05 blaster, is graying plugs....

[Copenhagen_boy]

Not sure how else to really put it.. smells kinda fouled and is medium gray in color, but fires fine.. any imput?

 

[Blaaster]

If you are in any doubt about what is causing that plug colour, you need to perform a plug chop.

 

[Copenhagen_boy]

What is that and how would that tell me anything? what is that, what does i do an how will that alone tell me anything lol

 

[Copenhagen_boy]

Oooohhhhhh

 

[bansheedave]

I would look down the cylinder with the plug removed and the piston at TDC and check to make sure your piston isn't melting away. sounds to me like it is pretty lean. or even pop your pipe off and look at the edges of the piston on the exhaust side and see if it is loosing metal.

 

[Copenhagen_boy]

It looks baby smooth

 

[bansheedave]

thats good. the grey plug has me worried

 

[jus_me]

Whats your mods and what jets are in there now? grey is lean..

 

[Copenhagen_boy]

Bored .20 over with wiseco piston, v force 3 reeds and full pro circuit exhaust

 

[Copenhagen_boy]

Not sure about the jetting

 

[Blaaster]

What other mods to the intake side, air filter, airboxlid off, premix at what ratio.

 

[Copenhagen_boy]

Stock air filter, lid on, 32;1

 

[jus_me]

If you keep riding it like it is you will blow it up.. Pull the carb and see what's in there. report back..

 

[Blaaster]

#270 - #280 main jet, plug chop to confirm.

 

[Copenhagen_boy]

How do i tell what size the jets are?

 

[speedyslyder]

there are numbers stamped on them, might be hard to read though,you should buy a few just to be sure,they are cheap

 

[Copenhagen_boy]

Are they in there with the bowl? I just called a shop and they said to go up in size if its running lean

 

[jus_me]

Yes. they are in the bowl. they are brass. Im trying to find you a good diagram.. Lets focus at 1 at a time for now.. the main jet.. its in the bowl it is hexagonal in shape and it should have a number stamped right on it , whats that number? there should be a plastic splash guard around it.. sometimes the splash guard isn't there though.. that jet will unthread from the carb you can take it right out, just don't lose the brass washer under it..

right in the middle there..
http://yamahablaster.info/wp-content/uploads/2010/08/How-to-rejet-your-carb-the-quick-way-2.jpg

 

[Copenhagen_boy]

Ill have to do it tomorrow or in a few days

 

[speedyslyder]

make sure you got a small flat head screwdriver

so you can take out pilot jet and soak it in carb cleaner. i use these.