Question about 2003 Yamaha YZF-R1
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Posted on Jan 02, 2017
Either way too lean, or air intake leak, or the cam timing is out.
Does it help with the choke on?
Not certain of the timing on that model, but at top dead centre there should be some marks on the cam sprockets that will line up with the rocker gasket surface. The previous owner may have changed the timing by a tooth or two to try for more performance .
Posted on May 07, 2010
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