BradT Posted April 24, 2008 #1 Posted April 24, 2008 Can someone tell me what the difference is (besides the number). Spark plugs DPR8EA-9 and DPR7EA-9 The plugs I removed from the bike were with the "7", they look almost identical. Also why would you use one vs the other. ? Brad
Cutty Posted April 24, 2008 #2 Posted April 24, 2008 Can someone tell me what the difference is (besides the number). Spark plugs DPR8EA-9 and DPR7EA-9 The plugs I removed from the bike were with the "7", they look almost identical. Also why would you use one vs the other. ? Brad The 7 plug is a hotter range plug. Jetting is one reason to change, sometimes if running to rich a hotter plug might correct your performance and to lean a colder plug could be the answer. Always check air filter first as this might be the main problem.
BradT Posted April 24, 2008 Author #3 Posted April 24, 2008 Thanks. Seemed to run smoother with the 7 (hotter) plugs than the 8. Air filters were just cleaned as well. Do not think the gas mileage is affected. Brad
gibvel Posted April 24, 2008 #4 Posted April 24, 2008 Brad, Everything you ever wanted to know about NGK spark plug numbering: http://www.spark-plugs.co.uk/pages/technical/ngkjpg.htm
(2).thumb.jpg.7092a7f3a80adddbf4f7a25510b6c0b0.jpg)
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now