Have to disagree with you fontyyy on this one. A competent dyno operator will jet your bike according to what conditions you will be riding in. Whether this is all year round road riding, track day, race etc, so you will have a safety margin that caters for each setup.

If you've no idea where to start, you could potentially seize your bike during your plug chop. Jo at Apex advised a mate to run 'C' needles on his mc28 after it felt a bit woolly on B's. It promptly ate itself 4 days later after only having been just run in. No blame being made, but it's the settings they were using on their bikes, which have no relation in my opinion to his.

It's not chasing top end numbers either, if you're conscious of your engines reliablity, as the figure you get will again depend on what kind of setup you require...

The strong point of using a dyno is that if jetted conservatively, although the load on the dyno is minimal, less than even on a longish race track straight, you could stay WOT on your favourite A road sound in the knowledge that it ain't going to pop.

I'm sure you'll dig out some 3 year old post where I've said you should only use plug chops and where you've worked for Erv Kanemoto or something, but it's my opinion and you've got yours obviously!
_________________
NSR300R - Why did i ever have a 250...