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Discussion Starter · #1 ·
What is an exact replacement for the stock Chineese spark plug on the 49CC bikes?

I know the Champion CJ8 and CJ6 will work, but which is the correct Temp Range and is the same length?

KillJoy
 

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i use the champ, cj8 and it works perfect, and it is also for a 2 stroke, it is the best working plug that i have ever used, bosch, ngk ect, champ has my vote
 

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I also want to know what's the difference with cold vs. hot plug.

Could some one please show which plugs are hot and which are cold (with brands), advantages and disadvantages of using them. Sorry if I have too many questions. Thank you in advance.
 

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the Champion CJ8 is the best plug ive used so far for my X1... take my word for it.
 

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NGK's burn out faster. Use a spark plug made for a lawn mower engine which is Champion. Burns way cleaner and gives better overall performance. Champion is the way to go and they're pretty cheap at home depot.
 
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