850T Running. Sort of. With video. Update with new video! Now with ride video!

[n3303j]

How come the owner doesn't want to run a compression check on this engine? If compressions aren't up and relatively equal he is wasting all his efforts playing with carbs or any other setting in an attempt to make the engine run smoothly.

[Triple Jim]

Ha, I can't even get him to feel the head pipes.   

[Tom]

Ron....ask him.  He's on the thread.

[fotoguzzi]

after thought.. does an 850T have chrome bores? flame on..

[n3303j]

Ron....ask him.  He's on the thread.

I've brought up "basic procedure" 3 times and can't get a response. I used to train technicians in troubleshooting. First step was always check base settings before you try to fine tune performance. Some people just choose to ignore the basics and then wonder why they can't get the hoped for results. When I see this is the case I stop directing my efforts toward helping them solve their problem.

[swooshdave]

Head pipe are fine. Nice and warm.

Idle circuit is clogged again. I'll pull the carbs again and look at those.

Runs like a raped ape at 3+k rpm.

Video later tonight.

Thanks to everyone for the advice. Yes, I know the right thing to do would be to tear the whole bike down, replace the cylinders and throw away the Bub sump. And the in a couple years ride the bike.

And maybe I'll do that in a couple years. 

In the meantime I'll sort the carbs and ride it.

[Triple Jim]

So you started it cold and got it idling, and the head pipes warmed up equally quickly?

[swooshdave]

So you started it cold and got it idling, and the head pipes warmed up equally quickly?

Yes. Idled just fine. Rode around the neighborhood a bit but then the idle thing acted up again. Runs spectacularly above idle.

[Matt]

after thought.. does an 850T have chrome bores? flame on..

 
For some reason the dead horse emoji won't work for me.

Miss me DRs, had a 200 ($500 flip for $1700) and 650. Both would be welcomed back with open garage doors.

[Triple Jim]

The chances of having both carbs develop idle problems at the same time are slim.  That's the purpose of a quick and easy check of exhaust temperature while it's acting up... to know which carb is the one causing the trouble.  I don't understand this fear of getting burned.  I can check the temperature of my wood stove by wetting my finger with spit and wiping it across the flu pipe very quickly.  But in any case, I'm sure my harping is not welcome at this point, so I'll leave it to others.

[swooshdave]

I need to let the bike cool down first and it's too late to be firing up the bike. I've got kids to get to bed and dishes to wash.

Or else you-know-who gets upset. 

I'll give it another try tomorrow. Stay tuned. Plus I've got the GoPro video to post.

In the meantime I need to figure out where the idle circuit is on these funny square slide carbs...

[injundave]

In support of Triple Jim, if you start the bike from cold and lightly touch the exhausts, you can quickly tell if one pot is working and one not because the one working gets warm and the other stays cold. You don't have to grip the pipes until the skin on your hands melts, just a fleeting touch to gauge temperature is enough.

Tips like this usually come from experience and years of use and are always worth listening to because they WORK.

Anyhow, you can lead a horse............

[swooshdave]

In support of Triple Jim, if you start the bike from cold and lightly touch the exhausts, you can quickly tell if one pot is working and one not because the one working gets warm and the other stays cold. You don't have to grip the pipes until the skin on your hands melts, just a fleeting touch to gauge temperature is enough.

Tips like this usually come from experience and years of use and are always worth listening to because they WORK.

Anyhow, you can lead a horse............

Did I at any point not say that wasn't a good idea? I mean other than joking about the oven mitts? I'll get to it tomorrow. I'm busy right now. 

[swooshdave]

Ride video!

https://youtu.be/pus10N9ABBI

I was so excited I didn't take the camera the first ride. It's still got a low speed miss. I'll dive back into the carbs to try to figure out why. After cleaning the carbs the first ride was fine but by the second time it came back. Above it it just rips.

[swooshdave]

In support of Triple Jim, if you start the bike from cold and lightly touch the exhausts, you can quickly tell if one pot is working and one not because the one working gets warm and the other stays cold. You don't have to grip the pipes until the skin on your hands melts, just a fleeting touch to gauge temperature is enough.

Tips like this usually come from experience and years of use and are always worth listening to because they WORK.

Anyhow, you can lead a horse............

The left side is cooler.

[Moto]

The Moto Guzzi factory Work Shop Manual, p. 32, says [regarding the T]: "To adjust drive screws -D- fully home and then unscrew them from 1 1/2 to 2 turns for the L/H carburettor and from 2 to 2 1/2 turns for the R/H carburettor."

Moto

[Tom]

Thanks Moto.  Now I don't have to look it up.    I knew the info was out there.