GP100 Alarming Whirrring noise

[MattWadz]

Okay, my bike has developed an alarming whirring noise. it is there on idle, but very quiet and when i revv, coming back down the rpm's its whirring. im not sure why this has started happening, and i doubt its anything massive as the engine still works perfectly fine, and the clutch works well too. it developed the fault today, but yesterday 2 screws came out of my clutch side casing, and when i pulled the clutch it was moving away from the engine, i bolted it back on and it worked fine, but today this noise has occured, il pop the casing off tommorow and have a look inside, but any ideas of what this could be from?

Thanks for reading

Matt

____________________
Pitbike x2, Mini Moto x4, China Quad, 02' Suzuki AP50 > 03' MBK Nitro > 86' Suzuki GP100 > 02' Yamaha Jog R > 57' Honda Lead 100 > 95' Piaggio ZIP Rst 50 > 51' Suzuki TS50x > 83' Honda CB125TDE Twin > 51' Yamaha Aerox > 98' Kawasaki KX60 > 89' Yamaha DT50MX > 80's Honda QR50 > 05' CG clone > 125cc China Pitbike > 91' Honda MTX125 RW-L > 09' Peugeot Speedfight 2 LC LR > Lucky MX 140cc > Apache Tomahawk 50 Quad (current = 2010 Yamaha WR125R

[MattWadz]

also ive noticed the bike seems to be alot more smoky, 2 stroke though so its not piston rings.
____________________
Pitbike x2, Mini Moto x4, China Quad, 02' Suzuki AP50 > 03' MBK Nitro > 86' Suzuki GP100 > 02' Yamaha Jog R > 57' Honda Lead 100 > 95' Piaggio ZIP Rst 50 > 51' Suzuki TS50x > 83' Honda CB125TDE Twin > 51' Yamaha Aerox > 98' Kawasaki KX60 > 89' Yamaha DT50MX > 80's Honda QR50 > 05' CG clone > 125cc China Pitbike > 91' Honda MTX125 RW-L > 09' Peugeot Speedfight 2 LC LR > Lucky MX 140cc > Apache Tomahawk 50 Quad (current = 2010 Yamaha WR125R

[RPM]

Hello

It might be worth checking that a section of gasket hasn't become dislodged if any bolts were loosened, which is being caught by a moving part of the engine.

I have seen this happen on a bike after it's casings had been (hastily) put together by the mechanic. It was annoying but cheap to correct

All the best
Mike

[Pete.]

Sounds like you have a main bearing on the way out. Take both engine covers off and see how much the crank moves up and down.
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good