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Join Date: Nov 2007
Location: Chandler, Arizona
I would remove the tank, and run it without the tank. Let it run till the fan comes on. that should build up normal operating pressure. With the tank off, you can pretty much see the whole cooling system and all the connections. I have had the elbow to the rear cylinder leak even with a new 0-ring. It's not a very solid connection. I just bumped that elbow while working on it with the engine running, and it sprung a leak.
I am a motorcyclist, NOT a biker.
1997 Vulcan 750, purchased about a week ago
2006 Sportster 1200 Low
2013 Royal Enfield Bullet 500, converted to carb
2001 Yamaha XT225, heavily modified
2004 Honda Rebel 250
1979 Vespa P200E
2002 Vulcan 750 parts bike
1994 Yamaha XT225 parts bike