Your title is misleading! Fitting MC16 electrics/electronics to an MC18 would be a step backwards, but fitting an MC18 motor to an MC16 would be an upgrade.

Anyway, the motor doesn't care what system you use to run it... it's "dumb". However, the MC18 flywheel and the port timing will be compromised.

The MC16 harness will almost certainly NOT connect directly to the terminals on the MC18 stator and pulser coils (flywheel pick-ups), but there is nothing to stop you splicing in the MC16 ones onto the MC18 components.

There is no reason you can't make it work... other than the MC18 motor isn't going to fit your MC16 very easily! The MC16 motor is solidly mounted like the HRC RS's, whereas the 1988 motors onwards are all rubber mounted. You will need to turn up some spacers and press them into the MC18 crank cases.

Again, no reason why, with a little patience, it can't be made to work.

A normal* MC16 motor will never really make much more than low 50's hp, due to it's internal configuration and electronics, but an MC18 motor has the potential to make 61~62hp, in completely standard trim. You should be able to realise most of the 60+hp in your MC16 chassis, but not all of it. To attain maximum performance you will need the MC18 electronics, expansion chambers, and probably carbs**, which are all oprimised to the MC18 motor's configuration.

You will probably find a 1988 MC18 R2/4J motor is more compatible with the MC16 systems than a 1989 motor. The 1988 flywheel is also the same size as the MC16.

* HRC TT-F3 NSR250RK MC16 is rated at 68ps.
** HRC TT-F3 NSR250RK MC16 runs 28mm carbs.

ALL this has been covered on the forum before. Please try searching the forum first in future, before simply "bumping" a topic because you don't get a response within the first day or two.
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Andy.
NSR-WORLD.COM

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