Rocker spindle misaligned.

Assuming that is, the feed drillings align accurately with the slots, to begin with.

Combat rocker shaft oiling

My rocker shafts came out badly worn on a low mileage Combat. (around 5000 total miles) I got a better set of rockers and shafts out of an RH4 head that I have. On assembly I was carefully checking to make sure the little oil holes from the central oiling point on the head lined up with the...
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komet said:
Thanks for all the replies. Decided to remove head as all spindles were nearly 180 deg out and hot air gun wasn't hot enough. Found exhaust valve guide loose in the head and 2 tappets fitted back to front. The guide is worn internally too, so hopefully that explains the oily plugs and exhaust port.

The previous owner had seized the motor due to a broken oil line and had a full rebuild done by a bike shop, new barrels, pistons, bearings, etc. Found head nuts upside down, metal swarf in the pressure relief valve, as well as a surprising amount of metal in the bottom of the oil tank. Did run and sound OK so think it just wasn't cleaned out properly. So much for a 'professional' $6000 rebuild.
Click to expand...
With all that metal in the oil tank I would remove the oil pump and look for damaged gears.
 
Since the rocker spindles want to drift inwards I have packed a few of them with a small shim on the inboard side so the spindle will always be flush with the head.
 
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