86 yz125 hotter plugs?

G

gr411

Member

Feb 8, 2009

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• May 26, 2009

• #1

hey i keep fouling plugs im running a B9EG NGK spark plug whats a better hotter plug i should use?. Does it do any harm having a hotter plug in it? And will it run dif should i jet it after hotter plug is in.

ps. i put fatty and silencer and power reeds on and then a new plug never had problems with the fouling before the power reeds were on

Thx guys
Brett

 

Rich Rohrich

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• May 26, 2009

• #2

http://www.dirtrider.net/forums3/showthread.php?t=173327

 

G

gr411

Member

Feb 8, 2009

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• May 26, 2009

• Thread starter
• #3

thank you i still need to find out wich plug i should use for my bike and what does a fouled plug look like

 

Rich Rohrich

Moderator / BioHazard

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Jul 27, 1999

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• May 26, 2009

• #4

gr411 said:

thank you i still need to find out wich plug i should use for my bike

Click to expand...

Read the thread in the link and you'll be able to figure out what to do.

 

J

_JOE_

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May 10, 2007

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• May 26, 2009

• #5

http://www.ngksparkplugs.com/tech_support/spark_plugs/faqs/faqread.asp

 

whenfoxforks-ruled

Old MX Racer

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Oct 19, 2006

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Merrillville,Indiana

• May 26, 2009

• #6

Read the plug, it will tell you if you have the correct heat range. No one else can tell you. Or you can take REALLY good pics and post them?

 

G

gr411

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Feb 8, 2009

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• May 27, 2009

• Thread starter
• #7

well thats odd cuz the plug looks fine when i took it out after i thought it fouled it lookes like it should with good jetting just a bit wet

does out board 2 stroke oil matter cuz i used that when i figured i shouldint have

 

R

rmc_olderthandirt

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Apr 18, 2006

1,533

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• May 27, 2009

• #8

I have been running a BR6ES plug in my '86 yz 125. No plug issues.

On my '97 WR250 (two stroke) I had to go to a BR6ES to stop the plug fouling.

Rod

 

whenfoxforks-ruled

Old MX Racer

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Oct 19, 2006

8,129

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Merrillville,Indiana

• May 28, 2009

• #9

You read the plug. Heat range comes from the porcelain. Timing from the electrode. Main jetting from the very top of the porcelain, you really have to cut the threads off, or get a good viewer.

 

J

_JOE_

~SPONSOR~

May 10, 2007

4,697

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• May 28, 2009

• #10

But most trail riders spend little time on the main. Lots of guys have plug fouling issues and start dropping main jet sizes only to keep fouling plugs from an excessively rich needle position or pilot jet. Running a hotter plug can sometimes band-aid the rich jetting.

 

whenfoxforks-ruled

Old MX Racer

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Oct 19, 2006

8,129

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Merrillville,Indiana

• May 28, 2009

• #11

Very true Joe. I would bet most could plug the main off without issues. BUT, changing the main is the easiest? If he reads the link on how to jet, and read the plug, he will likely find some other mechanical issue altogether!

 

G

gr411

Member

Feb 8, 2009

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• Jun 1, 2009

• Thread starter
• #12

wow i got the answer i wanted thanks a mill guys

 

G

gr411

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Feb 8, 2009

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• Jun 5, 2009

• Thread starter
• #13

hey RMC what do you all have on your 86 125 just so i can figure out if that plug will work good with my problem