| Simon which Alloy arm did you get, there are three different ones that I know of to fit the 20mm spidle on the back of the engine. I'll rule out it being the latest one, making it either the early one with the adjusters inside the swing arm and the adjusting bolts sticking out of the end plates as they did on the steel swinger or the more common alloy arm found on most 900SS's with the adjuster blocks on the outside pressed up against the adjusting bolts
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