I recently purchased a well-restored BN1 but it has a lot of annoying vibration – especially around 2000 – 2200 rpm.
The manual implies that one cause might be:
When I blip the throttle, the engine doesn’t “rock” even a millimeter – so that seemed like a good place to have a look. There is a very robust mounting bracket attaching the exhaust pipe just below the manifold to the engine block. This is bracket allows for no movement whatsoever.
Should I loosen it so it “slops around” within the bracket and therefore allow some isolation from the engine?
I’m not sure how to interpret “Incorrect clearance for engine front mounting rubbers” or “incorrect adjustment of stabilizer” – i.e. what to look for or how to correct it.
Any help is much appreciated.
Thanks, Dave
The manual implies that one cause might be:
- Loose dynamo bolts
- Fan blades out of balance
- Incorrect clearance for engine front mounting rubbers
- exhaust pipe mountings too tight.
- incorrect adjustment of stabilizer
When I blip the throttle, the engine doesn’t “rock” even a millimeter – so that seemed like a good place to have a look. There is a very robust mounting bracket attaching the exhaust pipe just below the manifold to the engine block. This is bracket allows for no movement whatsoever.
Should I loosen it so it “slops around” within the bracket and therefore allow some isolation from the engine?
I’m not sure how to interpret “Incorrect clearance for engine front mounting rubbers” or “incorrect adjustment of stabilizer” – i.e. what to look for or how to correct it.
Any help is much appreciated.
Thanks, Dave