Hallo everyone, I am building a MC18 R2 and new to the group What and from.what I've seen, the knowledge in this group is awesome so I am really happy I found it. I will be tapping in alot over the next few months as I finish my project. I need a bit of help, I believe there is a difference between the MC18 R2 and R5 airbox. Could somebody please tell me what to look for or what the difference is as I do not have one at the moment and am looking to buy but do not want to buy the wrong one? Thanks Troy.

Hi,

Although I am not 100% sure but I think the only difference is with the white air correction diagram/sticker which is on the top of the air box lid.

The R2J/4J models have one air solenoid whereas the 89 year mc18’s have two air solenoids.

The air connecting tubes are the same for 88 and 89 year.

One like this - however this one has one of the rubber carb joints missing

https://www.jauce.com/auction/p1033581964

Thanks for the replys and the pic..Wayne if it is just the sticker (which I am hoping it is) that's fine as the spares shop I contacted said he has about 10 MC18 boxes but is not sure of any difference and cannot tell the R5 from the R2. Unfortunately the shop is on the other side of the country so I could not just pop in and check them, if they are all the same I can just purchase one and get him to ship it to me as I'm not too phased about the solonoid sticker.