Author Topic: Side Firing Plugs  (Read 1150 times)

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Offline 1974CB750rider

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Side Firing Plugs
« on: October 13, 2009, 03:52:30 PM »
I just checked out Cycle X website and read a tip on there about shaving 3/16" off the spark plug electrode and then regapping them and re installing making what is known as side firing spark plugs. The web site said it was a  free and easy horsepower gain. Anyone tried it?
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Offline 1974CB750rider

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Re: Side Firing Plugs
« Reply #1 on: October 13, 2009, 05:38:27 PM »
People with closed minds cannot learn new things.

Offline Don R

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Re: Side Firing Plugs
« Reply #2 on: October 13, 2009, 05:46:37 PM »
I have some in my 750 now, they work fine and resist fouling. We ran em in my buddy's blown alcohol dragster. they worked good there too. horsepower? maybe. I just checked the spark a little while ago.  I pulled the plug away from the ground and I became the ground. Yep plenty of juice there! WoW.
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Offline 1974CB750rider

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Re: Side Firing Plugs
« Reply #3 on: October 13, 2009, 05:48:42 PM »
I was just wondering if anyone here tried them, didn't want to burn a hole in the top of a piston.  ;DLOL
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Offline Alan F.

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Re: Side Firing Plugs
« Reply #4 on: October 13, 2009, 06:08:33 PM »
I'd say it's probably a safe bet, Ken of Cycle-X is known here as a top shelf guy on the sohc4 bikes, lots of knowlege there.
You can always call him directly to discuss it, I understand he's not much for email.
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Offline fmctm1sw

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Re: Side Firing Plugs
« Reply #5 on: October 13, 2009, 06:09:38 PM »
I just checked out Cycle X website and read a tip on there about shaving 3/16" off the spark plug electrode and then regapping them and re installing making what is known as side firing spark plugs. The web site said it was a  free and easy horsepower gain. Anyone tried it?

I've done it on both my bikes.  I was hoping it would help them not carbon up but it hasn't.  I've ben fighting an off idle blubbering issue for a little bit...  I think if you search on "side gapping" you may turn up some posts here where it was discussed...
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1973 CB350F
1973 CB350G
1975 CB550K
1983 GL650I
1973 CB750K3 (http://forums.sohc4.net/index.php?topic=92888.0)
1984 Kawasaki KLT-250 (AKA 3 wheeler of death)
1994 Honda TRX300
1999 Honda TRX250