Scary moment

Ok, now my bike has always had a noisy transmission, it’s a sort of whine? When I first got the bike as I was rounding a slow corner I heard a rattling noise and felt a bang through the gear lever? It never happened again so I (foolishly) forgot about it. Shortly afterwards I was changing the final drive oil and as I was turning the real wheel by hand the whole thing locked up! I wiggled the wheel back and forth and it freed up but the final drive box felt rough so I changed it for a good used one and never had any more problems apart from the slightly noisy transmission. Coming home from a ride out tonight it happened again, it sounded like I was in between gears (that rattle you get when you miss a gear change) and again I felt a kick through the gear lever. As I was in third gear and wasn’t changing gear it wasn’t a missed gear. I pulled over and in neutral rocked the bike back and forward but she felt ok? I carried on the remaining few miles home and she was back to normal slightly noisy as usual. Any ideas guys?

Couple of things come to mind here.
What you're describing sounds like the result of a bent shifter fork. What happens is that you're in a gear and the bent shifter fork is holding another cog gear just off of engagement and a little play in the gear box and that gear is now attempting to engage but the gear you're in is driving the bike. 2 gears can't mesh at the same time so Bang !!
Another unusual recall I have is that someone on this site was doing a total rebuild and had split the engine and came across a grenaded secondary shaft bearing (just in front of the clutch basket I believe). For some reason I think it was StanG who was doing the work???

Bottom line- As much as I hate to say it, time to pull the engine and split it. Whining is not good. Banging even worse. There have been a couple of guys on the site that did this job with no previous experience and had successful outcomes. In for a penny, in for a pound I say. We're here to help.

KB
Post Script- Found it - It was KZA13 who posted the story   Oil Pump Pickup Screen Topic

PaulD, that sucks. Out of curiosity, did you shift any differently when the bank occurred? Maybe not a complete positive shift? Different RPM band? 

Have you looked for metal particles in engine/trans oil?  

Sigh.

 

dcarver220b wrote:

PaulD, that sucks. Out of curiosity, did you shift any differently when the bank occurred? Maybe not a complete positive shift? Different RPM band? 

Have you looked for metal particles in engine/trans oil?  

Sigh.

I wasn’t changing gear at the time and the last oil change I did was less than a 1000 mile ago and there was no sign of metal particles in the oil or filter?

If you do have to rebuild, lots of good info and pics here .. At least you'll know what you're getting into...