Spark plug performance?

#7
Ty may not see a difference between plugs, but I believe the NGK is easier to read and therefor tune the engine. You can throw a 3910 in a stock motor an notice a difference because the cheap plugs that come in the clones and Predators are so awful lol!


Sent from my Texas Instruments Speak and Spell...[emoji2]
 
#9
And ngk bpr6hs/bp6hs are the short reach version of those same plugs. For those who have trouble with the clearance between the spark plug and piston.
 
#11
And ngk bpr6hs/bp6hs are the short reach version of those same plugs. For those who have trouble with the clearance between the spark plug and piston.
Hey, I'm a newbie so I am not sure the difference between all the plugs. I have automotive knowledge but new to small engines.
I bought a Coleman CT200u , I believe it's a gx200 6.5 clone. What NGK plug can I get for it, all I did so far was cold air intake and header.
 
#14
If you look up inside the spark plug boot you will see that you can take the end of it out.. with a flat tip screw driver..and there is a resistor behind it .. you can use something solid to replace it... but I just add a regular spark plug wire end and its done.
 

Twid

Active Member
#19
FYI ngk part number is bpr6es if you want a resistor in it like stock. Bp6es is the non resistor version of the plug.
Do you know what the part number for the resistor version of autolite ar3910x and for the short reach version of those plugs as well?
 
#20
Do you know what the part number for the resistor version of autolite ar3910x and for the short reach version of those plugs as well?[/QUO

I understand you want to soup up your bike and make those performance enhancing upgrades...but this whole spark plug thing isnt necessary...Id say Build your motor up! then worry about the small things that Could make you that extra 1/2 hp....other wise all this & that for a stock motor is a waste of time....IMO
 
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