New YFZ450R +5mm stroker crankBuilt by Crankworks in Tempe, AZHotrods HD stroker rod kitBalanced and welded at pinDrops right in – no case or head mods requiredWill work with stock piston and cylinderMakes 490cc on stock and 520cc on 98mm big bore motors6 month warranty*
DO YOU NEED THIS ITEM INSTALLED ON YOUR VEHICLE? WE HAVE YOU COVERED! AT WE HAVE BEEN OFFEIRNG THE BEST IN PARTS AND SERVICE FOR OVER 20 YEARS. VISIT US ONLINE, CALL US, OR COME SEE US IN PERSON AT OUR UPLAND, CA LOCATION.

PRICES AND LISTINGS ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE. DEALERS CONTACT US TO RECEIVE AN INDUSTRY DISCOUNT ON EVERYTHING WE SELL.

Returns: We accept returns within the first 30 days for all or part of your order, as long as any part(s) being returned are send back 100% complete, brand new, never installed, in the original packaging. Once items have been installed if there is an issue contact us for warranty.

Warranty: This item is NOT DIY. 99% of the people on this planet are not qualified to build an engine, and we always strongly recommend parts be installed by a qualified, experienced mechanic. This is a high performance part where expertise is vital to a proper install. Warranty does not cover any failure that is the result of improper installation, tuning, break in, lack of maintenance, or misuse. For any warranty to be considered the part(s) in question must be sent to us, along with an invoice showing installation by a professional mechanic, for inspection, NO EXCEPTIONS. We can not warranty parts based solely on photos, emails, phone calls, what you read online, or what another mechanic says is the problem.

We greatly appreciate your business. We know you have many choices for your power sports parts and service needs. Five-star feedback is greatly appreciated. If for any reason you feel we do not deserve 5 Stars on Google or eBay we ask that you contact us and at least give us the opportunity to correct the situation first. It is in ours and yours best interest for you to get the parts you want, in the condition you want, and that is what we strive to do with every order, big and small.

We are , located at 1538 Howard Access Road, Suite A, Upland, CA 91786. We are open Monday thru Friday, 7am to 4pm, PST. We can provide you with technical support before and after your purchase. We offer everything from an oil filter to a complete turn key engine, and no job is too big or too small.