I've searched but can't seem to find a definite answer.... What's the pros and cons ? Is one better than the other, last longer? Make more/less power
Lee
The new UPD 77mm SC clutch style pulley is a breakthrough in power and performance for the M113K engines. We are now able to reach new power levels with an easy SC pulley change and still retain the clutch SC pulley feature.
Incorporates a custom duel bearing design, special tight tolerance...