2 3/4 half time pinion retaining nut

[Ian]

Hi folks, its so long since I have had the 2 3/4 completely apart my memory is not good. Is the nut that holds the pinion to the crankshaft reverse thread ? The one with the ball and spring it it. I cant for the life of me get it to move.

[Hutch]

Hi Ian,

Pretty sure from memory (and mine is not that good also!) that it is normal right hand thread i.e. undo anti clockwise. Will double check later for you when I have a chance to look in the shed. They should be tight-ish as if they come undone they act like a cutter and can make  a neat hole in the timing cover. Maybe lok-tite has been applied in the past so a little heat might be required to soften it?

cheers

Ian

[Ian]

Thanks - just managed to get it out - impact driver works ! It was a RH thread.

Mine did that cutting of the timing cover many years ago thus how tight I put it in !

[Hutch]

  

[a1mick]

just pulled mine off today, easy to undo, it fell off and had started to cut timing cover, ball and spring? mine had neither, not in the cases, its a air release valve? why? for what? is it necessary, i'm thinking not because obviously my bike never had it?

[Ian]

It’s pretty important as it ensures oil will mist through into the timing case

[eddie]

and also creates a partial vacuum in the crankcase which assists in drawing oil from the tank!

   Eddie.