Exhaust can for Qingqi QM200GY (aka Qlink, etc)

[firefightermatt]

I never had a canister under my seat like you do...I was going to ask you what that was. I have never seen that on anybodys XF200 on here.

[david3921]

I couldn't find in the manual that is posted elsewhere on this site. I'm guessing it has to do with emmisions. I will trace the hoses and see where they go. I did notice that there are two outlets on it that have no hoses. You can see one of them in the photo. I wonder if I got some sort of "California" model.

What do you think it is forchetto?

[forchetto]

What do you think it is forchetto?

I wondered about that, as mine doesn't have it either. My Virago California model has the left hand "blister" on top of the engine full of similar gubbins. It shows them in the workshop manual but mine doesn't have them. It's some sort of charcoal filter where the gas tank vents its hydrocarbon fumes and then they get shoved into the intake manifold at certain engine vacuum conditions. My car has that as well.

[firefightermatt]

Well my bike is California emmisions compliant and its doesnt have it so I dont think it has anything to do with that. Its does look like some sort of charcoal canister but I wouldnt know why it is on there...maybe the state you live in has a requirement for it on motorcycles.

[david3921]

I moved the strap up on my exhaust today. I did have to add some rubber bushings to keep it away from my tire, though. All is good there.

Now for that canister thing. I took off the gas tank so that I could see the routing of all of the lines. Here's how it all goes;

The gas tank vent (under the tank) goes to a check valve. This can be seen in my third photo, just right of the canister.

A hose goes from the check valve to the canister.

Two hoses come out of the canister. One is small the other large.

The large one goes to a "T". One side of the "T" goes to the air box, the other to the SAI. Matt's and forchetto's large SAI hose went to the airbox.

The small hose also goes to a "T". One side of the "T" goes to the carb, the other to the SAI. Matt and forchetto's small SAI hose went to the carb.

I'm thinking that since my bike is a newer model (bought a few months ago) it might have more stuff added to comply with tougher standards. Matt thought that maybe it's because of the state I'm in. It's Michigan and I've never know this state to have very high standards when it comes to anything automotive. We don't even have inspections so there is a lot of junk out on our roads.

Before I think about taking all of this off, I would like to know how the gas tank vent is hooked up on your bikes. Does it go to a check valve? I remember Volksjagger having trouble with his bike and said it had something to do with a vacuum lock at the gas tank. I'm guessing it had to do with vent.

[forchetto]

I remember Volksjagger having trouble with his bike and said it had something to do with a vacuum lock at the gas tank. I'm guessing it had to do with vent.

I remember Volksjagger's troubles too. It was never made very clear what the trouble had been. I just assumed he meant the vacuum line from manifold to the SAI valve, but I did wonder what that had to do with fuel starvation...now I realise that your device is part of the tank breather and that CAN affect the fuel supply. Bikes without that device just vent to atmosphere through the gas cap.

[david3921]

Forchetto and Matt, do both of your tanks just have the cap for vent or is there an under the tank tube like mine?

[forchetto]

Forchetto and Matt, do both of your tanks just have the cap for vent or is there an under the tank tube like mine?

Mine just vents through the gas cap. It has a little ball valve on it to prevent petrol coming out if you turn the bike over.

[firefightermatt]

Not sure how mine vents...I guess through the cap. Its doesnt have anything coming out from under the tank other than the supply line.

[david3921]

Thanks guys. I can see if I want to take all of the stuff I'll have too at least leave the tank vent check valve on. I think I'll leave it all on for now. I've got what I want performance-wise for now with the exhaust and the jetting. I did change both sprockets (16 front and 44 rear) a few weeks back but it's been so cold here I haven't been able to test it out too much. I did notice significant changes in RPM after each sprocket change with the little riding I did do, though. I'm looking for high MPH with some performance. Right now, I'm in the process of changing the headlight. Just can't get past the bat-cycle look. Looking at both square and round applications. I'll post pictures when it's done.