Sprag Bearing Outer Race

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Elliot
Cucciolo - the Lil Pup
Posts: 20
Joined: Tue Apr 18, 2006 9:19 am
Location: Christchurch, New Zealand

Sprag Bearing Outer Race

Post by Elliot » Sat Apr 04, 2015 12:19 am

Hi folks

I am replacing the sprag bearing outer race on my 78 Darmah. This is the one held in with 6 screws and located on two pins. How does this come out? Do I need a gear puller or do I press out the internal taper and then push the race out using a hydraulic press?
I am replacing the sprag bearing with later model upgrade kit. I note that one of the things I will likely have to do is then adjust the backlash between the clutch basket and the primary pinion.

How is this backlash measured and where should I be adjusting this?

Thanks for your help,

Elliot
Owner of two 78 Dramahs as I can't afford a 900SS or a Greenframe!

Elliot
Cucciolo - the Lil Pup
Posts: 20
Joined: Tue Apr 18, 2006 9:19 am
Location: Christchurch, New Zealand

Re: Sprag Bearing Outer Race

Post by Elliot » Sun Apr 05, 2015 7:02 pm

I got if figured. In the cold light of day the sprag bearing outer race is actually the flywheel. I was confused because I bought a sprag bearing upgrade kit from Vee Two and the outer race of this unit was effectively a lightened flywheel and was a lot smaller. Therefore with the new parts I had in hand i was expecting to press out a race from inside the flywheel.

So if you read this post and were confused - so was I - but now sorted. I fitted the new outer race to the primary pinion gear and but now the gearing backlash between pinion and clutch basket is even more important due to the possible differences between original flywheel and new lightened version.
Owner of two 78 Dramahs as I can't afford a 900SS or a Greenframe!

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Craig in France
Cagiva Elefant
Posts: 813
Joined: Tue Mar 23, 2004 3:58 pm
Location: Montpellier, France

Re: Sprag Bearing Outer Race

Post by Craig in France » Mon Apr 06, 2015 3:27 am

Elliot wrote:So if you read this post and were confused - so was I - but now sorted.
Gotta confess, Elliot - I was :) . I was waiting to see what anyone else replied.

But 'All's well that ends well ...'

wdietz186
888
Posts: 671
Joined: Sun Sep 10, 2006 4:40 pm

Re: Sprag Bearing Outer Race

Post by wdietz186 » Thu Apr 09, 2015 5:23 pm

The gear backlash is not adjustable. The distance between the shafts is set by the cases, and with the helical cut of the gears the clearance isn't that big of a concern. I do remember some primary gears were noisier than others but with all the other noises the engines make it just adds some charisma to the whole deal.

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