Happy chappy day.

[Davey B]

I love threads like these...and I thank Mikey (and everyone else who takes the time and effort to photgraph and write up the stages involved!) for posting. One day, I'd love something like this as a Sunday best bike

 

[theoneandonly]

the cage has broken .
how does it do that ?

 

[mikeyboy]

the cage has broken .
how does it do that ?

I think the side of the outer roller housing wears then the needle breaks out.
It can cause some hefty scoring on the support posts

 

[Paul Young]

I think the side of the outer roller housing wears then the needle breaks out.
It can cause some hefty scoring on the support posts

I’ll hazard to guess the break is in the small circle and the scoring started in the larger area..?

 

[mikeyboy]

I think the side of the outer roller housing wears then the needle breaks out.
It can cause some hefty scoring on the support posts

I’ve given this more thought.
The roller breakout pictured is at the bottom bearing.
Because the thrust from the pushrod is from the bottom of the the rocker it’s always going to push the rocker up.
Hence the wear on the lower shoulder of the outer sleeve.
Rocker pushed up,needles squeezed down.

 

[davnjud]

I’ve given this more thought.
The roller breakout pictured is at the bottom bearing.
Because the thrust from the pushrod is from the bottom of the the rocker it’s always going to push the rocker up.
Hence the wear on the lower shoulder of the outer sleeve.
Rocker pushed up,needles squeezed down.

Yep that’s what I’ve read elsewhere. Both my R80 rebuild exhaust valve rocker lower bearing cages were cracked and valve guides worn at 45 k miles.

 

[Mad Hatter]

The machining on those one piece rocker pillars looks a bit shite Mikey, where are they from?

 

[snelly]

one of the old rockers,caught just in timeView attachment 455330

Bloody ell ; talk about nick of time;

 

[mikeyboy]

The machining on those one piece rocker pillars looks a bit shite Mikey, where are they from?

No manufacturer marks but I think they might be vank.
I’ve just taken a better look at them in the metal and I think the photo is not doing any favours as they are oily and dirty from storage.
Once they have been ultrasonic cleaned they’ll look a lot different.

 

[mikeyboy]

Yep that’s what I’ve read elsewhere. Both my R80 rebuild exhaust valve rocker lower bearing cages were cracked and valve guides worn at 45 k miles.

Definitely pays to check and reset rocker end float when doing valve clearance checks.
Helps to minimised the upward push thrust from the pushrods,wear on the rocker arm pads and debatably ,valve guide wear.

 

[john1961]

Definitely pays to check and reset rocker end float when doing valve clearance checks.
Helps to minimised the upward push thrust from the pushrods,wear on the rocker arm pads and debatably ,valve guide wear.

great work going on,am enjoying this very much,thank you for this.

 

[mikeyboy]

The machining on those one piece rocker pillars looks a bit shite Mikey, where are they from?

Bit different now they are clean

 

[mikeyboy]

A lot easier to shim up rocker end float with these mounts

 

[mikeyboy]

it helps if you have a good selection of shims

 

[mikeyboy]

New valves and guides,new springs collets etc

 

[mikeyboy]

Exhausting work.
Beer o clock

 

[Tinytim]

Exhausting work.
Beer o clock
View attachment 456232

As ever, I am in awe of your work.

 

[mikeyboy]

Few more bits fitted

 

[Mad Hatter]

Bit different now they are clean View attachment 456226

Much better Mike

 

[mikeyboy]

Made a start fitting the new wiring loom,
The correct basic/kalahari one.
Rarer than unicorn piss and twice as expensive