Spark plug is bumpy...

[400exrider0004]

It sounds weird but is true. The plug is rough and covered with bumps. I am thinking it is from the fuel I run which is Sunoco 110. I run this because my bike runs hot and will start running rough. This fuel does make the bike run cooler. I know it isnt necessary to run this high of octane with a 12:1 piston, but it has made a difference. My jetting is to Sparks request and my spark plug is tan underneath all the bumps. Is this from the fuel or what. Should I mix half and half?

[quadwanter]

Originally posted by 400exrider0004
It sounds weird but is true. The plug is rough and covered with bumps. I am thinking it is from the fuel I run which is Sunoco 110. I run this because my bike runs hot and will start running rough. This fuel does make the bike run cooler. I know it isnt necessary to run this high of octane with a 12:1 piston, but it has made a difference. My jetting is to Sparks request and my spark plug is tan underneath all the bumps. Is this from the fuel or what. Should I mix half and half?

I always thought that using higher octane fuel when not needed resulted in loss of preformance? correct me if im wrong

[the Z Man]

Try switching to 91 pump gas and see what happens..
Those plugs are like 25 bucks though

[400exrider0004]

I know:ermm: I would get a new spark plug and try some different things and see what happens, but like you said they are around 20 bucks.

[pro-rider46]

i saw plugs on some site, they were like balk, and like 7 plugs for 35 bucks or something, so thats a really really good deal

[400exrider0004]

I just ran the bike and it runs great. I am not sure what is causing this weird texture on the plug. Does any one have any ideas?