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Old 01-07-2012, 01:55 PM
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Jumpa Jumpa is offline
Motorized Bicycle Elite Member
Join Date: Aug 2011
Location: Cape Cod
Posts: 606
Default Re: ngk spark plug for slant head

I use the BP7HS and have no issues I also use 2 aluminum head gadgets though however it never hit the piston when I had just a one.

I just put the second one on because, I read told me you can get more compression or some thing
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