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Old 06-27-2013, 08:04 PM   #334
Joined: Oct 2007
Location: Western MD
Oddometer: 721
Originally Posted by woodly1069 View Post
Is there a possibility that the weights in the distributor are doing strange things causing the timing to advance and retard?
Yes, weak advance springs can cause this. So can worn teeth on the cam and distributor drive gears, too much end-play in the distributor shaft, worn bushings in the distributor and a worn cam thrust plate.

Unless the advance springs have been replaced recently, they're past due.
'69 Guzzi Ambassador,'77 Yamaha XT500,
'88 Ducati Paso, '91 ATK 604
'94 MZ Silver Star, '96 CCM 350
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