Richards newly found race bike.......pt 2
Lots of hard work has been going on since the last site update in Feb
'07.
The
crank was rebuilt with a new Arrow rod & the assembly began on my kitchen
table - note the large hammer.
No big problems. Tight bearing inners were eased by careful polishing of
the crankshaft to allow hand fitting of the bearing inner (in the case of the
drive side roller) & ball race used on the dynamo side.
The engine is being kept as near to 1964 spec as possible so the chain
drive cam system has been retained.
Its not a system I have much faith in so we will be keeping an eye on the
tensioning springs. A NOS timing chain was to hand so that is in there. Even the
fibre oil pump/points drive has been retained.
A
long days work produced a completed bottom end. RMs 5 speed box ,unlike any
other Parilla 4 or 5 speeder, had to be loaded into the cases prior to closing
them. The standard clutch & spring is retained too
Who said we wanted it to be easy?
That was the last I saw of the engine for a couple of weeks until it
returned fitted to the cycleparts ready for wiring, ignition timing &
fitting of the CEV 6055 "AC magneto". Since the bottom end rebuild RM
had fitted the timing cover ,
barrel
& (very distinctive) dynamo/selector cover. Quite a few alignment/adjustment
problems were encountered but RM stuck with it & the gears now select
perfectly.
The CEV 6055 was an unknown quantity to me having either used battery
& coil or CDI systems. RM had used them with great success back in '64 so,
as a batteryless system, it was worth a try & of course entirely correct for
the bike. I selected the best looking unit we had & removed the internal
condenser replacing it with an external (& easily replaceable) new unit.
Old
condensers always give trouble in my experience & the one in the 6055 is
hard to get at & soldered in to the wiring - not ideal for "Paddock
Panic" replacement!
The remote points, with manual advance, is a far better system than the
internal, fixed advance type first used with the 6055 but the points cam gave us
some problems. It was not possible to get the correct timing within the
adjustment range of the points backplate. After much head scratching another
points cam was tried & we were able to get 50deg on full advance. I'm not
sure if this was due to a cam that was "stoned" or just indicative of
the poor quality control of the period. Testing gave us a spark so the 6055,
which could not be simpler, might well prove to be the system of choice, only
its need of an AC coil (not a common unit) concerns me should replacement be
needed.
RM now was able to refit the head & start to prepare for the engines
first bark in 43 years....
So
Saturday 2nd of June 2007 was set for the first fire up of the now fully rebuilt
bike. Luckily it was a dry sunny day & she was looking good propped up
outside RMs front door.
A few "bumps" provided the odd whimper but nothing which could
be considered as "running". The oil used in assembly combined
with our over enthusiastic "tickling" had wetted the plug. A session
with a gas blow lamp dried out the plug & we tried again. Luckily RM had
invited his son
Chris over so we had two enthusiastic pushers to keep it turning
over.
After a few yards she struck up & the strident bellow of a Parilla on an
open mega was heard.
A couple of laps of RMs (thankfully circular) drive allowed us to savour
the moment & enjoy a sound not heard for quite some time.
Now the bike could be fully assembled & taken for its first track
"shakedown" session
So the date was set for its first track outing - Mallory Park afternoon
practice session Wednesday 6th of June '07.