Surely the point of shaving the spacers instead of the swing arm is they are a shit load cheaper to replace if any mistakes are made, not only that but an unmolested swingarm will have a higher resale value than a shaved one!
I agree. However I may have misunderstood Wraith600 as I read it that he shaved down the spacers that are PART of the frame, not the loose spacers. So that's a big job and expensive too.
Whilst I would rather not cut down the swing arm, it is a necessity as it is 10mm too wide to fit between the frame. So either the swing arm or frame is altered, I can't see how you could achieve it with just different spacers. However I'm happy to be proved wrong and that's why I'm asking the questions, so I can use the easiest solution. My plan is to replace the existing roller bearings with new ones with a smaller inside diameter so I can use the Fazer spindle without resorting to spacers.
Altering the swing arm is not that big a deal as it only cost me £25 and once the build is done the bike will have been heavily modified anyway and it wouldn't be possible to put it back to standard without a lot of work. Plus I have an additional sacrificial one to test on first.