stock chain is 112 links but you are larger then a 42 in the back you might need a longer chain. Here is a little info on the difference.
What’s the difference between O-rings and EK’s Quadra-X Ring seals?
Both offer perfectly adequate sealing to contain the grease between the pins and bushings, and to keep contaminants out. But the disadvantage of O-rings versus non-sealed chains is increased friction, caused by the sideplates rubbing against the rubber seals. That’s why racers often opt for non-sealed chains, even though it means they have to replace their chains more frequently.
EK invented the O-ring chain for motorcycles back in 1974, but we’ve improved on our invention with the revolutionary Quadra-X Ring seal. The Quadra-X Ring reduces friction by as much as 40 percent, thanks to its smaller contact area. Yet it offers even better sealing than a conventional O-ring, because it has twice as many contact points between the ring and sideplates. It’s the optimal combination of maximum sealing protection with minimum friction. Bench tests show that EK Quadra-X Ring chains last 50 percent longer than standard O-ring chains.
If you are under 350 hp go with the EK ZVX if you are doing a lot of drag racing go with the ZZZ. Let me know if I can assist you further.