o0norton0o
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- Joined
- Apr 27, 2015
- Messages
- 1,950
I've owned my norton since I was 19 years old, when widespread knowlege of adding a reed valve breather to the crankcase was not well known. Maybe some really smart people did this on their bikes, but as I recall bike rebuilders considered it a badge of honor to rebuild a parallel twin of any brand without having leaks... My bike always had some amount of leakage prior to adding a reed valve breather. It's fair to say that the design of the commando is greatly improved by the addition of a reed valve to deal with crankcase pressure causing oil leaks.
IF you drilled any holes into the crankcase from the timing side, I would suggest cleaning the screen in the sump, run the bike for 5 minutes, then change the oil (clean the sump screen again) then take it for a 20 minute ride and change the oil YET again. Even with a vacuum pulling chips away from your drill, you will get some aluminum flakes and dust entering your crankcase. After your second oil change, run the bike and inspect the oil for metalic appearance... If you have any doubts, change it again!@
IF you drilled any holes into the crankcase from the timing side, I would suggest cleaning the screen in the sump, run the bike for 5 minutes, then change the oil (clean the sump screen again) then take it for a 20 minute ride and change the oil YET again. Even with a vacuum pulling chips away from your drill, you will get some aluminum flakes and dust entering your crankcase. After your second oil change, run the bike and inspect the oil for metalic appearance... If you have any doubts, change it again!@