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Join Date: Nov 2007
Location: Chandler, Arizona
Sounds normal to me. No injectors on these bikes, just good old fashioned carbs. They are a bit hard to get to, but I'll take them over fuel injection any day. The Vulcan 750 engine is way to complicated for me, I like things simple, and this engine has about twice as many parts as it actually needs. But it is what it is, and runs great. But no way will I try to rebuild it, when mine wears out or has an internal mechanical failure, it is scrap. I love the old days when engines were simple, bearings were replaceable, cranks and cams could be reground for undersized bearings, cylinders could be rebored and larger pistons and rings installed, and valves and valve seats could be replaced. Looks like those days are gone forever.
The "Grambo trick" will tell you if there is a problem with the ACCTs, but will not fix it. The noise will come back. You can even turn the screw counterclockwise and tighten them, and make the noise go away temporarily. But either way, if the tensioners are worn out, the noise will come back. It comes back because the plungers (which is what you are turning with the little screwdriver) are able to back out when the soft aluminum threads in the tensioner body become worn. No fix is possible. You can replace the tensioners with new oem ones, and get 10,000-15,000 miles out of them, or you can replace them with TOC tensioners that will last for the life of the bike. You can also convert the ACCTs to manual tensioners. I did this on one of my old ones, but was not happy with it. It seemed a bit flimsy to me, and I decided not to use it. Many are using them, best of luck to them. But considering what a good engine is worth, and what the TOC tensioners cost, it was easily worth it to me. Those tensioners really take a beating from cam chain slap (which is normal in all bikes with cam chains) that is what wears out the threads inside the housings of the oem tensioners. I really like the solid steel TOC tensioners that are securely locked in place.
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
Last edited by VN750Rider/Jerry; 08-18-2013 at 12:31 AM.