Hi again Max, new cranks and barrels are unavailable, unless you can find NOS, as of yet we haven't found anybody to rebuild the NF5 cranks, if you can find a bike with a good solid motor you shouldn't have any problems just with the occasional outing, I have owned my one for about 6 or 7 years now with no problems, admittedly I have a spare motor and lots of consumables plus a one or two used cranks and barrels, but what I will say is, I have had as much fun on my HRC kitted 21 as on the RS, more relaxed and less chance of being hurled into orbit.
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Proud Father of , 05 ktm 400exc supermoto 2018 honda crf rx supermoto