How do I find out my Axle size?

[mikelamb]

i have a 98 ktm rxc 400 with the lc4 engine. how do i find out my front axle size?

thanks
mike

 

[WaltCMoto]

Have you considered taking it out and measuring it?

 

[mikelamb]

yes but i dont have the tools at my house to do that but that seems like what ill have to do

mike

 

[TM-Frank]

You find a lot of bearing code numbers in KTMs' spare parts catalogues or online at ktminfo.com. The site with the exploded view of your bikes' front wheel says that the whell bearings are one GROOVED BALL BEAR.6003 2RSR.C3 and one GROOVED BALL BEAR.6203 2RSR.C3.
With these bearing numbers you go to the website of a bearing manufacturer, such as www.skf.de and search in the product tables for the dimensions of 6003 and 6203 barings.
Voilá, your axle is 17 mm in diameter.