http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=96145 I just received the ad HF mails out.... this engine is on sale for $299.99 in store.... normally $379.99 Well they ALSO just released a 20% off coupon Feb 20-23 (they emailed it to me). That would make this monster engine cost only $239.99! Remove the rev limiter on this bad boy and you could reach 18-19HP. Someone should build a motorized bike around this engine!!! If I had the money I would be tempted to try it.