My speedometer is 6% fast per my GPS. Is there any simple method of recalibration avaliable?
Merry Christmas everyone.

Simple? Nope.

Be grateful yours is so close, mine is off by a full 10%.

I don't have a GPS to guage my speedometer error with so... taking everyones' explanations into account, I just use my five MPH rule: If the sign says XX mph I just add 5 mph to the sign amount and call it even. I think for the most part that it still keeps me somewhat under legal speed limits. Of course, if I'm feelin' my oats, I go ahead and giv'er hell anyway.

I do the same - just add a few MPH (KPH's here).

I think it's fairly common knowledge that manufacturers factor in an allowance for inevitable inaccuracies in speedometers so they can't be blamed if riders and drivers inadvertently exceed speed-limits.

Mine is like Dicko's I think too. When going at interstate speeds mine is off right at 5 mph. If I'm doing over 90 mph than it is about 6-7 miles over. But I think all bikes have this error built into them.

At highway speeds my speedometer-to-GPS variance is 7-8 mph. But since i usually keep my GPS in the left glovebox, I just fallback on the old 'speed + 10' rule: Whatever the posted limit is, you can (usually) ride hassle-free with an additional 10mph on the speedometer. (Doesn't mean I don't ride faster - but the 'hassle-free' warm and fuzzies start to diminish.