No ive just had some bad luck, she's goes like a rocket, but something has broken a ring, and after the repair, it happened again so i think it needs futher investigation!!!!!, The NSR's are quite reliable but it is a 2 stroke and it is a few years old now!! so things do wear!

Its only the stem you need, A few people here use the stem from the NSR and fit a NC35 upsidedown from end, The hard bit i guess is finding someone who can swap the stems over as its a press fit, and small weld!