slipping out of 2nd gear

[AyJay]

My bike always slipped out of second. It got worse and worse until at 50k it lunched the gearbox when it slipped out. And I mean lunched it. Stripped the teeth clean off 2nd.  Just depends how bad it is. I used to have it jump 3 out of 10 changes from 2nd to 3rd towards the end. If your's is just doing it occasionally, you've probably got another 20k before worrying too much though!



Thanks to the joys of YouTube, there's a very good look at the problem here, even though he's talking about the R1, the gearboxes share the majority of parts ..


2000 Yamaha YZF-R1 Engine Rebuild - Part 12


There are upgraded parts for 2nd and 6th gears with different serial numbers. They're the same serial numbers as for the R1


http://www.cheapcycleparts.com/oem-parts...ansmission
The problem is, although they're not expensive parts, the stripdown costs are.....


By the way, anyone got a spare gearbox?