Quote Originally Posted by LMsports
Dyno a bike, then put chain lube on it. Check results...


What you will find is horsepower numbers are actually higher with a lubed chain. How long this effect lasts, not tested by me. But I always lube my o-ring chain. Cheap horsepower.
Like Rob said, free horsepower if you look after and lube your chain properly. I used to see 3-4 hp by changing a worn out chain for a new one on customer's bikes. A worn dry chain also has more chance of breaking and destroying cases, just like an improperly installed rivet link.

Friction robs horsepower. Another thing I used to do, is if possible, is lube the chain when its hot as it will reduce the 'lube fling' as the lube will set a little. Motocross trick from back in the day :wink: