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The chain on my knucklehead has what the service manuals always described as a 'tight' spot and a corresponding 'loose' spot. As anyone with and any sense knows, the link distances in newly manufactured chains is both accurate and consistent. These 'tight' and 'loose' spots are the result of the chain sprocket running eccentrically to the brake drum lug pattern in the wheel hub. In pronounced situations, this can affect the machine's braking ability and on this this particular drum the eccentricity is quite pronounced. In fact, The drum is so eccentric that I can't get the shoes centralized such that both are in contact with the drum when the brake is applied. This lead to some 'interesting' traffic stops, especially then the one operating shoe gets a little hot. Not good at all. After identifying the problem as the (OEM) drum only, I replaced it with a new, popular aftermarket drum. Same problem, but not as pronounced.
With the later cast iron drums, the drum could be cut thereby limiting the eccentricity to the sprocket only and not the shoe-to-drum radius. However, one must be careful when cutting the earlier, thinner mechanical drums.
My questions is how do you (or even CAN you) get the brake shoes to equally purchase against the brake drum given this condition? Also, with Hebron approaching, I'm thinking of purchasing one of V-Twin's complete Backing Plate/Drum assemblies for temporary use hoping that as an assembly it would run true. But, but I'm a little skeptical - especially when it comes to stopping these old bones!. Before I spend the money I must ask; Has anyone had experience with V-Twin P/N 23-0876??
With the later cast iron drums, the drum could be cut thereby limiting the eccentricity to the sprocket only and not the shoe-to-drum radius. However, one must be careful when cutting the earlier, thinner mechanical drums.
My questions is how do you (or even CAN you) get the brake shoes to equally purchase against the brake drum given this condition? Also, with Hebron approaching, I'm thinking of purchasing one of V-Twin's complete Backing Plate/Drum assemblies for temporary use hoping that as an assembly it would run true. But, but I'm a little skeptical - especially when it comes to stopping these old bones!. Before I spend the money I must ask; Has anyone had experience with V-Twin P/N 23-0876??
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