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Join Date: Nov 2007
Location: Chandler, Arizona
First, the marble thing does work, but you will be a lot better off just getting rid of the entire air injection system, and capping off the connections at the head, either with coasters, which look nicer, or like I did, with rubber plugs. Your bike will not only run better, but you will get rid of a WHOLE BUNCH of useless junk that clutters up the bike. It made me feel real good to throw mine in the trash can.
The "Grambo trick" is more of a diagnostic tool than a fix. If doing it quietens your engine down noticeably, then you have worn out cam chain tensioners. The noise will come back. A variation on this is to actually turn the screw counterclockwise, which advances the plunger and stops the noise. But just like the Grambo trick, it will come back. I highly recommend the TOC manual tensioners. I have been using them for over 40,000 miles, and their quality is like night and day over the cheesy oem tensioners.
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