OzVMX Forum

Clubroom => Tech Talk => Topic started by: jason300 on October 15, 2014, 09:04:11 pm

Title: rm 400 headstem bearings
Post by: jason300 on October 15, 2014, 09:04:11 pm

Gday just fitting tappered headstem bearings and i remember i had to turn down the shaft size in the lathe on my last one to allow bearing gap to close up, does anyone know how much i will need to take off cheers jason

Title: Re: rm 400 headstem bearings
Post by: Momus on October 16, 2014, 02:02:40 am

I've just done this job on my 500.

I trial assembled the steering head with the new bearings. Sure enough the top bearing was sitting up a few mm from home.
I measured the vertical free play in the shaft and added 6 mm as the amount the journal was lengthened.

If you've done this before you would be aware of the possible difficulty of getting the shaft, or shaft with lower triple clamp to run true for turning.

I had press out the shaft and use the 4 jaw rather than set the triple and shaft up to run true between centers.

Marcus

Title: Re: rm 400 headstem bearings
Post by: oldfart on October 16, 2014, 08:19:18 am

It's documented in here some place Shown on verniers is total length to allow for bearing  fitment.
(http://i72.photobucket.com/albums/i180/mutchoo/360.jpg) (http://s72.photobucket.com/user/mutchoo/media/360.jpg.html)

Title: Re: rm 400 headstem bearings
Post by: jason300 on October 16, 2014, 03:04:43 pm

Thanks for your help that made it easy