Well my bike is different then yours, but here's what I use . I use 20/50 wt in the motor, and I ride all winter. You'll never have a problem starting as long as your battery is hot. I keep mine on a tender whenever it's in the garage. I use Rotella t triple protection 15/40 in the primary(clutch) and it shifts fine all thru the oci. I'm sure 10w40 wt would work just as well, but I use the 15/40 for other machines so it's always on hand. I use 75/90 wt gear oil in the trans all year round and it keeps the trans quite and shifts smooth, I've used these wt oils since I got the bike, and it's getting close to 75k miles. Find a brand you like that's easy to get and in your price range and stick with it. Every brand out there claims to be the best, buying what works for you saves, time and money and disappointment when you realize every oil doesn't work the best in every vehicle.,,,