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losing power when throttle is fully open


magnerslol

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Okay......breathe man. Jetting is not hard to change. You have to take the carbs tops off (there is a gold colored lock/screw on the side holding it on from loosening) then. You will needed to remove the fuel lines and the 2 long vent tubes running to the ground. IF your bike still has the TORS (throttle override system) there will be big ass clunky boxes on your carb tops.

 

Next......ONE AT A TIME....remove the 4 screws on the bottom carb bowl to access the inside. There will be a large black float that you will see and a hexagon shaped goldfish colored MAIN JET. This is what needs to e changed. Also look inside one of the small holes and you will see a small gold jet down there....this is your pilot jet........unscrew it and change it.....usually FMF pipes like 27.5 pilots.

 

When the guys are saying your lean/rich they are not referring to your amount of oil mixed with fuel. They are referring to whether your motor is getting enough fuel or too much fuel. With those pipes and stock jetting you are most certainly starving the bike for fuel (running lean) which is why it's falling on its ass up in the rpm.

 

You need to know what altitude your location is at in order for us to get you close to your correct jetting.....as jetting all depends on amount of air/fuel your motor can breathe in. The higher your location is in altitude the less air molecules there are per any given volume so you need less fuel to mix with the air......this is why we need to know your altitude.

 

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Here is a great vid for plug chopping to determine where your main jet is at. If its black its too rich, if its grey its too lean. If its a brown mocca color its gravy.

 

 

This vid shows where the main an pilots are on your carb.

 

A good rule of thumb: The pilot controls your idle to say 20-25% of your throttle. The needle controls 25%-90% of throttle. The main controls throttle at wide open or WOT. (wide open throttle)

 

Every time you make a modification change you change how much air and fuel your motor will consume. If you put larger pipes on it you will need more fuel and air. Therefore you will have to go to a larger jet. What no one else talked about was air temp. When you air temp drops the colder the air is and the more dense it is. More air, need more fuel. Every 10 degrees you should go up one jet size. Humidity will also have an effect.

 

If you dont know the answers to your questions you can find the majority of the answers just by searching this website. If you can't find them here then look on a google search.

Edited by turbowrenchhead
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