Guys

My MC21 has an MC18 alternator with pickups. But i don't know if the flywheel is the original MC21, how can i tell?

Also i have found the MC21 alternator and pickups, In case my flywheel is MC18 can i use it with the MC21 alternator and pickups with mc18 Flywheel?

Thanks
James

not 100% sure but you can have a look at the on-line parts manual and compare part numbers

Thanks Fenton

It shows that MC18 is 31110-KV3-701 where as MC21 31110-KV3-813

Would that be the same? or the last 3 digits is just the serries of the Flywheel?

James

There are 2 types of '18 fly wheel. The'88 R2j used a larger fly wheel than the later '89 R5k and therefore uses a shorter pickup.

The r5k fly wheel though uses the same pick ups as the MC21 and the same dia flywheel but with different ign timming.
_________________
If I have to take the carbs off once more...

have a look here parts codes

Thanks stephen

Therefore will consider finding an MC21 flywheel.

If i leave the mc18 flywheel, startor and pickups on the mc21 will it hurt the engine? is the timing more advance or less?

James

Thanks Fenton

XXXXX-XXX-000 last three digits indicate various suppliers or improvements on the part. So i assume that the 2 parts MC18 MC21 flywheels are interchangeable. It looks like it is. BUT....

Can someone else confirm me this ? don't want to spend more money on flywheel i wont use.

James

The '89 MC18 fly wheel is slighty retarded compaired to the Mc21....

However the MC18 runs a shorter barrel and different head volume compaired to the '21 so I would say its safe to fit a '18 fly wheel on a '21 but not a '21 one to a '18 unless you know what your doing.
_________________
If I have to take the carbs off once more...