Dr. Pulley 25x15 sliding roller weights set of 8 — size 2515 stamped Dr. Pulley 25x15 sliding roller weights set of 8 — size 2515 stamped
Dr. Pulley 25x15 sliding roller weights 15g in clear plastic storage case, labeled Dr. Pulley 25x15 sliding roller weights 15g in clear plastic storage case, labeled
Dr. Pulley slider feature sheet — sliding vs. rolling mechanism comparison, CVT performance advantages, U.S. Patent 7,276,004 Dr. Pulley slider feature sheet — sliding vs. rolling mechanism comparison, CVT performance advantages, U.S. Patent 7,276,004
Dr. Pulley roller weight selection guide — heavier weight = higher top speed, CVT slider Dr. Pulley roller weight selection guide — heavier weight = higher top speed, CVT slider
Dr. Pulley roller weight selection guide — lighter weight = faster acceleration Dr. Pulley roller weight selection guide — lighter weight = faster acceleration
Dr. Pulley 25x15 sliding roller weights set of 8 — size 2515 stamped
Dr. Pulley 25x15 sliding roller weights 15g in clear plastic storage case, labeled
Dr. Pulley slider feature sheet — sliding vs. rolling mechanism comparison, CVT performance advantages, U.S. Patent 7,276,004
Dr. Pulley roller weight selection guide — heavier weight = higher top speed, CVT slider
Dr. Pulley roller weight selection guide — lighter weight = faster acceleration

Dr. Pulley

Dr. Pulley 25x15 Sliding Roller Weights Yamaha & Kymco 8pk

SKU 169-344 14G
$70.00
Shipping calculated at checkout.
Options: 14G
Description

Standard round rollers roll. Dr. Pulley Sliders slide. This patented design allows your variator to open further and close faster, broadening your gear ratio for faster acceleration and higher top speed — without the premature wear of traditional round weights. Available in 13g, 14g, and 15g to suit your riding style.

Performance Benefits

  • Faster Acceleration: Sliders reach the bottom of the ramp faster for immediate throttle response off the line.
  • Increased Top Speed: The unique shape allows the pulley to close further, pushing the belt higher for maximum velocity.
  • Extended Service Life: Self-lubricating PA46 tribological composite lasts 18% longer than standard weights with 22% less material loss.
  • Anti-Wear Design: Eliminates abnormal wear / flat-spotting even during extended high-RPM operation.

Specifications

  • Size: 25mm x 15mm
  • Quantity: Set of 8
  • Available Weights: 13g, 14g, 15g
  • Material: Oilless PA46 Tribological Composite
  • U.S. Patent: 7,276,004
  • SKU: 169-344

Compatibility

Brand Compatible Models
Yamaha Majesty 400, T-Max 500/530/560, Morphous 250/400
Kymco AK550 (4T LC), Xciting 400/500
Peugeot Metropolis 400
SYM Maxsym 400/600i

Tuning tip: For more acceleration, choose a weight 10–15% lighter than stock. For more top speed, match your factory roller weight. Orientation is critical — ensure the Dr. Pulley logo faces the correct direction during installation.
Product Diagrams
Features
  • Patented sliding mechanism for broader gear ratio
  • Faster acceleration and higher top speed vs. round rollers
  • Self-lubricating PA46 tribological composite
  • Anti-flip design prevents abnormal wear
  • 18% longer service life than standard weights
  • U.S. Patent 7,276,004
Specifications

Size: 25x15mm | Quantity: 8 | Weights: 13g, 14g, 15g | Material: Oilless PA46 Tribological Composite | Patent: 7,276,004 | SKU: 169-344
Model Fitments

Yamaha Majesty 400, T-Max 500/530/560, Morphous 250/400 | Kymco AK550 (4T LC), Xciting 400/500 | Peugeot Metropolis 400 | SYM Maxsym 400/600i
  • Same day shipping for orders placed before 2PM (CST) M-F
  • 30-day return period on eligible items
  • Flat-rate shipping for orders shipped to the 48 Contiguous United States.
Options: 14G
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