Question about 2001 Yamaha YZF-R6
You did not mention if you have replaced the exhaust headers. The problem you are describing sounds like a carb problem. You mention you have had them cleaned and re-jetted. No jetting necessary if you have not installed headers, or have removed the air intake box. Try this, clean the spark pulg tips, so they look bright shinny. Ride the bike a round for a bit keeping the RPM's up close to your bog. Pull the plugs and look for white or dark deposits. If your plugs are white, or tan, your are running lean (too much air too quickly thru the combustion chambers), and the carbs need re-jetting or your air filters need oiling. If your plugs are dark, (black sooty) she is running rich and you need to re-jet with smaller jets, or free up the intake.
Posted on Apr 07, 2011
There are few possibilities causing this problem.it has to be checked.it can be a bad gas problem or cracked or not properly fitted air filter issue.also it can be spark issue. Either a bad plug or bad coil pack. i agree the spark plugs and coil packs are checked.but still in this cases the coil packs and spark plugs if they are very old or worn out can cause this problem.
You can change the plugs. . Then see if you still have your problem. If you do, disconnect the coil packs one at a time and run the bike. If the problem is worse with a coil pack disconnected you know you made a change for the worse. If you unhook one and the problem manifests the same way then that coil is bad. -------------------- You can't run a clean High air flow filter with stock jetting. So make sure you have the proper filter and/or the proper jetting and make sure that the air box is right in place and doesn't have any gap under which could let too much air coming in the engine. --------------- There's an easier way to test for spark/coil pack. A very simple test for you to do without even tearing into the bike is to make sure the engine is cold. I would even let it sit overnight, then start it up and let it run for about 30-60 seconds (enough to let the headers get warm). Then with your hand, test each header,the one that isn't hot/warm is the cylinder that's not getting spark.Once you've determined what chamber isn't getting spark, it's just a matter of trial and error to see if it's the spark plug or the coil pack. You can swap either the coil pack or a spark plug to another cylinder, re-assemble everything and then try the test over again. ---------- Also check the fuel pressure and fuel pump.get the TPS sensor checked.This checking will point out towards the faulty part causing the problem.thanks.Helpmech.
Posted on Apr 06, 2011
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Posted on Jan 02, 2017
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