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View Full Version : Refuses to run on rear cylinder help


COTTY
05-12-15, 05:35 PM
Hello I have a early sv that will not run on the rear cylinder .i have done a compression check and its the same as the front.i removed the head and all valves seem to be ok.i have also changed the carbs but it still oils up the plug and wont start unless I warm the plug.help

Red Herring
06-12-15, 09:04 PM
Is it starting on both cylinders when you warm the plug or just the one? i.e.: does it run on the rear cylinder at all?

Biker Biggles
07-12-15, 04:05 PM
Is there a spark at the rear plug?Are you sure it is oiling up or could it be fouling with unburnt fuel?If its oil it must be coming down the valve guides or via worn piston rings/bores.Fuel fouling could be flooding carb or no spark.I assume you already checked all this before taking the lid off.

Red ones
07-12-15, 04:08 PM
Have you checked the coils?

Tigerjohn
07-12-15, 08:15 PM
+1 If plug is OK, I would also suspect coil or a leak between coil and plugs.