Another speedster question

[Gary pope]

Ok I am at my wits end with this thing.... I put a new motor from sbt in her, that one works just fine....the other one however acts like it's bogging down and you can smell gas real bad, plugs are a tad bit dark.... I did rebuild all carbs with mikuni kits.... I just don't get what's going on...

 

[Seadoodoc]

Pull filter lids and screens off.. look in carbs while running. Look to see one carb is dribbling fuel.

 

[Gary pope]

I'll check on that later. The funny thing is it will idol fine but when you go to give it gas past half throttle that's when it bogs out.

 

[Seadoodoc]

Bogs out term is really kicking the elite trouble shooters. Two terms used in our world are "gasp" stutters then goes. Thats a lean condition. Sputtering is rich condition. I presume a "bog " description means its running on one cylinder . Wont break plane?

 

[Gary pope]

Exactly one motor runs great and that will barely break plane but I can only do maybe 30 miles an hour. The other motor you go from half throttle it's running OK then when you go to full throttle that's when the bog takes place and it seems to be only running on one cylinder in a strong smell of gas

 

[Steelmesh]

Swap carbs and see if the problem moves to the other engine?