what i'm talking. On the 250 & 360's you'll soon know if its not tight enough as will shear off the crank key. Sounds like you have a good plan though. ya probably gettin sick of seeing my methods but like i said before my cranks are dodgy from previous damage.

Definitely not sick of it RT325, I believe it is great to be overly cautious and I asked the question to see everyone’s method of doing it. This is a new impact with a full battery, it has pretty good beans to it. I’ll have to update with my findings from my torque wrench 

RT325 I like your shift rubber  Yamaha yellow color