Andy wrote:

JasonM wrote:
Great info and thanks for the quick reply Andy....a lot for me to think about

Gecko have an MC18 F3 crank for sale, I guess this wont fit without machining?

http://www.geckomotorcycles.co.uk/magento/parts/nsr-250/engine/mc18-hrc-honda-nsr250-f3-crank.html

Haha! Don't even go there! I don't mean "don't go to Gecko", Dan's a good bloke and has often sorted parts for me, I mean don't start trying to mess with HRC parts unless you're prepared to go the whole hog!

The crank needs the HRC cases, or the stock cases machined. You then need the correct stator and flywheel. Then you need the correct ECU. Then you need the HRC harness, and ideally HRC carbs... and on and on it goes! Oh, and it all needs to be the correct year, unless you really know what you're doing, and have all the resources at your disposal. Don't get me wrong, it's all doable, but it's far better to just get a good stocker and tune it a bit! 65rwhp and perfect tractability is easily attainable.