Hi, everyone,

Picked up my 2009 YBR 250 from local dealers and noticed on way home a distinct but not very loud metallic vibration at between 3.5 and 5k revs., accompanied by an irregular knocking. It's not there when I take the bike through this rev range when it's not in gear. I can't go any higher up the rev range as the bike has only done 75 miles so needs running in. I suspect something's not right with the transmission. It still has dealer warranty so I'm not too worried. Anyone out there got any ideas? Do I need to take it back to the dealers?

I would Dan, you need to get it investigated.

Have you had it investigated yet? What was the result. Sounds like you bike has had a long stand and I believe that can cause something bad to happen to ball/roller bearings.