When is vtr running too lean ?
#1
When is vtr running too lean ?
Just wanted to know when is vtr running too lean . Have 1998 vtr1000f with 19000 miles , termignoni pipes and aftermarket air filter . I assume previous owner rejetted , but dont know for sure . Dont have surging , popping on acceleration or deceleration . What color must spark plugs be using unleaded fuel . Found that my exhaust cannisters are not black but light grey at the tips and inside the cannisters after a good run . Left one more than the right one . When looking inside the cannisters where the headers start , I can see it has a black color . Even took a peace of cloth and shoved it down the canister where headers start and it came out with black soot on . Spark plug color is brownish and plugs still looks new .
What do you guys think . I believe reading spark plugs on unleaded fuel is more complex and exhaust color not really a factor .
What do you guys think . I believe reading spark plugs on unleaded fuel is more complex and exhaust color not really a factor .
#3
You might want to check the technical support section of the Factory Pro website. There's a very good article on jetting CV carbs. It will help you identify whether your bike is running rich or lean.
#4
A tan color on a spark is very good so it sounds like jetting is fine.
Here is a site I ran across with some pics of plug colors and their meanings.
http://www.dansmc.com/Spark_Plugs/Sp...s_catalog.html
Here is a site I ran across with some pics of plug colors and their meanings.
http://www.dansmc.com/Spark_Plugs/Sp...s_catalog.html
#5
Running a bit rich on the VTR is not a bad thing. The big twin likes a little more fuel...but not too much. The cans will show a little black soot as you have. Plug should be tan. Anything other than tan on the plug and you're too rich. Blistering on the plug and it's too lean.
#7
Just curious , are you or have you run race gas in it ? Running race gas always turns the inside of my exhaust tips a light gray . It does on everybike I have ever run it in .
Last edited by HRCVTR1000; 11-11-2008 at 07:23 PM.
Thread
Thread Starter
Forum
Replies
Last Post