plug pictures BR9ES

[jasonsb]

Here is a picture of my plugs after a weekend(3 full days of riding) in Glamis. The bike seems to be jetted o.k. by the way it runs. I find myself changing the plugs after every trip. Is this normal. One side of the center porcelin piece is dark and the other half is tan. I am running the colder plugs BR9ES (Dune porting, +4 timing, 19cc domes, T5 pipes, twin K&N, 27.5 pilots, 340 mains, needle in middle)

[jasonsb]

Another pictures of the other plug:

[RNBRAD]

Looks good BTW, a plug chop is a better indicator though. Check this link for future reference. LINK

[Leadfoot350]

Its hard to chop things while you are at glamis. We all dont have the luxury of ridding around our block and chopping away. Is that the stock needle and you might want to try a 30 pilot but I am not sure. Someone else might chime in on this one.

[SDD]

You can do plug chops in glamis... just go down the sand highway. Your plug is clean on one side because of the flow pattern of the ports. Take a picture of the ground strap. Why did you switch to a colder plug?

[roosthrower]

not sure, but I think the br9's are actually hotter plug.

 

EDIT: I'm wrong

Edited December 4, 2004 by roosthrower

[jasonsb]

I tried a 30 pilot but it would die out when I pulled the choke out. I am using stock needles...I was thinking about Toomey needles if they are worth it. I was told to use the colder plug with porting and advanced timing. Someone let me know if they have experience with plugs.

[SICK BOY]

BR9ES pluges are colder then BR8ES.

[Banchetta]

That is from just normal riding? If so, then throw them back in, run it wot in 6th gear for 5-10 seconds, shut it down, coast to a stop, pull the plugs and take another picture and post it...You can't jet your mains w/ normal riding. Mains mostly control wide open throttle (wot). You'll find that the plugs will look TOTALLY different. BTW, go back to B8ES plugs.

Edited December 4, 2004 by Banchetta

[jasonsb]

That is from just normal riding? If so, then throw them back in, run it wot in 6th gear for 5-10 seconds, shut it down, coast to a stop, pull the plugs and take another picture and post it...You can't jet your mains w/ normal riding. Mains mostly control wide open throttle (wot). You'll find that the plugs will look TOTALLY different. BTW, go back to B8ES plugs.

288627[/snapback]

I did nun it wot a lot...but are you saying that you have to shut it down immediatley to get an accurate reading? Damm I won't get another chance to run it wot until my next riding trip. The bike is probably running on the richer side, so I'll go back to the B8ES plugs and try a WOT test next time out.

[Nightrider]

I would say unless your over 170-180 psi I would stick to the B8ES.

 

 

If you know your bike is jetted fairly close an just need to fine tune it,You can getting a good reading from just riding it,but you literally need to put a good 10+ hours of riding with some high rpm and high speeds.Let the plug really build up,then chop it,if the base ring is starting to fatten up with carbon,its probably a little rich.if its a off white or light tan,you probably need to bump the mains one size.The longer you ride,the better you'll be able to read it.Granted your jetting is very close,I wouldn't attempt it if your just starting to rejet for major mods.

Edited December 5, 2004 by Nightrider