Question about 2001 Yamaha YZF-R6
An easy way to tell which cylinder has the miss fire is ti let it idle and get to operating temp. Then spray each header with a little WD-40 which should almost instantly cook off unless the cyclinder is missfiring in which case it will simply drip down the header. I would start by replacing the spark plug cap. Its a simple and inexpensive start which is quite often the case off missfires. For some reason the Old FZR's had a wicked problem with their caps hsorting the spark to the head instead of sending the spark to the plug. Dunno why but they did. Have you actually changed the plugs themselves? Also check compression on all cyclenders. A compression guage is fairly inexpensive and every mechanic or even a motorcycle enthusiast should own one. If the compression is ok, Coils are OK, and the Carbs were TRUELY disassembled fully and cleaned properly as well as synched then I would say that it must be a plug or plug cap. There simply isnt any other place to look.
Posted on May 25, 2009
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Posted on Jan 02, 2017
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