Dr. Pulley 18×14 Sliding Roller Weights for 125/150cc 4-stroke GY6 engines.

Traditionally, gear ratio is changed by the up-and-down rolling movement of the roller weights in the ramp of the Moveable Drive Pulley (MDF).

Now the innovative Dr. Pulley Sliding Roller Weights slide up-and-down the ramp to change the gear ratio. This unique sliding movement (not rolling) provides exclusive advantages to increase CVT performance. With Dr. Pulley, no abnormal wear will occur even when running in high gear.

• Size: 18×14
• Set of 6
• Broadens your range of gear ratios
• Increases acceleration and re-acceleration properties
• Increases top end speed
• Lasts longer than standard roller weights
• U.S. Patent Number: 7,276,004

STOCK ROLLER WEIGHTS IN A STOCK BUGGY ARE 14g. OBVIOUSLY, RIDING STYLE, TERRAIN, RIDER WEIGHT, ENGINE MODS AND TIRE SIZE ARE ALL FACTORS THAT COME INTO PLAY WHEN TUNING THE TRANSMISSION/CLUTCHING ASPECTS OF YOUR BUGGY. TIME HAS PROVEN THAT THE MOST POPULAR SIZE WEIGHTS ARE BETWEEN 10-12g, BUT THERE IS NO FORMULA…….JUST PREFERENCE AND WHAT WORKS BEST FOR YOU.

WHEN TRYING TO CHOOSE WHAT SLIDE WEIGHT WORKS BEST FOR YOU, RULE OF THUMB IS A SLIDE WEIGHT GIVES THE EQUIVALENT EFFECT OF A ROLLER WEIGHT 2g  LIGHTER. SO FOR SAKE OF EXAMPLE IF YOU PREFER A 10g ROLLER AND WANT TO SWITCH TO A SLIDER, YOU WOULD WANT TO USE A 12g SLIDER.

WE STOCK 11g TO 14.5g SLIDERS BECAUSE THEY ARE THE RANGE THAT IS MOST ADVANTAGES TO BUGGIES.

BASICALLY EQUIVALENT TO THE RANGE OF 9g TO 12.5g IN ROLLER WEIGHTS.