2 Strokes Down Under

its a long shot

anyone know where to obtain some barrels/pistons for a mc18

have one in a sad state

Japan no problems. Pretty sure the 21/28 cylinder drop on. Pistons your spoiled for choice, any 54mm piston with a 15mm gudgeon and 22mm comp height goes up and down

ok
what about a workshop manual mc18 and a mc21?


also where to get some engine parts?

cheers in advance

HM31A wrote:ok
what about a workshop manual mc18 and a mc21?


also where to get some engine parts?

cheers in advance

NSR World

There is lots of parts in the engine you might have to narrow it down a bit.

engine parts i need is a top end rebuild kit for the mc18
tyga seem quite expensive here as there oem parts so was wonding ant good aftermarket pistons like prox etc

carby overhaul kit for the mc21

cheers

Aprilia RS125 piston is the basicaly the same except they stock size is 53.97mm. Most 54mm mxer pistons have a 22mm comp height, so they are all a chance. Nothing wrong with ProX.
Head gaskets should be available from honda. Is a pair on ebay.
http://www.ebay.com.au/itm/Honda-NSR-25 ... 5649ad03a2

Are MC21 and 28 carbs the same?

http://www.ebay.com.au/itm/Honda-NSR-25 ... 56415309a9

Are the Aprillia pistons any better than running stock Honda stuff?

21 and 28 carbs are different, don't know how much different though.

If you thought TYGA prices are horrendous, don't try and source them from a local importer!

I know someone who has some MC16 or MC18 parts lying around I can ask what he has (not a top end though).

The Aprilia pistons are the ones you can buy for not much money and they are readily available. They are the best pistons

2TInstitute wrote:The Aprilia pistons are the ones you can buy for not much money and they are readily available. They are the best pistons

ok
so what your saying are they a direct drop in replacement?

Check where the ring end gaps are, BUT stock size Rotax piston is 53.97 and runs 0.03mm clearence, Honda is 53.94 or 5 so use them on worn cylinders or hone to take off 0.01mm.
There are literaly 15 pistons you can use instead of the Honda.