thank you

 

If it works I have an axle I would sell cheap. Also the 250r axle has 25 spline hubs and the 400 has 24 spline hubs, but other than that the 400 and 250r are the same.

 

I can help in this dept.

I don't know too much about the 400ex axle other than that it should be about the same overall width as the 250r.

But,

I know that a 250r axle will not fit in the 300ex swingarm. The bearing journals on the 250r are wider than the 250x, 300ex (the rear of the swingarm is wider). The only way you can get a 250r axle in a 300ex is to install a 250r swingarm on your 300ex.

Although,

You can make a 350x axle work in your swingarm. You would just need to have the 300ex sprocket carrier pressed off of the axle and pressed on the 350x alxe. Advantages in this swap would be a 25 spline axle compared to the 24 found in the 250x, 300ex. Also the axle is adjustable from the factory and it is wider than the 250x, 300ex axle.

 

the 300ex bearing carrier is about 3/4 inch narrower than the 250r. i ran into that problem. it will NOT work. i have a durablue eliminator 2+2 for sale if interested.

 

yea I decided not to try it. later

 

sory i didn't get back sooner i did not forget. sory

 

thats ok