So you have a Moto Parilla hicam and it’s a lovely little thing ….but either it won’t start easily or it gives you a violent kick in the pants (to remind you it’s not a Honda) every time you attempt the starting ritual:
Tickle the carb, shut the choke a little, retard the ignition (if you have manual), priming kick or two, ease over compression, ignition on, good swinging kick followed by a jarring kickback & a minute hopping about on the good leg. Familiar?
Well, it was to me when my bike was on the standard points ignition & it got worse when I changed to the Vape CDI. The CDI has slightly less retard capability than the OE setup, & a very good spark, so any likelihood of kickback is made a certainty.
Most Parilla people will know about the huge amount of advance needed with the hicam (anywhere between 48 & 53 degrees BTDC I’ve seen quoted) & I think the odd (by modern standards) combustion chamber shape, & high crown piston, gives a very awkward shaped space for the charge to ignite easily at kicker cranking speeds too. Anyone who bumps a Moto Parilla hicam into life will know its a bit easier than kicking.
Why is this the case?
Well, I’m not entirely sure but I thought I’d better investigate when the CDI was fitted. I’d fitted one to a friends Morini single & it hardly needed a kick to bring it to life, the Parilla was now worse than ever!
Where to start?