Im a nobbie ... engine troubles, idle,lean

[isthisreal1991]

i have the 66/80 cc slant head, about 1400 miles running 30:1

ive always really had the problem of after 4 mins of running and its warmed up i cant WOT i can pull throttle to 60 % but thats about it after that it just boggs... also i am running lean and cant seem to adjust the mixture i have the upgraded carb with no primer it has one idle screw and 2 small screws im assuming for the mixture.. i dont know how to tinker and i also dont know how to adjust the needle in the carb.... please help... ohhh also i can never get an idle messing with the screw on the side of chain does nothing.... ugh please help i dont know if it matters but im upstate NY 1000ft above sea level and its around 30-50 degrees recently... oh and also i have a tight seal on the head and im getting oil comming out of the front of head and spark not alot but noticable after 15 miles

 

[biknut]

If the oil is coming out of the spark plug hole, that's not too big a deal. If it's the head gasket you'll need a gasket, and a torque wrench to install it.

The CNS carbs run lean, so you'll need to either get a bigger main jet, or drill out the one you've got.

http://motorbicycling.com/f34/omg-i-have-tune-cns-help-30169.html

 

[isthisreal1991]

Thanks for the reply I apreciate... I dont have a drill so I can't drill it any other ideas

 

[Greg58]

Biknut is right about drilling the main jet, you can buy a set on e-bay if you want. Try the link below to see what you will need, a hand held drill works great.

21pc MINI-DRILL Set INDEX 61-80 w/Aluminum Hand Drill | eBay

 

[Al.Fisherman]

If the oil is coming out of the spark plug hole, that's not too big a deal. If it's the head gasket you'll need a gasket, and a torque wrench to install it.

The CNS carbs run lean, so you'll need to either get a bigger main jet, or drill out the one you've got.

http://motorbicycling.com/f34/omg-i-have-tune-cns-help-30169.html

Mill the head would also help. How to is here....
https://docs.google.com/document/d/1GcesQihc7-mm3hJGf7UPiqOaRXZ8ekUT99QUZq2qXXE/edit

 

[isthisreal1991]

Biknut is right about drilling the main jet, you can buy a set on e-bay if you want. Try the link below to see what you will need, a hand held drill works great.

21pc MINI-DRILL Set INDEX 61-80 w/Aluminum Hand Drill | eBay

I cant get ahold o a drill till i get paid next week but how do i drill it out haha im sorry like i said i am a little bit of a noob but i want to ensure i do it correctly cant afford to render it usless its my ride to work haha

 

[biknut]

I cant get ahold o a drill till i get paid next week but how do i drill it out haha im sorry like i said i am a little bit of a noob but i want to ensure i do it correctly cant afford to render it usless its my ride to work haha

You don't need a drill, just the drill bit. You can turn the drill bit with your fingers, or plyers.

 

[Greg58]

The little drill set on e-bay is only $6.25 shiping included, will work good on brass jets. I bought one kinda like this on amazon, be sure to mic the bit to make sure you are using the correct drill. Small bits look about the same.

 

[isthisreal1991]

You don't need a drill, just the drill bit. You can turn the drill bit with your fingers, or plyers.

Okay i didnt know that lol good to know so im sorry to bother you but could you explain to me how to do it , like what size to use and how to get the jet out? i'd really appreciate it!!

 

[biknut]

Okay i didnt know that lol good to know so im sorry to bother you but could you explain to me how to do it , like what size to use and how to get the jet out? i'd really appreciate it!!

Start with about a #66. If that's still too lean try a #64

 

[isthisreal1991]

Start with about a #66. If that's still too lean try a #64

thank you ill try and figgure out how to get the jet out on youtube