big end? or worse?

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fergusonforestry

Active Member
Posts
102
Location
scottish borders
lots of smoke from exhaust then lots of clattering/knocking, loss of power, also lots of smoke coming from oil filler, oil light started flickering (yes I checked oil before starting it was ok) :(
 
Worn out big ends or mains will give low oil pressure and knocking
 
it's the original engine as far as I know '87 had noticed it a bit smokey the last time I drove it but today went to collect a bike and made it about a mile it started getting really noisy and I had to turn round crawled back in 2nd belching smoke
 
lots of smoke from exhaust then lots of clattering/knocking, loss of power, also lots of smoke coming from oil filler, oil light started flickering (yes I checked oil before starting it was ok) :(

I'd suspect piston damage = noise and smoke. Shot big ends = noise but no smoke, ditto main bearings.
 
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