I have just put an advert on eBay for a Honda CB250RS kickstart lever but am mentioning it here as I got it off a TTR250 that I broke for spares so I know it will fit
The photo below shows the lever fitted to my TTR250. It's a very tight fit and touches the clutch case and frame - just - so be aware that it isn't a perfect replacement!
See http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=272581783718
If anyone on here would like it please PM me and I will cancel the eBay auction - £10 (including tracked courier cost within UK mainland)
The lever is shorter than the original TTR one so you get a much better kick action with it in that the engine turns over faster for less movement.