Jonway 150cc exhaust header broke today...

[AtlScooterguy]

I was riding home today and I noticed my scooter got super loud but I was almost home, I get home and notice that the exhaust header ( I think that's what its called, not sure) had broken off from where it connects to the engine:no:. I have no idea how it happened but Im going to just order a whole new exhaust, I have been wanting a new chrome one. I was just wondering do these come in different sizes for 150cc gy6 scooters or what? My scooter is a 2013 Jonway yy150t-21. Any help would be appreciated. http://imgur.com/bzoS01h http://imgur.com/zhx2ssk http://imgur.com/iwOLQ0o

[kz1000st]

You need the two piece system. Scroll down to the GY6 pipes.

http://www.partsforscooters.com/Street-Scooter-Exhaust-Performance

Like this for instance.

http://www.partsforscooters.com/125-150cc-Carbon-Fiber-performance-pipe?sc=34&category=132557

[AtlScooterguy]

Ok thank you. I was thinking last night and I was wondering if maybe I should just order a header pipe for now just to get me back on the road. I found this chrome one for gy6 150 so Im guessing that means any gy6. Do you know if this would work? http://www.ebay.com/itm/SCOOTER-150CC-GY6-OEM-CHROME-EXHAUST-HEADER-WITH-NCY-GASKET/181556174401?_trksid=p2054897.c100204.m3164&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%2 6asc%3D20140407115239%26meid%3Db5538d6f54064df0a83 7c5e3fcdda6dc%26pid%3D100204%26prg%3D2014040711523 9%26rk%3D1%26rkt%3D30%26sd%3D171501058178
I still plan on upgrading my exhaust but i'm kinda short on money now. The header is only $32.

[kz1000st]

I would think that would work. Look yours over and make sure the bends match. It should. There are only a couple of GY6 150cc styles. The other one is a one piece muffler/header and you don't have that.

[AtlScooterguy]

Well I have the new pipe on but my stock header has some hose coming from it near the engine, the new one doesn't. I couldn't get the hose off the old one so I cut it as close as i can. None of the header pipes I have seen online have the little hose thing on it. My question is what does the hose do and what should I do with it now? Its not connected to anything. I haven't tested it out yet because my battery was almost dead and i'm charging it now.
http://imgur.com/UoDimTB
http://imgur.com/F0JWdqV
http://imgur.com/b3Xw1iY

[AtlScooterguy]

Well it's running fine now but I would still like to know whats up with that hose. Thanks in advance.

[rks]

The hose is part of the emissions system on your scooter. The other end attaches to the air box snorkel...should be removed, and replaced with a vacuum cap, or at least plugged with a bolt and small hose clamp. This will keep unfiltered air from being sucked into your engine. 1st photo is before removing, 2nd is after..

http://i1271.photobucket.com/albums/jj622/rks3526/000_0365-1.jpg (http://s1271.photobucket.com/user/rks3526/media/000_0365-1.jpg.html)


http://i1271.photobucket.com/albums/jj622/rks3526/000_0374-1.jpg (http://s1271.photobucket.com/user/rks3526/media/000_0374-1.jpg.html)

[AtlScooterguy]

It just started to stutter/bog/act like it wanted to cut off or something. I'm going to plug it and try it again. Hopefully that will work out.

[AtlScooterguy]

I plugged it and I still get the same problem. Not sure what's going on.

[kz1000st]

You have a vacuum leak somewhere. Probably related to this pipe change. Start the scooter and listen carefully around the engine. If you hear a hissing sound, find the source. I had a similar problem years ago and it was a bad relief valve open to the air pulling vacuum. I plugged it and all was well.

[AtlScooterguy]

That's been my main problem all day, I been trying all day to get it started back up I got it to start one time but it wouldn't idle it would only stay if I gave it a little bit of gas and it was still boging every time it hit about half throttle or less. I didn't have it on long enough to hear any air leaks. I always have a hard time when it gets colder but never this hard. I will try again later i'm letting the battery charge again.

[AtlScooterguy]

Still doing the same thing but I think I figured it out. I seen smoke coming from where the pipe connects to the muffler. Once it cools off i'll try to tighten the bolts more to see if that does it. I have it on video here. https://www.youtube.com/watch?v=WY4WAuxxn5g&feature=youtu.be

[AtlScooterguy]

I have not got it started up since the video.