Originally Posted by Gryphon12
New Duke 390 has extensive use of alloy, including light wheels & brakes (unsprung weight), and as a thumper weighs 324 lbs. wet. The new Ninja 300R twin doesn't have these advantages and weighs 378 lbs. wet. It would take a pretty high-tech (I want one!) 500 Twin to hold the weight down to 350 lbs. wet. Another reference point: The 2012 (higher-tech) Duke 690 thumper weighs 352 lbs. wet.
Well, wet weight is +20 lbs most often!
Lets call it 378 like the Ninja 300 and it shouldn't be a Herculean undertaking. I think the Kawi guys use lead in their parts in the cheapo bins!