- Joined
- Jan 27, 2015
- Messages
- 64
I called Dave Coote as Richard suggested, regarding the issue. Dave suggested I check out the balance shaft bearing (the one way on the other side behind the oil pump)
I removed the oil pump, and made a special tool that engages with the balance shaft that is now accessible, so I could rotate it and listen for anything out of the ordinary. You can also use a large flat blade screwdriver.
I sprayed the bearing with brakeclean several times to remove any engine oil.
When I rotated the balance shaft there was a very loud growling sound, which I have captured on you tube video. Clearly the bearing has failed, this also explains the wear pattern on the primary gears.
[video]https://youtu.be/-6pU4A6E5dM[/video]
So assessing the situation, I have asked Norton to step up and provide a new bearing, gaskets and a set of new primary gears. My bike is out of warranty, so I am relying on Norton's good will to put this right.
I will have to remove the head, barrels, remove the gearbox and split the inner crankcase to replace this bearing. This can all be done with the engine still in the frame.
It is a pain to do this on a 2600mile bike, but it clearly is an Norton issue.
I removed the oil pump, and made a special tool that engages with the balance shaft that is now accessible, so I could rotate it and listen for anything out of the ordinary. You can also use a large flat blade screwdriver.
I sprayed the bearing with brakeclean several times to remove any engine oil.
When I rotated the balance shaft there was a very loud growling sound, which I have captured on you tube video. Clearly the bearing has failed, this also explains the wear pattern on the primary gears.
[video]https://youtu.be/-6pU4A6E5dM[/video]
So assessing the situation, I have asked Norton to step up and provide a new bearing, gaskets and a set of new primary gears. My bike is out of warranty, so I am relying on Norton's good will to put this right.
I will have to remove the head, barrels, remove the gearbox and split the inner crankcase to replace this bearing. This can all be done with the engine still in the frame.
It is a pain to do this on a 2600mile bike, but it clearly is an Norton issue.