Cool thank you everyone for all the help I will try the 32:1 ratio but for now I'm just going to take the bike back and have the dealer fix it since its still under warranty. Thanks again. One more thing what kind of higher heatrange plug should I get "Six2notScaredofU"

 

We just bought a banshee we were told to use 16oz to 5 gal. Is that ok?

 

go and get a ratio rite or something like it to take all the guess work out of premix.of the top of my head i think thats a 40 to one ratio i could be wrong though.also what kind of oil are you using?

 

Check the tube that runs from the left carb to the right carb. Not the one that you would replace when you put a boost bottle on but the vaccuum tube that is smaller used the connect the two carbs together for the choke. Mine did the same thing and it was that tube came off and wasn't choking the right carb.

 

That is definitely a rich mixture. The manufacturer always recommends an overly rich mixture to protect the engine and avoid damage claims etc. The prefer you have a more sluggish hard starting engine over a damaged engine. Go with the 32 or 36 to 1. That rich mixture will definitely foul plugs especially if you are going easy on the bike for a little bit. It would only burn clean enough under hard accelerating and higher rpm's. Idling is a sure no no at this rich mixture. The starting at half choke is another sign of things astray. Very possibly from that oil ratio also. Change your plugs and use the higher (really normal though) mixture ratio and it should start easier for you. If not then check the jetting. Read the color ofthe plug. Should be tan. Also check the float height. May be rich. Yamaha is notorious for improper float heights right out of the crate.

 

Oh yea, let's take the guess work out of the conversions here on mixture ratios. One says 32 to 1 another is asking is 16 oz. to 5 gallons ok. Here is the answer/formula to do it yourself. Simply put. One gallon of gas equals 128 ounces. Multiply that X 5 gallons. 5 X 128 = 640 ounces. 640 ounces divided by 16 oz. = 40. 640/16=40. That means the ratio that dealer recommended to you is 40:1 or 40 to 1. Another way to use this formula. Maybe you want to mix 3 gallons. 1st convert that to ounces.
3 gallons times 128 ounces per gallon = 384 ounces of gas. You want to go with say... 36 to 1 mixture ratio. Ok, just divide 384 ounces of gas by 36. 384 / 36 = 10.67 ounces of oil. Mix 10.67 ounces(11 oinces is good hehe) to that 3 gallons of gas. Last example kids. You have a chain saw that uses 40:1 mixture. You only want to mix up a half gallon because it is a small saw and you only have a small bit of cutting to do. Hate to waste the unused gas knowing it will spoil in a month. 1st convert! (new golden rule). convert half gallon to ounces. 128 ounces divided by 2 = 64 ounces. 1/2 gallong of gas = 64 ounces. Now divide the 64 ounces by the desired mix ratio. 40. So 64 ounces divided by 40 = 1.6 ounces of oil ti mix into that 1/2 gallon of gas and knowing this I imagine a larger amount just to justify this amount in my head to verify my mixture seems ok. Better to calculate twice than burn the engine once! So as a check I'll take that 1.6 oz. to the half gallon (sounds kinda abstract that way and makes me uncomfortable) and double it to a full gallon meaning I also double the oil amount. According to my formula 1/2 gallon requires 1.6 oz. so 1 full gallon would require 3.2 oz. Now 3.2 oz. to the gallon is a familiar number to me from the past. My weedeater uses that. Ok. I know I did my math correctly and my chainsaw is safe. Hope this helps and please double or triple check your math.

 

that was it the choke tube between the carbs thanks zorro my shee runs great now

 

Glad to help.