The MC18 frame is considerably narrower than the MC21/MC28. Most things can be made to "fit" something else, but not necessarily fit well or look right!

I've seen MC21 bodywork on an MC16 that looked like some kind of schoolkid's bad Transformers project, and I've seen an MC21 with an MC18 fairing stretched over it that actually worked really well! There are better options than trying to bodge the wrong bodywork up though in my opinion.
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Andy.
NSR-WORLD.COM

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