|Contrary to the beliefs of many one-make
enthusiasts no manufacturer ever made a bike which was devoid
of design errors. Likewise the suppliers of ancillary
equipment had their own problems which often compounded the
manufacturers errors. Add 50 years of damp & deterioration, the
benefit of hindsight, improved materials & technology & we
have the opportunity to improve on the product of Mr Parrilla.
The Hicam Parilla engine was an innovative design for its day with
many unique solutions to problems which other marques handled in a
more conventional (& some may say heavyhanded) way.
Here we will consider the improvements we can make to the engine & ancillary equipment. If your bike is for show & light (or no) road usage then these modifications will be of no, or little, interest. The OE (original equipment), if in good condition, will be perfectly adequate. If you are considering track use, regular road usage or entering an event such as the Motogiro D'Italia then they will be worthy of consideration.
Where do we start?
|The biggest improvement to the reliability of the machine as a whole is to both improve the charging system (including a change to 12v) & remove the need for a fully charged battery to power the ignition system. The OE CEV or CESA 6v dynamo & mechanical voltage regulator can be made to work ( I completed my first Giro D'Italia with just such a setup) but its complication, lack of spares availability & at best marginal charging capacity (40w) make it a weak point.|
Vape 12v alternator & self generating CDI.
|An answer to the problem of providing
a reliable & improved charging & ignition system can be
solved by the fitting of a Vape 12v CDI combined ignition &
charging system. A 12v charging only system is also available should
you prefer to continue with a points & coil arrangement. See the
The fitting process - remove CEV rotor & fit Vape baseplate.
Fit stator & prepare to time the rotor
|Set the crank to the appropriate
fully advanced ignition timing for your model
Continued on Electrics 2