Best and cheap spark plug?

[xDeeVy465x]

New to the YFZ, not new to quads, but need a bit of expertise, Whats the best spark plug to use while running 110 60/40, i dont know the compression of the piston but if i had to guess 13.1? Also has ported and polished head and 470bigbore. thanks in advance old plug is old and isnt burning the race gas and is just puffing smoke.

[dehner47]

go with a ngk. what i run in most all my bikes. great plug at good price. go to any moto shop and they should have the one you need.

[BrettOaktree]

ya, mostly everybodys running variations of the ngk cr8e on the yfzs, thats wat i have too and their only around 8 bucks

[Ride1Rob]

I always thought NGK's were the plugs to run and was what everyone ran. Your problem could be more than just the spark plug. Would be good to find out the true compression of the bike. It also could be due to rich jetting from your carb.

[xDeeVy465x]

Found out the gas in there is about a year old, lol could be just nasty gas.