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Gooch

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  1. My 2011 had all the same symptoms, I bought it in 2013 and it never had a solid idle. As time went on the rpm started climbing on its own, idle hunting, stalling on downhills, cold and hot starts became difficult taking many kicks to start, bogging off the bottom and midrange, I couldn't ride the bike. I tried everything short of replacing the crankseals, cleaned the carb, took apart the fuel pump and cleaned it, checked the reeds and reed block, siliconed all the gasket surfaces, replaced the fuel filter and fuel lines, The one telltale sign was that it was always wet around the case bolt that is in between the cylinder and carb, I thought it was the nipple on the reed boot leaking so I applied teflon tape to the threads, no results. As soon as I sprayed carb cleaner in this spot, the motor died. So I removed the cylinder and low and behold the base gasket was blown. The mating surface behind the rear transfer port is only about 2.5-3 mm wide and an obvious weak link. The gasket itself was in pretty rough shape, saturated with fuel and at the rear transfer port, completely gone. So after replacing the gasket and torquing the nuts down, (I went with 22Nm) I fired up the bike on the 2nd kick and it ran normal. I went for a ride the next day with great results, no hunting, no revving, no rpm overrun and hotstarts were 1or 2 kicks. The whole repair took about 45 minutes.
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