YFZ450R YFZ 450R 14:1 Hi Comp Big Bore Kit Race Gas Piston 98mm +3 Cylinder 478cc
YFZ450R YFZ 450R 14:1 Hi Comp Big Bore Kit Race Gas Piston 98mm +3 Cylinder 478cc

YFZ450R YFZ 450R 14:1 Hi Comp Big Bore Kit Race Gas Piston 98mm +3 Cylinder 478cc

Regular price$836.00
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Shipping calculated at checkout.

FITS ALL YAMAHA YFZ450R/X MODELS AND YEARS FI MODEL ONLY!
  • 98mm BPR big bore cylinder
  • 14:1 CP-Carrillo Custom forged big bore piston - RACE GAS OR ALCOHOL ONLY
  • Nitrite coated piston rings
  • Chrome wristpin
  • Circlips
  • Maxlok TITANIUM head stud kit - LIFETIME WARRANTY*
  • Top end gasket kit
  • Cometic MLS big bore head gasket
  • Timing chain
  • NGK spark plug
  • No mods required for big bore - bolt on kit
  • Piston is race gas only
  • All new parts, authorized distributor

 *Warranty: If after installation there is an issue contact us for a warranty return.  This product is NOT DIY.  Over 99% of people in the world are not qualified to build an engine, and it is the responsibility of the person assembling and tuning the engine to make sure all the parts are correct and work properly.  We ALWAYS STRONGLY recommend parts be installed by a qualified, experienced mechanic.  STUD WARRANTY: If for any reason a stud fails during use, not installation, we will send a completely new stud kit.  No other parts or any labor are included, and it cannot be converted to a refund or discount on any order.  Any part(s) for which a warranty claim is made must be sent back to us for inspection, NO EXCEPTIONS.  We cannot warranty anything based on photos, emails, phone calls, or what you read online alone, or what another mechanic says the problem is. Warranty does not cover any failure that is a result of improper installation, tuning, break in, lack of maintenance, or misuse.

We ship next day most of the time. Modquad parts are shipped Monday-Thursday. Engine Kits are 3-5 business days.

We don't do backorder! If your items has already sold you will be notified immediately and you money refunded on the spot.

Sold items are removed daily.

If you see it on this website, it is 100% in stock unless it just sold before you clicked buy.

If you call we answer, if you text we respond, if you have a question we respond. Sometimes we sleep so it could be next morning but we will respond.

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Cut em Up!

Dune Goons Rider ~ Breanna
Showing her personal style and cutting the shirts up to her liking. We don't mind one bit! Cut em Up!