I spent the afternoon of my Christmas last year stranded on the side of the road with a 'box full of neutrals and a bike that won't start. The bike started cutting-out as I was pulling-over, and from there, it never started again. Anyways, fast-forward to the present. I need some advice on how to deal with my broken CBR250RR. I think the gearbox has packed-it-in. The gearbox now seems to shift positively (with a click) when I downshift. But upshifting feels like mush and it doesn't click as it should when it engages the next gear. I can't verify what's happening with the gearbox, since the bike won't turn-over anyways. Has anyone done or paid for a gearbox rebuild for a CBR250RR, and if so, how much did it cost you? Depending on the cost, I will either fix it and sell it; or I'll EBay it as broken or as parts. I would appreciate it someone can advise me on what I should do next.