Spark plug color Take a look

[kbyeeeeee]

This is out of my 84R full throttle plug chop I have went all the way down from a 150 to a 130 and it still looks rich. Pilot is a 50. It runs strong but stumbles and 7/8 to full throttle than it blows it out and takes off. should i go leaner?

[wanta86r]

im having the same issues- hopefully we can get some replies

[kbyeeeeee]

yea i am going to get some fresh plugs and do another chop. Might be due to using the same plug for a while??

[BIGCRIP28]

arent you supposed to use a new plug?
that thing looks old.

[jmack3986]

try adjusting your air screw while it is runnig tha should help out try a 1/4 turn first but before reset it to 1 1/2 and then adjust but you shouldnt have to go out more than 2 turns try that it is waht it sounds like. my buddys cr did that when i rode it and it was because of being lean it would stumble up top. but rich your plug looks fine it seems like a lack of air my be an issue. go to a 52 pilot jet and 142 main you are to lean this is stock settings for 85R air screw is 2 turns try that and 86 is 145 main and 42 pilot

[kbyeeeeee]

Yea idealy but i have a plug sand blaster. It only has a hour or so on it. Like i said i will get some new plugs and repost some pics.

[kbyeeeeee]

WOW I put the air screw almost 2 turns out and what a diffrence even with old plug it pulls the front end up in every gear.

[OldSchoolin86]

I'm pretty shure that's the wrong plug. What are you running?

[kbyeeeeee]

b8es or br8es ngk

[BIGCRIP28]

BR9ES, is what the dennis kirk shows for 83-84 R.

[OldSchoolin86]

I might have missed something so feel free to slap me around but this is was the plug should look like:

http://imagescommerce.bcentral.com/merchantfiles/5098835/ngk_b9es.jpg

[wanta86r]

I might have missed something so feel free to slap me around but this is was the plug should look like:

http://imagescommerce.bcentral.com/merchantfiles/5098835/ngk_b9es.jpg

i think you think the plug looks wierd because he cut the threads off the plug to read the plug chop correctly

[kbyeeeeee]

Wow my manual says in on place b8es and in another b9es so I will try this plug and let you know. is the plug i was using colder or hotter? top end or bottom end.

[OldSchoolin86]

i think you think the plug looks wierd because he cut the threads off the plug to read the plug chop correctly
Ah, now I get it. You don't have to cut up a plug to check it. A plug chop doesn't mean you have to literaly chop it, lol. The move to a 9 would be better but won't change anything too much. It just means it's one step colder and that's a good thing in your case.

[kbyeeeeee]

LOL you think i cut it cuz it called a plug chop FUNNY!!!
No I just cut it cuz its hard to get a good shot of the top of the insulator where you should be looking to tell if its rich or lean.

[OldSchoolin86]

LOL you think i cut it cuz it called a plug chop FUNNY!!!
No I just cut it cuz its hard to get a good shot of the top of the insulator where you should be looking to tell if its rich or lean.
LOL, sorry I had to jump on that one. So did you get it all figured out now or is it still cutting out on the top?

[kbyeeeeee]

Yea i put a br9es and did a plug chop it was WAY lean went up to a 135main still lean, so up to 138 still lean i am at a 140 now and it has a tan color on the tip of the white electrode and gets whiter the closer to the base. I think its still lean maby i need to go up to a 142??
any thoughts.

[jmack3986]

yeah the most important # ont the plug is bes the r stands for resister and it doesnt effect your spark under high voltage lines that is all it is *7sed for that schoolin is right go with b9es that would be your best bet and in winter run b8es. so i see the air screw helped you out. now get a new plug and run it hard near rev limiter and shut it off will in high rev third gear and pull clutch in and break then do a plug reading post it and i will help to tell you what to do if you are lean or not

[jmack3986]

yes go to a 142 and try that maybe 145 main try a 145 and go from there i think that is the one you need

[kbyeeeeee]

well put a 142 in plug still looks about the same then tried a 145 and it is even more choppy on the top end. seems like the 138 or the 140 ran the best i dont have my camera right now its in use with my step mom.

[kbyeeeeee]

Well put the 140 back in and it flys still a little hesitation the first couple times i hit top end but it goes away after i blow it out once or twice. The plug has a brown tan color on what is usually white. I think i have it pretty close.

[kbyeeeeee]

Ok I have went back to the 135 and it runs good. It got rid of the hesitation and stumbling. My air screw is at 1.75 turns out. needle clip at 2nd from top and 50 pilot. I hope this is close the plug is a br9es. any thoughts.

[jmack3986]

stick with 140 if it is all tan then tha t is it you should have to clear it out once since it is twostroke all that is is excess gas in the crank from startup since twostrokes give more fuel when you choke not cut off the air like four strokes go with 140 and use this oil with this ratio and i think you will be impressed. Belray MC1 or Belray H1r the bottle is 12.8 onces use mix the whole bottle with 4 gallons of gas and i swear on this stuff. my CR loves it. that is the best oil mixture to use with water cooled air cooled i would run 32:1. try that oil man it will impress you when you do a top end and everything is lubed perfectly

[kbyeeeeee]

No I use silkolene sx2. It is great oil. I will not change that. I use 4.75 oz to a gallon. Not good to change oil after you have spent a week jetting the thing. the 135 is back in and you have to remember its a 84 with a 30mm carb, bored .80 out, k&n filter, holes in the airbox lid. I think 135 is ok. It still fouls plugs if i sit and idle but that is attributed to the br9es plug and a rich bottom end.