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: I have a 1979 P-200E completely stock that runs just fine but after it has been running for about a half hour begins to ping going up any kind of a grade. This doesn't affect it's performance at all but the noise is unnurving. I use ninety four octane gas in this scooter if that helps. Also the scooter is completely stock and has never been rebuilt. It has four thousand miles on it. I have removed the head over the winter and there is no build up of carbon? Any help would be appreciated.

Check your timing.. 94 oct is way overkill for a stock (right) scooter. I would go down to 86 octane and see if I could get it to run ok with that. My bike runs >10:1 and I use the lowest octane I can get.

• P-200 that pings francois (132.204.82.131) 12:01:36 5/31/2000 (0)