I've only got one thing to say here, why the hell didn't this bike come from the factory like this?????
So I did the 31T pulley from a Stryker. Yea, it helped a little, but when I'm on the interstate here in Floriduh there's times when 80 mph is called for over an extended range. The 950 engine's peppy enough but the gearing limits the comfort zone of that speed by making the bike way too busy feeling right about 75 with the OEM gearing, and about 78 with the 31T.
While I was at the folk's house over Thanksgiving I killed some electrons by searching for options. Turns out, Yamaha Raider's come with a 66T rear pulley. Even if it would fit, the cheapest one I can find on eBay is over $200. BUT, there's some Raider fans going with the Harley 70T pulley for some more torque. It's an easy swap apparently, just drill the pulley stud holes out to 31/64" and you're on your way. They even use the 1.5" pulley width with no mods. HD Part number 40315-94, 94-99 Softail and a few others from the mid 90's.
Now, if the 66T Raider pulley would fit on my 950, and a Harley pulley fits on the Raider cush drive hub, maybe the 65T Harley pulley I have in my garage will fit on my 950???
Like magic AF!!! Studs line up, just drill them out a snatch-hair with the 31/64", bolt it up to the cush drive hub, and install as normal. I even measured the exact distance off the bench from the bottom of the cush drive to the outer edge of the pulley and it's exactly the same as the 70T OEM pulley (3.75") so that tells me alignment will not be an issue.
Now the best part, because I changed the ratio at the opposite end of the speed sensor my speedo is back to dead-nuts accurate!
GPS confirmed, maybe 1 mph cold at 80.
The only potential issue I can see 950 owners running into here is the belt length. See how far back my adjuster went? There wasn't much more, and maybe the 156T OEM belt would be too long, especially if you stick with the 30T front pulley. In that regard, the 30T would probably show your speed SLOWER than actual.
80 right now feels smooth as buttah! Like 72 used to. Sure there's a bit less powah for the roll-ons but she still goes, and holds it just fine. Nowhere near as bad as a full dress HD bagger from the mid 00's and that pitful 88" Twin Cam... And honestly, who actually needs to boil the tires under acceleration when you're already going 80?