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Old 03-23-2011, 03:44 AM
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bairdco bairdco is offline
a guy who makes cool bikes
Join Date: Aug 2009
Location: living the dream in southern california
Posts: 6,258
Default Re: what plug is best to replace stock

i've never been a fan of Splitfire plugs. when they first came out years ago some guys i used to buy honda parts from did a review of them for a major magazine.

they put them into a mustang 5.0 engine on the dyno, and within a few minutes one of the electrodes broke off and destroyed the engine.

as far as a 3 point plug on our engines, i think it's overkill. there's only so much (or so little) performance gain you can get on a single cylinder engine. i mean, every little bit helps, but the difference between a good NGK BH series plug and some fancy exotic plug is so minimal it's just not worth the price difference.

that being said, i think any name brand, quality plug is miles better than the stock one. the quality is so bad i just throw them into a box and forget about them. some people like 'em, though. if nothing else, i'd change them out just for peace of mind.

all my bikes run a 7mm copper core wire, NGK B6 or B7HS, and a nice tight boot, gapped at .030

can't go wrong with that.
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