I have 26,400 miles on my 2013 GT. My dealer had me wait until winter so they could use my bike for training since they hadn't had any other scooters with that many miles. The valves were within specs, no need to adjust. The drive chain needed replacement due to a kink in the chain (it could have gone farther with no issue of failure). The sprockets did not show any sign of wear. The dealer said that the chain is an o ring chain, so the oil bath doesn't lubricate it's internal bearings. The belt showed little wear and no cracks. They didn't replace the belt. They did replace the rollers in the clutch and the associated plate. The rollers were in backwards (as has been stated elsewhere in other forums) and were worn flat. They replaced the handlebar switches per a recall notice. The switches had not been a problem at all. The dealer said it looks like the GT could go another 24,000 without a major service. I do live in a rural area. Most of the miles were put on commuting 35 miles to work, most of which is open road. So the wear and tear of city driving could require more major service $. So far, so good. The dealer was gracious and didn't charge me labor this time around due to having the bike for an extended time and getting a chance for their mechanic to have a hands on experience with a bike as a whole piece instead of and 'engine assembly', etc. like the factory training. He said that the next time around will cost about $1600.
24,000 mile service info
- Thread starter Vago
- Start date
Xian Forbes
New member
Rollers can certainly be backwards. It has to do with the rotation. There is an inner and an outer component to the rollers (metal sleeve with plastic shell) that if placed incorrectly the tendency will be for the two to separate rather than to be held tight together. So it's not backwards, front to back, it's backwards right to left.
Skutorr
Active member
Uh, NO. The "rollers" DO NOT ROLL FREELY. They WEDGE themselves between the two variator halves and force them apart, moving in the SAME direction against both contact surfaces. They drag against the two variator halves sides, hence the "flat spotting" that occurs with ALL variator rollers. That leads to excessive wear on a VERY SMALL contact surface, i.e. round against a flat surface on one side...
That's the beauty of the Dr. Pulley Slider's design, it's FLAT on BOTH contact surfaces and slides, with dozens of times the actual contact area that is moving against the two variator halves on the stock "rollers". Also, it's made of a material that is designed to slide against metal surfaces without wearing, having been developed for use in industrial conveyor belts. That's why UNION MATERIAL in Taiwan invented them.
The SECOND advantage is the Dr. Pulley Slider's wedge shape allows the variator to ride even CLOSER together than OEM rollers at the start, and FURTHER apart at high speed, as it is not limited by the fixed diameter on an OEM roller. This lowers and then raises the effective gear ratios, giving you a faster take-off but lower rpm's at freeway speeds, all with stock roller weight values. With LIGHTER sliders you will haul BUTT off the line and midrange/passing, but have about the same rpms at high speed.
My otherwise stock Tmax500 dropped it's 0-60 time by almost 3 full seconds and my average trip mileage in the twisties, etc. went from 48 to 51 MPG. All for under $80.
Piaggio finally gave up using the disintegrating rollers in their 70 HP+ Gilera GP800, so in the same mechanicals they put in the Aprilia SRV850 they use DR. Pulley Sliders as OEM parts. Oh, and that SRV variator is a straight SWAP for the BMW one...
That's the beauty of the Dr. Pulley Slider's design, it's FLAT on BOTH contact surfaces and slides, with dozens of times the actual contact area that is moving against the two variator halves on the stock "rollers". Also, it's made of a material that is designed to slide against metal surfaces without wearing, having been developed for use in industrial conveyor belts. That's why UNION MATERIAL in Taiwan invented them.
The SECOND advantage is the Dr. Pulley Slider's wedge shape allows the variator to ride even CLOSER together than OEM rollers at the start, and FURTHER apart at high speed, as it is not limited by the fixed diameter on an OEM roller. This lowers and then raises the effective gear ratios, giving you a faster take-off but lower rpm's at freeway speeds, all with stock roller weight values. With LIGHTER sliders you will haul BUTT off the line and midrange/passing, but have about the same rpms at high speed.
My otherwise stock Tmax500 dropped it's 0-60 time by almost 3 full seconds and my average trip mileage in the twisties, etc. went from 48 to 51 MPG. All for under $80.
Piaggio finally gave up using the disintegrating rollers in their 70 HP+ Gilera GP800, so in the same mechanicals they put in the Aprilia SRV850 they use DR. Pulley Sliders as OEM parts. Oh, and that SRV variator is a straight SWAP for the BMW one...
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Skutorr, excellent explanation.
Not knowing that the previous owner had installed lighter weight rollers (than stock) in my Aprilla Scarabeo 500ie, at 10,000 miles I ordered and installed factory rollers.
The result was slower acceleration and slightly increased fuel mileage.
The next set of "rollers" will be lighter weight Dr Pully sliders.
Not knowing that the previous owner had installed lighter weight rollers (than stock) in my Aprilla Scarabeo 500ie, at 10,000 miles I ordered and installed factory rollers.
The result was slower acceleration and slightly increased fuel mileage.
The next set of "rollers" will be lighter weight Dr Pully sliders.
