The thing is where I live there's a nice quiet 1 mile straight ("The Plug Chop Straight") that's flat for 2/3 of the run, then dips very slightly (nice to just boost the revs a bit more!) and finishes with a slight incline that's perfect for loading the motor up! You hit the 30mph speed limit sign just after you've rolled off and killed the ignition and roll into the bus stop! Perfect!
It gives a superb reading on the plugs, but I admit that for some that length of run can be rather intimidating. Regardless though, in my opinion you do need to run flat out for long enough to both clean and then "colour up" the plugs to get a good reading. 10 seconds sounds like a lot, but most standard bikes will need something approaching that kind of time just to get to peak RPM in 6th gear!
As Fontyyy says, a motor in 3rd or 4th won't be under anywhere near the same kind of load as one in 6th. Trailing the brake is OK I guess, but I doubt it will be very consistent. If it works for you though, then great.
Although they seem to be rather fuel inefficient, the MC18 motor seems to be quite efficient in its operation! Derestricting the ignition and airbox on an otherwise standard bike will generally not effect the jetting much, if at all. The MC18's tend to not need the airbox opening up quite as much as the '21 either.
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Andy.
NSR-WORLD.COM
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