Yamaha Dirt Bikes Forum

hey, basically im an amauter, i cleaned my carb with air gun etc and just wondering how to check jets as the bike keeps fouling plugs. i run a br9eg plug and jets are as wen bought the bike used. just wondering if you could help me jus check the jet settings and tell me were the bits are as all ive seen is the needle lol. also what would be the best oil and ratio to use.. thank you  

I'm not sure about the jets.

But in terms of oil ratio, you should be running 32:1.  
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No pain; No gain

You can go to ProCircuits jetting page and see what standard and recommended jetting specs are?

When was the last time the topend end was rebuilt?
Is the air cleaner clean and not over oiled?
When was the last time the silencer was repacked?  
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I love the Turtle Posse!

 
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No pain; No gain

not sure about topend bought the bike used 2 months ago. Ran fine for 2-3 days then jus keep fouling plugs ever ride. dont have silencer. and all carb and things cleaned throughly with air gun.  

also wots pos on procircuits jet page and is the screw mentioned the air screw... also i know were the needle is jus wondering if the main and pilot are the gold coulered things in the carb and how do i know the numbers and how to set them .  

Not having a silencer is bad. You will need to install a silencer first. If it's used, more than likely it's due for a topend.  
+++++++++++++++++++++

I love the Turtle Posse!

razza90:
also wots pos on procircuits jet page and is the screw mentioned the air screw... also i know were the needle is jus wondering if the main and pilot are the gold coulered things in the carb and how do i know the numbers and how to set them .

They are referring to # of turns counterclockwise from slightly seated on the air screw and the brass thingys are the pilot and main jet.  
+++++++++++++++++++++

I love the Turtle Posse!

razza90:
hey, basically im an amauter, i cleaned my carb with air gun etc and just wondering how to check jets as the bike keeps fouling plugs. i run a br9eg plug and jets are as wen bought the bike used. just wondering if you could help me jus check the jet settings and tell me were the bits are as all ive seen is the needle lol. also what would be the best oil and ratio to use.. thank you

Check and see what jets are in it.  What year is it, what pre-mix and ratio are you using, what type of riding, and how many hours on it as well?  
Dave H 2006 YZ250
(2008 YZ 125 son)

right im improving lol. ive gt 45 pilot, 138 main, nbkf needle. air screw is set at 2 turns. is all this correct...  

also im using sikolene pre mix at 32:1
but ive been advised to change to yamalube 2r at 40:1. while in process off cleaning carb etc. should my fresh batch of gas/oil be new yamalube..
also its 04 model and gets about 4-6 hrs per week ride time..  

razza90:
not sure about topend bought the bike used 2 months ago. Ran fine for 2-3 days then jus keep fouling plugs ever ride. dont have silencer. and all carb and things cleaned throughly with air gun.

Dont have a silencer? That thing must be damn loud!  
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No pain; No gain

wen putting the jets back does the pilot and main just get tightened right up. and also how do you put bavck the needle in valve slide as just the wire is moving with the spring not the needle.. thank you  

Jetting changes to a yz.http://forums.dirtrider.com/70/6729958/dirt-bike-repair-maintenance/jetting-a-2-stroke-carb-keihin-pwk/index.html  
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I love the Turtle Posse!

Sorry Chud but your look was massive, so I made it a little smaller!

Chud's link.  
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No pain; No gain