Please help - detailed instructions on removing/bypassing a50 emissions system

[MN_Scoot]

I have done multiple searches here and elsewhere about removing the emissions system…seems to be the last thing I can try to do to solve my WOT stalling out problem.

The instructions I have seen have slightly different emissions systems, so wanted to make sure I do this correctly with the Agility by posting photos. Can Anyone tell me exactly what I need to do to remove or bypass this system?

There are three hoses coming from the canister under the floorboard. I've labeled each in the photos below:

Has doing this solved anyone else's stalling out problems? Appreciate any help! I've cleaned or replaced almost every other system trying to get the a50 to stop stalling out.

[BettinANDlosing]

Cool, easy job. Next time I do one, I'll make a detailed write up with pics but for now:
A) first pic, cut that large hose and block with a bolt or rubber stopper. (If your feeling ghetto a larger spark plug works great) Done
B) completely remove the large cylinder canister and cut the lines going to it.
C) the "T" that goes to the canister, intake, and petcock you need to re-design so that it goes just from the intake, to the petcock (pro tip you have multiple feet of extra vacuum line from taking the canister out, use it!!!)
D) take the gas tank one way vent off, and route the line from the gas tank vent somewhere clean and out of the way.
Double check that you vacuum line goes just from the intake to petcock, and they are nice and snug. Make sure that you route the gas tank vent slightly ABOVE the level of the gas cap, so in the case of an over-fill it dosent gush out that hose. If you get lost doing it, feel free to post up more pics and I'll walk you through it.

[MN_Scoot]

D) take the gas tank one way vent off, and route the line from the gas tank vent somewhere clean and out of the way.
Double check that you vacuum line goes just from the intake to petcock, and they are nice and snug. Make sure that you route the gas tank vent slightly ABOVE the level of the gas cap

Awesome, thanks for the great detail!

The only thing throwing me off is D. Others have mentioned the gas tank vent and unless it's buried in the very back behind the taillight assembly, I'm not sure an Agility has that. I even took the body panels off yesterday to try and find it, but the only things I saw coming out of the Agility's gas tank was the petcock at the bottom and the fuel gauge wires at the top. Could the Agility possibly deviate from other models and have only a small hole in the gas cap as a vent?

[BettinANDlosing]

They are required to vent the fuel vapor into the charcoal canister, EPA bull crap. Anyway, it might be buried in the tail like you said, and is the least important to take off. It SHOULD have a line going from that charcoal canister, to the gas vent.

[MN_Scoot]

They are required to vent the fuel vapor into the charcoal canister, EPA bull crap. Anyway, it might be buried in the tail like you said, and is the least important to take off. It SHOULD have a line going from that charcoal canister, to the gas vent.

Thanks again, for the response! Agilities apparently don't have the vent to canister hose like other models.

I just found this video that where the scoot seems to have the same exact three hose-to-canister system as me. This guys goes so far as to weld a custom piece in his process to remove the emissions system. You think that's unnecessary? I believe you suggested closing off that section by sticking the rubber stopper into the valve cover in step A of your instructions. I assume that accomplishes the same thing?



Sorry to ask so many questions. I just really want to solve my stall problem once and for all. Getting tired of pulling off panels to troubleshoot!

[BettinANDlosing]

That large hose coming off the cylinder head is for the exhaust gas recirculation EGR. You can do whatever you like, it just needs to be totally blocked off some way or another, easy to just jam a bolt or something in there, I wouldn't go as far as to plastic weld and all that junk.

[MN_Scoot]

Thanks again for all the advice! Just curious, how much worse are these bikes now emissions-wise after removing this system. I know it's small in the scheme of things, but the extremely low carbon footprint of a scooter is part of the draw/fun for me.

Too bad these systems seem to cause so many problems. It sounds like all who do this think it's very worth it in how the bike runs afterward.

[BettinANDlosing]

Thanks again for all the advice! Just curious, how much worse are these bikes now emissions-wise after removing this system. I know it's small in the scheme of things, but the extremely low carbon footprint of a scooter is part of the draw/fun for me.

Too bad these systems seem to cause so many problems. It sounds like all who do this think it's very worth it in how the bike runs afterward.

