spark plug question after plug chop

[03Blaster]

little background first. i live and ride between 5300-5500 ft elevation so that will change the jet size and all.


so i bought a new blaster its an 05 with FMF pipe and silencer, and k&n filter that i just recharged with no air box leak. i warmed the bike up took it around the block to make sure it was at operating temp and put a brand new plug in it, then ran it down the street 1st through 5th WOT and checked the plug and it looked like it didn't change colors. i took the carb apart the carb had a 290 jet in it so i put a 270 jet in it and did the plug chop again with same result.

here are pics of the spark plug after the first WOT run with 290 jet and the second pull with the 270 jet.

 

[mjgnslngr]

so, wheres the plug CHOP pics? thats the ONLY way to see the difference in jetting is to cut the plug to see the subtle changes in the smoke ring at the base of the porcelain.

 

[03Blaster]

where am i supposed to chop the plug at?

 

[Blaaster]

Like this.

Better pic but a bit rich.

 

[03Blaster]

so just cut the threads off?

 

[mjgnslngr]

yes. enough to expose the base of the porcelain like in the pic.

 

[03Blaster]

okay i cut the threads off which is a pain in the ass with a dremel.

 

[mjgnslngr]

second pic is Perfect!!!!!!

 

[89blaster89]

just wonderin how long did you hold WOT

 

[EZRider76]

just wonderin how long did you hold WOT

You still having problems 89blaster89? I'd say get good and quick at changing those plugs and run it illegal down the road, swap out and get the hell back...that's what I'm having to do these days. Where do you ride? There has to be someplace you can do a full WOT run for a plug chop.

 

[03Blaster]

the first and second pic are of the same plug just different angles lol. so that light brown line at the bottom of the porcelain is what i want?

i just made sure i ran it WOT to the very top of 5th gear and right when i let off the gas i cut the motor and coasted back home.

 

[mjgnslngr]

yes! that coffee brown is perfect!

 

[03Blaster]

awesome! the only issue is i did one pull from 1st-5th with the 290 jet and one 1st-5th pull with the 270 jet lol

 

[89blaster89]

You still having problems 89blaster89? I'd say get good and quick at changing those plugs and run it illegal down the road, swap out and get the hell back...that's what I'm having to do these days. Where do you ride? There has to be someplace you can do a full WOT run for a plug chop.

yep id be done by now but i have no place to plug chop and really dont wanna run it down the road but ill figure somethin out...im thinkin im just gonna keep trying my 4th gear WOT i been also usin the brakes to make it pull harder lol

 

[03Blaster]

hell i ran mine down the main street in my neighborhood 3 times today to do my plug chop haha

 

[mjgnslngr]

lol, sounds familiar! i even had the neighbors kids chase me on their bikes!!!

 

[03Blaster]

awesome! the only issue is i did one pull from 1st-5th with the 290 jet and one 1st-5th pull with the 270 jet lol

so do you think i am safe with the 270 jet since i did two pulls with different jets and then cut the plug up?

 

[mjgnslngr]

what does the 290 plug look like?

 

[03Blaster]

well thats the thing. i did the 1-5 pull with the 290 jet and 270 jet on the same plug...

 

[mjgnslngr]

Noooo, you gotta use another plug man.