Lubrication of the rocker arms

not sure but I think they upped the oil flow to the crank and blocked the hole in the head.

Ive been looking at mine they are holding up good but if you wanted you could make better use of some of the oil flung up by the chain and re direct it to the rocker arm holes with small pipes or even make tiny cups over the rocker pin bores in the rocker cover near the sprocket to catch the oil and a small groove along the length of the pin at the top would carry the oil along it. all pretty simple or do what some do and run a pressure line to the rocker pins or at least to drip into the holes in the arms. there is an oil gallery still in the cases but not the head could pick up the oil from there and run a line over to the pins.

I think consensus was that reliabilty went up when they incraesed oil feed to the CB and the big end

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regards
Bushie

whato armin

your engine should have an oil feed to the head? yes the small 'tunnel' or 'drilling' should come up and into the rocker cover? if yours is blocked and just aluminium, does your rocker cover hav a vertical breather, two breathers or a single breather angles to the headstock please?

you may have a different rocker cover?

regards

Taffy

ok

they stopped the oil feed to the head in 2004.

regards

Taffy

we pulled the head off lens berg(98 model)the one in my gallery & it had no pressure feed to the head,the rockers had large inlet holes for oil to enter them by splash feed.my 2001 model has small holes for oil to exit them from pressure feed.pressure feed always sounds better lubrication but his splash feed rockers has held up well,just don't put the small holed rocker on a splash feed motor.
..weed..

i would leave it there, personally. two breathers i think, are very good for a healthy engine. if you fall a lot - then maybe not but you never fall off, right???!!!!

regards

Taffy

OTTMH about 02 or 03 they pressure fed the val;ve gear. This may also have coincided with the change in follower bearings which also happened about then. Prior to that it was all splash which was why when fitting later 03 rockers and followers you have to drill the rocker to get an oil feed to the shaft. 04 on it was abandoned again.

Steve