hotter/colder plugs

General Jackson /

They only had plugs that were 6's not the fives i had at the auto store, so i'm running a cooler plug. they seem to work great but it could just be because now i have new plugs.

what say you on this type of switch?

Re: hotter/colder plugs

fish_SHARK /

whatever works, is what i say

Re: hotter/colder plugs

5,6 or 7 is what you run in a 50cc. 5 in a very slow cylinder, 6 in a normal one and 7 in a fast cylinder.

In a 70cc you run 8 or 9. 8 is for fast cylinders, 9 is for crazy ass fast and/or overheating cylinders.

Re: hotter/colder plugs

I switched from a 5 to a 6 on my sparta and it got rid of the pinging i would get on slight down hills at WOT

Re: hotter/colder plugs

roald, get on chat now

from my experience, it has more to do with compression. High comp kits need cooler plugs.. i usually only switch from six when i have a hard time getting a bike dialed in, to see if i can get it running better. Thats only a rule of thumb, too, because i had a really fast puch that ran a 5, really rich, super high compression.

Re: hotter/colder plugs

fish_SHARK /

yeah, under a really high compression bike ive had to run a 5 just to keep the carbon off the plug

Re: hotter/colder plugs

Cleats Onionpockets /

What is the complete number we're talking about here? What brand of plug? I've been using champion plugs...I take it we're not talking about those here.

Re: hotter/colder plugs

they're talking about NGK's plug numbering system

how much of a bump in compression would you say warrants a cooler plug? i just bought a brand new heat range 6, but i'm putting a higher compression head on this week. should i spluge and spend another couple bucks to get a 7?

Re: hotter/colder plugs

Re: hotter/colder plugs

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