WORKS ON ALL ’01-13 YAMAHA YZ250F and WR250F MODELS – THIS IS A 310cc REBUILD TO YOUR MOTOR, ALONG WITH A FULL RACE PORT AND POLISH TO YOUR HEAD, THAT YOU SEND IN TO US
Complete 310cc big bore stroker rebuild TO YOUR ENGINE YOU SEND IN(contact us for details and shipping info)Used core bottom end – cases, transmission, counter balancer, hardware, etc. – all other parts below are newNew BPR 83mm cylinder83mm Wiseco forged big bore pistonNitrite coated piston ringsChrome wristpinCirclipsHotrods +3mm stroker crankshaft assemblyCrank bearingsCrank balancer bearingsTransmission bearingsWater pump bearingShift cam bearingClutch bearingsCam chainCam chain guidesGasket kitCometic 83mm MLS big bore head gasketSeal kitValve stem sealsK&N oil filterNGK spark plugWater pump impellerK&N oil filterTitanium head stud kit – LIFETIME WARRANTY*Any miscellaneous OEM parts needed
Labor included:Complete tear down, clean, and inspect all partsSet piston ring gapFULL RACE PORT AND POLISH TO YOUR CYLINDER HEAD3 angle valve job to your cylinder headShim and install cams in head – New cams are extra $$Lap and install valvesComplete assembly
Runs on pump or race gas6 month warranty*
ARE YOU INTERESTED IN HAVING YOUR MOTOR REBUILT WITH THE ABOVE PARTS?NO PROBLEM, WE HAVE YOU COVERED. JUST CONTACT US FOR DETAILS AND PRICES!

We are , offering you the best in parts and service for over 20 years. If you need your vehicle repaired, parts, or you just have technical questions call, email, or come see us at our Upland, CA location Mon to Fri 7am to 4pm, PST. We accept payment via credit card, Paypal, Venmo, Cash App, and in person via cash or check (once cleared).

PRICES AND LISTINGS ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE.

REPAIR SHOPS AND DEALERS CONTACT US TO SET UP AN ACCOUNT AND GET A DISCOUNT ON ALL YOUR ORDERS

WE SHIP WORLDWIDE AND WE PROCESS ORDERS 7 DAYS A WEEK. TAMBIEN HABLAMOS ESPANOL!

*Interchangeable part:We stock the same parts from different manufacturers so that when back orders occur we have a part that is equal in quality and cost to send, preventing what can sometimes be long waits.This would be the only reason your order might vary slightly from the description, and the part that is subbed will always be comparable quality.If you only want a specific brand just ask and we will let you know if it is out of stock and for how long.

**Returns: We accept returns for part or all of your order within the first 30 days. Refunds are only granted for parts that are returned 100% complete, brand new, in the original packaging. Once a part has been installed or prepped for installation it is no longer eligible for return.

**Warranty:This product is NOT DIY. Over 99% of people in the world are not qualified to build an engine, and the person installing the motor on the bike and tuning it is responsible for ensuing it works properly. WeALWAYS STRONGLYrecommend work be done by a qualified, experienced mechanic. 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, what you read online alone, or what another mechanic says the problem is alone.Warranty does not cover any failure that is a result of improper installation, tuning, break in, lack of maintenance, or misuse.

Feedback:Positive feedback is greatly appreciated. We work very hard to maintain a high feedback rating, and we want all of our customers to be happy. Receiving positive feedback when an order goes the way it is supposed to is a huge help. If you do not feel we deserve positive feedback PLEASE contact us prior to leaving feedback and we will do what is needed to help you feel as “positive” as possible about your experience.Please work with us and we will ALWAYS work with you.