For my BJ8, we had an 'old fart' at an engine builder's shop balance the
drums; he welded quarter-inch iron rod lengthwise between the fins (no
metal removed).
I don't recall if we had the BN2's drums balanced, but there is a large,
thick rib near the outer edge that had chunks cleanly machined off; it
appears this would have been done at the factory.
Bob
On 2/20/2018 1:14 AM, A H List wrote:
> Drums are statically out of balance, i.e. there is more metal on one
> side due to casting/machining tolerances. To correct this only
> requires basic tools like a file and some patience, or take them to an
> engine balancer. I prefer to file a small amount over a large area so
> they don't look any different to originally whereas jobbing shops may
> use a drill to remove metal and it won't look original if that
> matters.
>
> Andy.
>
>
> On 2/20/18, Keith Pennell <llennep at verizon.net> wrote:
>> I did not understand that the drums were shaved, but the tires. Shaving
>> drums merely makes it round around some point and nt necessarily the center
>> of mass.
>>
>>
>>
|