I hate to bust your bubble but the only thing a scooter uses less of is gas, emissions are MUCH higher than modern cars. http://carbonpig.com/article/motorcycles-create-more-greenhouse-gas-emissions-suvs
Less gas is the draw, motorcycles and scooters pollute like MOTHERf***ERS. They actually banned scooters in the most dense city's in China because the pollution was so bad. Most newer motorcycles are getting better, with efi and catalytic converters and everything, still worse than a new car. You don't even want to see the chart for two strokes, it's terrible. Particulate pollution is especially bad, it's the main reason for smog, and the particles travel far and wide. I was watching a documentary and some scientists were studying the soot later in Antarctica from mostly diesel, which emit particulate like 2t. Some spots had an inch later of diesel soot (i would imagine coal too). Anyway were doing our part to save gas, lighten congestion, lighten the abuse the roads get, and best of all its just fun!!!

[wkreps]

. . . and what are the real world benefits of doing this?

[MN_Scoot]

I hate to bust your bubble but the only thing a scooter uses less of is gas, emissions are MUCH higher than modern cars. http://carbonpig.com/article/motorcycles-create-more-greenhouse-gas-emissions-suvs
Less gas is the draw, motorcycles and scooters pollute like MOTHERf***ERS. They actually banned scooters in the most dense city's in China because the pollution was so bad. Most newer motorcycles are getting better, with efi and catalytic converters and everything, still worse than a new car. You don't even want to see the chart for two strokes, it's terrible. Particulate pollution is especially bad, it's the main reason for smog, and the particles travel far and wide. I was watching a documentary and some scientists were studying the soot later in Antarctica from mostly diesel, which emit particulate like 2t. Some spots had an inch later of diesel soot (i would imagine coal too). Anyway were doing our part to save gas, lighten congestion, lighten the abuse the roads get, and best of all its just fun!!!

Ha, yeah, my bubble was burst long ago.

I read that viral article a few years back about scooters polluting more than Hummers, but it was very quickly discredited by the way they set up their argument (they used a two stroke which are definitely the minority these days) and they mentioned nothing of the total carbon footprint. I agree that 4 strokes are still not great compared to cars with catalytic converters, buuut there is still a large argument to be made about total carbon footprint and product life cycle from creation to disposal. Obviously those cars do a ton of catching up there.

That said, I guess I was just curious if anyone knew if removing the emissions canister made a huge difference or if it was a negligible difference. I know I've wasted a lot of gas driving to auto parts stores in my car when the scooter is not running correctly (likely due to that damn system).

[BettinANDlosing]

Better idle and starting, and slightly more power. The emission system dumps fuel vapor and exhaust gas back into the engine and re-burns it. Good for emissions, bad for performance. I noticed a big difference in idle quality with the system removed.

[MN_Scoot]

Cool, easy job. Next time I do one, I'll make a detailed write up with pics but for now:
A) first pic, cut that large hose and block with a bolt or rubber stopper. (If your feeling ghetto a larger spark plug works great) Done
B) completely remove the large cylinder canister and cut the lines going to it.
C) the "T" that goes to the canister, intake, and petcock you need to re-design so that it goes just from the intake, to the petcock (pro tip you have multiple feet of extra vacuum line from taking the canister out, use it!!!)
D) take the gas tank one way vent off, and route the line from the gas tank vent somewhere clean and out of the way.
Double check that you vacuum line goes just from the intake to petcock, and they are nice and snug. Make sure that you route the gas tank vent slightly ABOVE the level of the gas cap, so in the case of an over-fill it dosent gush out that hose. If you get lost doing it, feel free to post up more pics and I'll walk you through it.

Going to finally do this tonight. One final question. Since we already plugged off the large hose coming from the emissions canister to the bottom of the valve cover (your point A), do I still leave this smaller hose (pictured below) connected to the top of the valve cover and leading to the airbox?

[BettinANDlosing]

Yes, the small hose at the top of the valve cover is the crankcase breather and it NEEDS to get fresh clean air from the airbox, just leave that as it is Good luck man, post up with any questions.

[MN_Scoot]

Yes, the small hose at the top of the valve cover is the crankcase breather and it NEEDS to get fresh clean air from the airbox, just leave that as it is Good luck man, post up with any questions.

Thanks again!

[BettinANDlosing]

Thanks again!

No prob, you get everything ok?