It will probably get missed as most people just glance through posts so thought I would start a new post. I have done a search but nothing has come up.

Got my hands on an mc16, the barrels on there are marked T1 28 at the bottom on a round marking. Concidering the age of the bike I was wondering if someone previous has done a barrel swap? Have I got mc28 barrels?

Are they round (MC21/MC28) or hexagonal (MC16/MC18) in shape?

Do the heads each have a take-off on top of the main coolant hose union, with a small-bore (about 5mm ID) hose attached? This would almost certainly signify MC16, although MC18 heads bolt straight on to '18 cylinders.

I very much doubt someone will have fitted MC28 barrels and heads to an MC16.
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Andy.
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I thought they looked round, I will have another look tomorow and take a quick pic. I just got a little exited when I saw 28 on them.
Suppose it wouldent make that much difference as I could port them myself but would save a little work, not sure what the port map is like on the 16 but I did see the 21 port map in the tuning section.

Think im going to keep the 16 and do a rolling rebuild, will have to be like that as im a little un'employed at the moment

MC16 exhaust ports are tiny, so there`s huge scope for improvement. See if you can buy up an old knackered MC18 barrel and copy the porting.
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Vampire?

Just thought I would update, the barrels do look hexaganel. Quick pic just incase anyone can tell me what ones I have.

Look like standard ones to me mate!
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More **** two strokes than you can shake a **** stick at.

Chears fella, I gess I got alot of porting to do

Lets see how much I can get out of a standard modded motor.

Just another quick one, since knowone wants the standard mc16 barrels how much do they go for?

Never bothered selling any myself so dunno! '18 ones go for £150 ish with pistons and ready to go
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More **** two strokes than you can shake a **** stick at.

I would gess then for a set mc16 of pistons and barrels that knowone wants about £40 tops....

Just a thought on having a spare set to port, build my own pipes, 28mm carbs should be good for around mid 65hp.