Flywheel nut question

[joey11]

I bought an 03 EC 250 Dealer Edition a year or so ago and have ridden the heck out of it since. This was my first real enduro bike, and now that I'm getting faster, I think I want a little more snap. I opened up my ignition cover yesterday and to my surprise, there was a FWW added by the previous owner. I thought everything was stock. I took the weight off, and I want to try the bike this way, as I am sure it will liven it up. The problem is that I don't have a nut to put back on the crank bolt. Does this matter? It this nut a special piece? It appears the nut would have threads on the outside and on the inside to thread on to the crank bolt. I also am guessing that I will need a thin walled socket (FWW took a 22mm) to get it tight. Any help would be great.

[rpduc]

Well you DO obviously have to have a nut on there.
The stock flywheel nut is just a flanged nut, maybe hardened, maybe special threads.

It appears the nut would have threads on the outside and on the inside to thread on to the crank bolt.

The threads in the flywheel are for a puller.

I'm sure Go Fasters can send you a flywheel nut pronto, and a standard socket should work just fine.

[PEB]

Like Ross said you need a nut ontheir. I would take your flywheel down to your local hardware suppplier and have them find a regular nut to use should be no big deal, or order one from GF.

Paul B

[joey11]

Thanks Guys,

I took the FWW to the local Hardware store and found the details. It is a 12mm with a 1.25 pitch.
They had regular hex and lock nuts, but no flanged nuts. Do you think it matters if it is a flanged nut or can I just use one of the others?

[Skidad]

Order yourself the correct nut but in the meantime a regular nut WITH a washer and a dab of blue locktite should be ok IMO. Just change it when you get the new one.


Skidad in MA