90" Monster Big Bore Kits / Sportster
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- Fits '91 - '20 Sportsters
- 90” KITS FOR 91-20 XL 3 7/8” BORE; 3 13/16” STROKE; 10.5:1cr FLAT-TOP
PISTONS (WITH 62cc HEADS) (XR1200 REQUIRES PURCHASE OF
GASKET KIT PART #0934-3181) -
Aerospace-grade all-aluminum cylinder with nickel-silicon-carbide (NSC) electroplated bore
- No sleeving allows for larger bore sizes
- NSC-plated cylinders have less friction for increased horsepower, lower engine temperatures and a longer lifespan
- Monster big bore kits will require case boring
- Includes pair of all-aluminum NSC-coated bore cylinders, custom-forged pistons with high-tension rings specifically designed for NSC cylinders and a head/base gasket set
- Replacement gasket sets available separately
- Upgraded cylinders studs and head bolts recommended
- Made in the USA
90" Monster Big Bore Kits / Sportster
Sale price$1,343.95 USD
Regular price
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90" Monster Big Bore Kits / Sportster
Sale price$1,343.95 USD
Regular price
