826H Steahly Off Road flywheel weight 13 oz YZ 250 03-15 Five Star Rating (their highest) in Motocross Action Magazine August 2011... "makes each gear pull further, stronger and longer". Make your power as smooth and tractable as Randy Hawkins YZ when he won the 2004 National Enduro Championship using a Steahly Flywheel. Reduce stalling like Jason Raines when he added a Steahly Flywheel for his 2003 and 2004 National Hare Scrambles Championships. Get predictable and reliable power like Barry Hawks GNCC Championship winning YZ 250. Easy installation, no special tools needed, but an E-3 engine lock up tool will make it easier. We recommend adding 11 ounces for most intermediate trail riders and less aggressive MX riders. 9 ounces for aggressive trail riders and intermediate MX riders. 13 ounces for casual trail riders or very technical terrain. 7 ounces for aggressive MX riders. Fits under the stock plastic ignition cover with out modification, however, if you have an after market metal cover such as Boyesen, you will need to get our Y-826 cover spacer. Check my other items. Can't find what you are looking for? Just type in what you need in the search box above and click search. Shipping: Calculated shipping and handling amount. Upgraded shipping available. Will ship multiple items for a reduced price. The more you buy, the more you save. All items in STOCK and shipped same or next day after payment Monday through Friday. Payment: IF BUYING MULTIPLE ITEMS REQUEST A TOTAL BEFORE PAYING! IF YOU DO NOT REQUEST A TOTAL AND MAKE PAYMENT THERE WILL BE NO REFUND. YOU MUST REQUEST A TOTAL BEFORE PAYING. PA residents must add 6% sales tax. Always include your FULL shipping address. All payment and tracking information is automatically emailed to you. Payment expected in 5 business days. Outside of US buyers are responsible for any tax or fees your country charges you, and no item will be shipped as a gift. Returns: 7 day return policy. No returns after 7 days from receiving item. Does not include electrical or engine parts. 20% restocking fee. Must be returned in original unopened sealed package. No returns on any opened, installed, or used part. No exceptions. Buyer pays return shipping and refund is for item price only, not shipping cost. Refund is store credit only.