Topic: axle diameters

[jjoe256]

Can anyone verify that the diameter of a 78 CB750 SOHC's front axle is 14 mm and the rear diameter is 20mm? Thanx,Joe

[bwaller]

Without getting my ass to the shop I believe the front is 15mm & the rear is indeed 20.

[Clyde]

15mm (6302 bearing) and 20mm (6304 bearing)

[jjoe256]

Gee,that's strange. I'm sitting here in Seattle,Wa.,USA,with a front axle off a 1978 CB750,and an axle off a 1971 CL450 and using the same caliper that told me my rear axle is 20mm,tells me both front axles are 14mm!! I made the post because I read elsewhere in the forum that it is 15mm.?

[754]

Digital or vernier caliper? The vernier I use, because the way the lines are etched, I often an reading wrong line and am out 1mm, if I am not careful....its because the 15 25 etc is beside the line not under it.

[jjoe256]

    Mea culpa,mea culpa. The "14"mm axle was small enough to snug up all the way in my calipers past the measuring portion,while the 20mm axle caught the measure. When I slid the "14" back into the measuring portion,low and behold it gained a mm! So,yes,the front axle is indeed 15mm. If anyone needs axles made,check out:

http://radicalcustommotorcycleparts.com/parts.aspx

My axle cost $35.

     Thanx. If I hadn't stumbled across an axle discussion,I would have ordered the wrong axle!

                                                   Joe