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| Motorized Bicycle General Discussion Topics on bicycle engine kits, help articles, repair and modifications for your motorized bicycles |
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03-03-2009, 03:15 PM
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Motorized Bicycle Newbie
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Join Date: Mar 2009
Location: Illinios
Posts: 14
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Which sparkplug?
What plugs are used in these in frame china girls? I know everybody says NGK B6HS. My real question is what are equivelents ( Heat range too ) in Champion,Autolite,Bocsh etc. if there are any. Thanks
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03-03-2009, 03:29 PM
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Godfather of Motorized Bicycles
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Join Date: Jan 2008
Location: Ashtabula county, Ohio
Posts: 10,001
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Re: Which sparkplug?
SPARK PLUG CROSS REFERENCE
About 3/4 of the way down you'll see the B5HS plug and all it's replacements...
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If it ain't broke, and you mess with it long enough, it will be.
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03-03-2009, 03:40 PM
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Motorized Bicycle Senior Member
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Join Date: Jan 2009
Location: st.petersburg fla
Posts: 83
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Re: Which sparkplug?
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03-03-2009, 05:21 PM
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Motorized Bicycle Newbie
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Join Date: Mar 2009
Location: Illinios
Posts: 14
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Re: Which sparkplug?
Got to love computers, Bikeguy says look below 3/4 way down, there is one other post about e5-12 withh a sparkplug website  but I could not open it except for the home page
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03-03-2009, 05:56 PM
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Master Bike Builder & Forum Sponsor
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Join Date: Dec 2007
Location: Duvall, WA PNW
Posts: 3,281
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Re: Which sparkplug?
We say just stick with NGK. Low cost, best, least prone to foul. You really might want to try NGK BP6HS. "P" is extended electrode.
Scroll for NGK plugs
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03-03-2009, 06:05 PM
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Motorized Bicycle Elite Member
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Join Date: Oct 2008
Location: Australia Brisbane
Posts: 216
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Re: Which sparkplug?
thanks for that info pablo. I was going to get a B6hs but i might see if they hav a BP6HS.
Just a question what does an extended electrode actully do???
Thanks
BB
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who needs a car wen u can have a motor bicycle 
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03-03-2009, 09:43 PM
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Master Bike Builder & Forum Sponsor
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Join Date: Dec 2007
Location: Duvall, WA PNW
Posts: 3,281
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Re: Which sparkplug?
Quote:
Originally Posted by brisbane_boy
thanks for that info pablo. I was going to get a B6hs but i might see if they hav a BP6HS.
Just a question what does an extended electrode actully do???
Thanks
BB
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Per our web page:
Quote:
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NGK BP6HS.....with an extended tip, it centers the spark in the combustion chamber and actually displaces volume, effectively increasing compression ratio. An added benefit is with the protruding electrode the plug is even more foul proof than the standard B6HS. Also, the 6 is a cooler heat range for those hard max throttle runs.
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Also in the "5" heat range.
Quote:
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NGK BP5HS.....with an extended tip, it centers the spark in the combustion chamber and actually displaces volume, effectively increasing compression ratio. An added benefit is with the protruding electrode the plug is even more foul proof than the standard B5HS. Also, the 5 is a hotter heat range plug for those colder days.
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It's a LOT better in the fouling department, and you just might feel a little power. Tiny difference but with a single cylinder so dependent on the plug, using the best plug is something we see as important.
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03-04-2009, 12:10 AM
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Motorized Bicycle Elite Member
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Join Date: Jun 2008
Location: memphis tn
Posts: 849
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Re: Which sparkplug?
Didn't we have a post about some one using a different plug and it stuck down into the chamber a little too far with the result of the piston head hitting it?
I know my memory doesn't work very well at times but I'm pretty sure I read something like that somewhere.
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03-04-2009, 07:11 AM
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Master Bike Builder & Forum Sponsor
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Join Date: Dec 2007
Location: Duvall, WA PNW
Posts: 3,281
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Re: Which sparkplug?
It could happen is someone used the wrong plug.
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