Here goes after another long break in posting what little progress has been made, not made any easier by my camera acquiring a bad case of 'young daughter syndrome' -
( You know the thing; 'Dad, did the lens always flop about like this?').
Well, first off, once I'd cleaned up my super cheap Comstars which came up looking almost like new I decided that the discs needed some nice new holes to go along with the other brake mods.
Solid six hours marking out and drilling!

Them divils is tuff stuff
So the chassis is almost finished now, just waiting for a 79 speed drive to arrive so the front wheel can go in.
The rear end is finished.
New saddle, new Hagons, New BT45s, new grab rail, Bill's great paint job!
It's getting there.
Time to start on the engine
I know a lot of you will think that's doing things ass-backwards to do the chassis first but my thinking was that engine parts were more likely to be available than anything else.
Well, I guess I knew what I was in for with the original 76 motor just by the state of the rest of the bike.
Pulled the screen first. Loads of muck plus bits of seal and O ring.
Pulled the clutch. Thats the chewed clutch nut you see there!
The belled washer was totally missing!
The clutch centre has had the stops that locate the tabbed washer broken off.
The shock absorber plate had its stupid brass rivets sheared so that the spring steel strips had come out and damaged the clutch basket.
Brass rivets holding spring steel!!! What the hell kind of engineering is that?
The neutral switch that I knew was bad was solidly seized into the case. Nothing would move it. ( I eventually got it out once I had split the cases and removed the gear train, by hammering it out. Yup, it was that solid!)
Split the cases. As I pulled the left side off bits of piston ring fell out of number two piston
Number four piston has marks on the skirt where someone has let it drop onto the gear train previously!
Stator wires where they come through the case had the insulation damaged on all three. PO had simply squirted silicon sealer around them

. Unbelievable!!!
Primary chain totally done in.
The two top engine mountings where the shroud goes are toast.
But, joy of joys, the crankshaft seems to be OK apart from some condensation staining on the flywheel.
Oh yeah, the heads. Left side 371 cam, right side 431 cam; 371 auto advance with buggered springs.
The carbs incidently were '75 755As jetted as for a '79
How the hell did this thing ever manage to run.
The plan was to fit the other 79 engine I have with the 76 crank, refurb the heads as per 75-76 ( got new cam on the way) and completely rebuild it.
The carbs have been totally overhauled and rejetted.
But I think now in view of the length of time it's taking I'll just do the heads, redo the 79 crank timing marks, change the belts and anything else obvious and stick it in to get some mileage out of it for this summer.
I can get a set of cases and take the time to do a proper rebuild of the 76 that way.