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Mini Quad Performance
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Yamaha ATV Performance
  Big Bore Cylinder Kits
  Big Bore Pistons, Cylinders & Kits to make your mini grow a little. 50cc to 70cc & 90cc to 110cc. Fit the following models unless otherwise specified. Kasea Skyhawk 50/90, DRR 50/90, Ram 50/90, Polaris Predator 90, Polaris Sportsman 50/90, Polaris Scrambler 50/90, Dinli, Alpha Sports 50/90, Sunray 50/90, Kymco, LRX 50/90, Blast 50/90, Jehm Products, Extreme Machine, Bombardier 2 Strokes, ETON Viper, Unison 50/90 & Arctic Cat 50/90.  
Quantity Item / Item Code Price
Big Bore Cylinder Kits
Big Bore Cylinder Kits
$199.95
$169.95

50cc to 70cc Big Bore Steel Cylinder Kit
50cc to 70cc Big Bore Steel Cylinder Kit. Includes cylinder-piston-rings-clips & gaskets. Everything you need to get back to riding. *Jetting required.  -  ET811.091
$199.95
$189.95

50cc to 70cc Aluminum Cylinder Big Bore Kits
50cc to 70cc Aluminum Cylinder Big Bore Cylinder Kit. Cylinder Kit - Includes head-cylinder-piston-rings-clips-gaskets. Aluminum cylinder with Nikasil liner. 8 port cylindrer with bridged exhaust. Cylinder weight is 60% lighter than stock. Everything you need to get back to riding. *Jetting required.  -  632.946A
$229.95
$199.95

110cc Big Bore Kit - 53mm
110cc Big Bore Steel Cylinder Kit. 53mm. 90cc to 110cc Cylinder Kit - Includes cylinder-piston-pin-rings-clips-gaskets. Must reuse stock cylinder head. Everything you need to get back to riding.  -  PTI-05-650-00
$199.95
$169.95

110cc Ported Big Bore Cylinder Kit
This ported Cylinder Kit will add even more power than you would expect. This is a stage one ported cylinder, adds 40% horsepower increase over stock. Runs 93 octane fuel. RECOMMENDATIONS For Best Performance Use With: Hi Rev or Torque Exhaust Pipe, High Rev C.D.I LMS Matched Clutch Kit, 21mm carb, Pod Filter, Outerwear, Oil Injector Eliminator Kit. Ported 54mm 90cc to 110cc Cylinder Kit - Includes Head, PORTED cylinder, piston, rings, clips, gaskets & jet. Everything you need to get back to riding. PLEASE ALLOW 2-3 WEEKS FOR DELIVERY -  PTI-05-650-PORT
$369.95
$359.95

52mm Ported Cylinder Kits
52mm Ported Cylinder Kit. 89cc with 42mm stroke. AMA legal. 30% power increase over stock. Comes with High Compression Head, Piston, Pin, Rings, TE Gaskets & Ported Cylinder. Everything you need to get back to riding. **Fits all above 90cc models excluding Kymco models & Blast models. Application: Ported for MX.  -  LM90PC
$339.95
$329.95
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