Originally Posted by
Chadstrotheide
I have just bought a b5. About two months ago. Installed it. Broke it in at stock settings. Took it to the track leaned it out around 1/2 to 1 turn on the main."flush or a hair in" And about 1/4 turn on the slow.The motor ran great for one quart of fuel. "Bryon 30% nitro 11% oil". It will fire up and idle. And run when it's cold. But right after it warms up. It will not idle. And dies after giving it 1/2 throttle or more after releasing the throttle? The motor has less than 3/4 of a gallon through it. I haven't ran it to lean. One of my friends is having problems also. This motor has everyone shaking there heads.... On what to try. With all the hype on this motor. It has just turned into a huge disappointment. Any ideas? Any warranty on the b5?
Are you running the 2010 carb or the older version. If its the 2010 carb it tunes a lot differnt. It runs way leaner than the older version. If its the 2010 your way fat thats why it will run cold and not after it warms up. You want no gap at Idle with the restictor in. At least 2 turns in on the high and at least a turn and a half in on the low from flush. Start here and tune from there.