Husaberg JBS 660 spec?
Posted: Mon Aug 29, 2016 9:23 pm
Anyone know what spec the Ballard big bore motors were? Bore x stroke, bearing mods etc
Many thanks
Many thanks
they are not all the same but at 660cc they should be 102mm bore (100mm was standard).
cast iron liner with many grooves to aid cooling
80mm stroke
long studs with nuts on top (as opposed to bolts)
the mains could be anything from standard roller at 16mm wide and a 12mm balancer still fitted
to
20mm bearing, no balancer and just an 8mm spacer
the mains are usually in steel sleeves that were bored and screwed in the original journal mouth.
they sometimes used the standard pork chop crank, sometimes it was manufactured, also they would use their own rod with it if indeed they had used it.
the JBS engineering may still have many photos of their work up still.
regards
Taffy