While I agree with Bubbie, the key thing here is research and decide...intuitively it makes sense to use the newer lube...but I would in my case because the Sporty has both primary, chain and clutch all in one and not the engine...heat is not the big thing nearly as much as higher torque and shear strength film. Added features like anti-foam is better, friction modifers are not (to me), convenience and cost then tips the scales.
On my Sporty HD a single quart of Formula + goes in, was using Spectrol Gold, but the local supplier stopped stocking it...so that is why. Money saved over the longer haul, means more to buy oil, battery and other consumables...JMO
On my Sporty HD a single quart of Formula + goes in, was using Spectrol Gold, but the local supplier stopped stocking it...so that is why. Money saved over the longer haul, means more to buy oil, battery and other consumables...JMO