speednuts
New member
How long do the Dr. Pulley Rollers last in the C 650 GT and what is the ideal weight to use?
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Dr Pulley rollers
- Thread starter speednuts
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Pappy13
Active member
I can't speak on how long they'll last, mine have only been in for about 14,000 miles. I believe the weight I used was 28gr.; a slight help from stopped, great mid range and a better top end without much loss of fuel economy. I gathered all my parts and tools, new belt, grease the Dr Puller rollers, brake parts and fluids and took care of it all at once, so I went from stock needing maintenance to new tires, brakes, belt, rollers,fluids flushed (brake and coolant), everything except the spark plugs, did those with the Idle air hoses. I can say I saw no noticeable wear while I was going through those cheap belts (2 belts in a little less than 5,000 miles) before I ordered the Mitsuboshi from Carpimoto. My gut tells me they should last 40 - 50,000 miles (clean them good when the belts are replaced).
Delray
Well-known member
"Dr. Pulley Rollers ... what is the ideal weight to use?"
On the 2013 GT I sold recently, I replaced OEM rollers with Dr. Pulley 28-gram sliders and variator pieces and experienced exactly what Pappy described: "A slight help from stopped, great mid-range and a better top end without much loss of fuel economy."
Gen 1.0 GT's (2012-2015) are noticeably slower off the line; BMW improved that for 2016+ models. I am presently debating whether to buy 28-gram sliders for the 2015 GT I just acquired, or wait until I change the CVT belt at 12,000 miles (which will probably be 15,000 miles based on experience with previous GT belts).
On the 2013 GT I sold recently, I replaced OEM rollers with Dr. Pulley 28-gram sliders and variator pieces and experienced exactly what Pappy described: "A slight help from stopped, great mid-range and a better top end without much loss of fuel economy."
Gen 1.0 GT's (2012-2015) are noticeably slower off the line; BMW improved that for 2016+ models. I am presently debating whether to buy 28-gram sliders for the 2015 GT I just acquired, or wait until I change the CVT belt at 12,000 miles (which will probably be 15,000 miles based on experience with previous GT belts).
Minister of Etc
Member
They'll last longer than you own the bike, I suspect, based on the anecdotes from long-term scooter owners on sites like ModernVespa.com.
28 Grams are what I installed in my 2014 Sport, and my experience of the bike's performance matches that of @Delray and @Pappy13 -- more oomph off the line, faster to highway speeds, and *maybe* 1-2 MPG worst fuel economy overall.
Don't forget the sliding pieces (SP3020-AH) to go with the sliders.
G'luck!