morning guys
i've just spotted some mc 18 carbs on ebay for £25 how would these babies run on a standard mc16,shame he hasnt got any cylinders!
cheers rob

Hi, you need the rubber that goes between the carbs and the crankcase as well - there is a post about it somewhere on this forum, plus there are some air feeds you need to either pipe up or block.

I put 18 carbs on my 16, it goes better with the bigger carbs.

Mat.

thanks for the info mat,i understand there are two types. ta20a and ta21a,i guess i need the earlier version ? thanks rob

It won't matter what carbs you use as you will need to re-jet/re-plumb them anyway!

TA20, TA21, TA22, (any MC18 or MC21 carb to keep it simple) take your pick!
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Andy.
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you say it goes better mat,how much better?am i gonna be giving myself a lot more grief doing this mod,i gotta k4 gsxr 750 for thatT cheers

Keep it stock then.
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Andy.
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thanks for your advice guys,why do we have to tinker?because we can i suppose!! rob

I raced an MC18 with MC16 motor for a while-till I could get some MC18 cylinders.
I had the 1989 MC18 carbs (open airbox), heads, full PGMII electrics and pipes on it.

Strangely, it went a lot faster...

Yes, if you get those carbs, you will have to rejet. On the bright side, the JHA MC21 jet-kit fits. It did on mine, at least.
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The Chopster

Was speaking to Brother StephenRC45 just a couple of days ago, and the 16 came into conversation.

Stephen knows the MC16 better than me and it would seem that by throwing MC18 or 21 carbs and insulator on you're only getting rid of half the problem. Stephen says that there's plenty of exhaust port work required to really make the 16 breath.

So it would seem that the plan would be to throw the 16 barrels in the bin, and fit 18/21/28 barrels and carbs and just get on with enjoying 'real' NSR power!

That's what he said anyway and who am I to argue.

Yeah but who listens to me

Andy, didnt we do a port map for the '16 overlayed with a '18 or have I been slack and we never did it?

If not we can do one in say about.... 8 days lol

The '16 exhaust port is almost the same shape as an '18 but has had it wings clips, Im sure if you're as knowledgeable as Matt you could port a '16 to the same spec but I think for most of us buying '18/21/28 barrels is easyer, and maybe alittle safer.
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If I have to take the carbs off once more...

We've only done MC18/MC21/300 maps and overlays Steve.

I would like to do a '16 map just for my own reference, if nothing else.

I have an MC18 Eric Gorr map here too somewhere, if only I could find it!!
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Andy.
NSR-WORLD.COM

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