I've not seen an r2j mc18 sold for over £1000 for many a long year, but that may be about to change as there is a minter on Ebay right now up to £1850 reserve not met.
In my opinion that's a heck of a lot of money, maybe too much, you could have bought Watfordhorn's mc21sp for that, Richie Welsh's lovely '21se didn't go for much more and this (cw jollymoto pipes, sorted suspension and a fresh top end) was up for £1500 a while back.
Destricting the r2j is easy, just unplug a wire under the seat unit. That's it, 60bhp!
Should you buy a 3ma instead? Only you know that. Would I rather have a 3ma roadbike than a r2j? Yes, I would.
I keep watching them on Ebay and considering them myself, that parallel twin has got such a lovely sound to it.
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Please do not PM me technical questions, if you can't find it on the Forum start a thread