Complex sentence: While others used a 90mm-plus piston with a very short stroke of 60mm, KTM used an 89mm x 64mm configuration which provided more torque at the expense of higher RPM's.
Split into simpler sentences: While others used a 90mm-plus piston with a very short stroke of 60mm, KTM used an 89mm x 64mm configuration. This provided more torque at the expense of higher RPM's.