atp turbo xs1100

[SeaAtp1100]

That lambda sensor position is questionable. If that pipe is shoved into the mufflers and not sealed or welded it will give false readings as it will suck in fresh air when off throttle (or idling).

I’d rather be too rich that too lean, false readings if it’s not sealed tight I still compensate by going richer . It’s just a temporary set up to take on the road so I can figure out the needle position and main jet. At idle I wrap a towel at the joint for a reading. It gets me in the ballpark before $180 a pop dyno pulls. I only have to do 1 or 2 pulls instead of 3.

Got me pretty close the last time. If I recall correctly I had to go down 1 size on the main, pilot and needle position were correct on this rz350

[Mathh]

I’d rather be too rich that too lean, false readings if it’s not sealed tight I still compensate by going richer . It’s just a temporary set up to take on the road so I can figure out the needle position and main jet. At idle I wrap a towel at the joint for a reading. It gets me in the ballpark before $180 a pop dyno pulls. I only have to do 1 or 2 pulls instead of 3.

You're thinking in the right direction, you'll get there, good luck!

[SeaAtp1100]

Ended up brazing the advance I don’t have access to a mig welder anymore

[SeaAtp1100]

Looks like it’s gonna fit, even have room for getting at the choke

[DEEBS11]

That area is going to be very hot. I worry about the plastic choke pull and cable pulley. Although they are probably a type of thermal plastic.

[SeaAtp1100]

If the carb was mounted to the other side of the turbo it would melt for sure

Here’s the side cover right next to the hot side of the turbo, if it was that hot I’d expect it to be droopy after all these years.

[SeaAtp1100]

Now you have me looking deebs. The regulator sits right above that turbo the ground wires to it are close to the turbo, no sign of anything getting too hot. I don’t think there’s anything to be concerned about because heat isn’t getting trapped like from a hood on a car.

[DiverRay]

Remember, the turbo is only producing excess heat when boosting pressure. This is when the bike is moving, so you have airflow over the turbo and the "soft" parts near it. Having owned a 650 Seca Turbo back in the day, I can say boost is very low under most driving conditions. And yes, I did have the 12psi boost kit on the bike.

[DEEBS11]

Ray, I had one of those. Some guy gave it to me in poor shape and I rebuilt it. I locked the wastegate so the poppet valve opened at 12 pounds. I think I remember using safety wire. It was a cool bike. Carbs were special because of the blown-through turbo. All sealed for pressurization.

[DEEBS11]

Carb work.

[DEEBS11]

This is what I drained out of the crank case. All water. Flushed it with cheap oil and kerosene. Got it hot and dropped the oil a few more time. Thing ran great. Lot's of fun.

[DEEBS11]

I sold it to this guy. Saw him on it for a few years afterward. I love seeing something that should be dead, alive and kicking for many years to come.

[DiverRay]

Mine was repainted by me, but killed a few months later. Guy getting on to the freeway clipped the car in front of me, and I ended up hitting the passenger door of his car before being pushed by the car behind me. Walked away, but the bike was beyond saving. First of two bikes hit on the freeway with me riding them, and neither was my fault....

[DEEBS11]

You are lucky to be alive.

[Steverk]

This thread is aging somewhat. In addition to the timing issue that can be an engine killer with a turbo, you should be very concerned with sufficient end gap on the rings if you're running a stock setup.