Which Spark Plug to Use?
Posted June 26, 2001 - 05:04 AM
P.S. CUT THAT GREY WIRE! Yeehaw!
Posted June 26, 2001 - 07:54 AM
I am going through the same thing you are (looking for the best plug). I have a buddy here on TT that I race with who has the 99 YZ400F and the 01 YZ250F. Based on his experience the splitfire 430B??? works for him. I am going to check the numbers again with him then order one for my WR250F to try.
hope this is helpful,
2001 WR250F - Snorkle out, t-stop cut, grey wire mod, YZ timed, DR.D Pipe, Ty Davis/IMS seat and tank, handlebar hot start, panoram computer, Mich S-12 Rear/ Mich starcross MS2 front, Ty Davis rad supports, Scotts Damper and triple clamp w/ Protaper bars, stock jetting, fuel screw 1.75 out, that's about it...
Posted June 26, 2001 - 08:20 AM
Posted June 26, 2001 - 08:51 AM
I went to my dealer the other day and asked for replacement plug for 98 WR and he gave me NGK CR8EVX. I figured it was what came with bike since I just got it but when I pulled the plug and looked in my shop manual it has the NGK CR8E. The box for the CR8EVX says Platimum on it. I wasn't sure if I should use the platinum one or not. Is there a difference? Will the bike run hotter? Any suggestions would be helpful.
Posted June 26, 2001 - 09:23 PM
I have never used any other brand.
Posted June 26, 2001 - 10:31 AM
I live in Michigan also. I understand about the weather beleive me. I own a WR426, and had no problems with plugs as of yet. However, did you change anything in the carb? Just thought I would ask.
Posted June 28, 2001 - 07:57 AM
I'm all stock except the airbox lid, throttle stop, and grey wire. Everything is running flawless right now. I'm enjoying it while I can.
Posted June 28, 2001 - 08:17 AM
Originally posted by *mike68*:
How often should you change them. I got ovet 1000mi on my 01 426 and it still runs like a champ.
I have heard that the electrode can get fatigued and break off after time. What I heard was to change them at least every 1000 miles.
Posted June 28, 2001 - 08:34 AM
then I cut the grey wire and the plug fouled 20 miles later(changed it on a mosquito infested trail).
should have done it sooner
I'm pretty sure there is no connection.
I'm sure my plug was just too old.
I am now replaceing my balencer drive gear straight key.(mine is all smashed up)
hope it is the source of my engine rattle.
finally a place to get great info.
Big thanks to everyone at thumpertalk