What is the best spark plug upgrade for a 2009

Rik

 

I doubt the plug is your problem but you could go one hotter. If you have an 8 in there go to a 9.

 

waste- just clean your current plug with a wheel and regap. there are no benefits to a hotter or iridium plug in this engine other than a placebo effect.

 

In NGK a 7 is hotter than an 8 I just talked with NGK technical support and sent them a photo of the plug tip - it is wet fouled which they say is common with a jet kit and needs a hotter plug to keep it clean. If the tip is black at all it requires too much voltage to start.

 

Well done dog!!

 

sounds like your jet kit is out of whack and is too rich if your plug is wet and fouled. a plug tip is just the result of the mixture of your carb. just my experiences at least.

 

sounds like he got expert advice form the spark plug pros to me.

 

LOL!

IG is dead set against anything he hasn't tried yet.

Anybody who's done some performance mods and rides aggressively would be better-off going with 7 (next step hotter) plug.