125-200cc flywheel nut

Whats the best way to tighten a flywheel nut,engine wants to spin,maybe impact wrench?Is there a tourqe spec on a 02 cr 250.Thanks for any help.

Try putting the trans. in second gear and apply the rear brake while tightening the flywheel nut.

I will give that a try,thanks.Been doing some reading about the stator and flywheel,does an 02 cr 250 have a woodruff key?If so,what does it look like and where is it located?Sorry for such a newbe question,just first time doing this type of repair.

there are holed tools made specifically for this, but a "spanner" will work
this is a Proto too, I used it to set up Ford 9 inch axle carriers

Impact gun has worked great for me.

Thanks for the info 2premo,




I bet I can find something similar,do you know if they have a key,because is so mine was missing.Thanks

the key is handy but not mandatory
don't for get to lap the mag to the crank with lapping compound before assembly
if you don't use the key, use a dial indicator to check your timing, well you should use it either way

Thanks for the info.

Another option would be to use CLEAN nylon rope in the cylinder (feed it in through the spark plug hole) to lock the engine up. Just be careful not to get it in the ports.
That's how I do it, works well!

The torque settings for the flywheel are 73.5 to 83.3 Nm OR 54.2 to 61.5 Lb/ft

All the best with it!

I have given up on it,it has beaten me.I have tried a different coil,stator,cdi,plug,killswitch and still no spark.Its going to Halls unless I can sell it cheap!

Sorry to hear that it's been such a nuisance. Must be an earth leak hiding somewhere. I'd buy it but I'm not Stateside at the moment.

https://www.motionpro.com/product/08-0427

https://www.steahlyoffroad.com/engine-lock-up-tool

Later,

If you're working on the engine and have the clutch side case off you can stick a penny in the gears and lock the crankshaft. The penny is soft enough not to damage the gears but it will bend it and it can only be used a couple of times before it's destroyed... then you have the major financial burden of getting another penny.

I like that Motion Pro tool! That's clever! I just used to use a copper washer to jam the primary gear! They are soft & don't damage the teeth. I must admit though, the MP tool looks easier to use! I think I might go buy one!

I've also used a strap wrench on the flywheel side to hold the flywheel as I torqued the nut. I was too lazy to drain the oil and pull the clutch covers. Trick is put her in fifth and have your eighteen y/old hold the back wheel while you hold the strap wrench in one hand and operate the torque wrench with the other.
Despite Sears going the Harbor Freight route lately with the cheapo tools, they still make a decent strap wrench. I also have one I got at ACE, and the strap is flexible like a large rubber band -- it's useless.