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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
Cometic EST Gaskets - Extreme Seal Technology
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[QUOTE="extreme33, post: 1408092, member: 26196"] My EG 2009 Yamaha YZf 290 has had a constant problem with bad head gaskets. The bike gets about 10-15 hours of run time before coolant loss begins. It starts out slow at first and gradually looses more coolant over time. I've checked head and cylinder warp and even sprayed the gaskets with copper gasket sealant but still have coolant leaks over time. I've recently noticed on the Cometic website that they now offer a new line of gaskets called EST (extreme seal technology). [url]http://www.cometic.com/est.aspx[/url] Same part number as before but with an -EST suffix added. The price is also more for the EST line. (almost twice the cost) Has anyone had better luck with coolant leaks using the EST gaskets on a 4 stroke? On another note, the bike runs great and power is perfect. Raced for decades, owned dozens of bikes and brands, the 290 YZF is hands down my favorite bike. [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
Cometic EST Gaskets - Extreme Seal Technology
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