• Welcome to the BMW Scooter Forums. Member registration disables ads and allows you to post and share. Register Here.

Dr. Pulley 36-gram Slider/Rollers

Dan_Lockwood

Member
Joined
Sep 5, 2024
Messages
35
Location
Clare MI
Visit site
Hi all,

I have a '20 C650 GT with 8,600 miles on it. I had purchased a few months ago a set of Dr. Pulley's 36-gram slider/rollers. I was told that for riding two up and both being on the heavier side, these would give me more mid and take off zip.

I had to pull off the right side anyway as it had been dropped, not skidded, on the right side. I bought a new right side lower running board for $300 and at that time purchased the belt everyone here is using, Mitsuboshi brand. I was also going to de-cat the converter, but since I'm going to be selling the scooter, I decided to just do the sliders, belt and new running board.

After a tear down and put back together I road tested the scooter and boy oh boy, it does chit and get quit well... BUT... it also does that at the cost of a couple thousand rpms at 65 mph. I pressed it a bit harder and got it up to just over 70 mph and it was WAY too many rpms for me. I decided to tear it all down again and put back in the perfectly good condition OEM rollers. After re-assembly, it road again just like before. When I compared the original belt with 8,600 miles it to the new belt, there was only .003" difference anywhere I measured the belts. Hardly enough wear to justify a new belt, but hey, it now has the new belt and a perfectly good spare to replace in another 15k miles.

Maybe a 3-gram or 4-gram light weight would have worked better, but as I'm selling it now, it's back to all original.

Anyone just scooting around town with a max speed of 60 to 65 mph for short bursts, these would be great. If anyone is interested in new Dr. Pulley 36-gram sliders, let me know... :)

If anyone is interested in a VERY CLEAN BMW C650 GT, here's the Michigan Marketplace ad link: 2020 BMW C650 GT I have a digital manual that I can send with the sale. There's the belt, sliders, Variator and converter BMW holding tool, Compuride 7" head display for Android Car and Apple Car Play along with JBL Cruise Bluetooth speakers. All of that can be removed in about half an hour to all original if needed.

I want thank everyone here for making me feel so welcomed... :)

Thanks again, Dan
 

Attachments

  • IMG_7993.webp
    IMG_7993.webp
    574.4 KB · Views: 9
36g is way too much drop from the stock 43g.
I found a happy point with Dr. Pulley's SR-series 42g rollers (non-round), because of their different shape the effect is exacerbated further.
Next time I might just go for the 43g SR (sliding rollers).
 
Back
Top