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Doing me some learning about Chinese scooters.
Posts: 77
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Joined: May 21, 2016 16:17:41 GMT -6
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Post by sillylittleboy on Aug 4, 2016 21:09:22 GMT -6
I posted this on another thread, but felt this is where it belonged, so forgive me for repeating myself.
My exhaust appears to have been through a really tough time. I don't know if it was due to my accident, aggravated by my accident, or just me missing putting locktite on the exhaust mounting bolts/nuts. The side mounting bolt that attaches to a bracket in the middle of the thin pipe portion of the exhaust assembly and then bolts to the side of the scooter - GONE!
The mounting bracket at the back of the assembly (muffler portion) snapped off and the rest I've deduced, because I can't find any documentation, photos, diagrams, of any kind that shows me what is occurring on the underside of the engine where the exhaust attaches.
From what I can tell by feeling around under there AND from looking at replacement parts, I think there are two long bolts (no head on them) on the underside that screw into the head on one end and then run through the intake manifold and are secured using these weird long nuts of sorts (see photo). It looks like I lost one of those weird nuts, so it's rather loose where the exhaust attaches to the engine. Does this mean I probably lost the manifold gasket?
What's the difference between an "exhaust stud" and an "intake manifold retaining stud?" In the pictures the two parts look identical and their usage appears to be the same. I figured I'd order the studs and nuts just in case either of my studs are stripped, although they appear to be solidly mounted to the head, but just missing one nut.
There's a part of me thinking, "Hmmm... this might be a good time to update that weak link of the factory parts and do a performance upgrade of the exhaust. Any suggestions on a good performance upgrade for the exhaust AND does it really give you more... argh... argh... POWER? My weak attempt at a Tim "the tool man" Taylor impression.
I think I've got this all figured out, but wanted to run it by the esteemed panel here. Really wild that I lost one long bolt and a long nut that just loosened themselves up and came off. My accident may have started them down that loose path to fly-off disappearance, but I guess my new mantra is LOCTITE EVERYWHERE!
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Post by rks on Aug 6, 2016 14:31:03 GMT -6
No loctite where the pipe and head meet......much to hot, it will melt and be a better lubricant than retainer. Get a few lock washers at the local hardware store. Make it a habit to have a 10mm socket with you each time you change the oil. You'll be down there anyway for the drain plug......only takes a few seconds more to make sure the exhaust nuts are snug, if that socket is handy.
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Certified Clinician
Currently Offline
Doing me some learning about Chinese scooters.
Posts: 77
Likes: 3
Joined: May 21, 2016 16:17:41 GMT -6
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Post by sillylittleboy on Aug 7, 2016 20:13:41 GMT -6
Excellent idea making it a part of my regular scheduled maintenance AND a part of the PM with the shortest cycle. Thanks! I've already changed the oil twice (before first start and at 100 miles) and fast approaching my third oil change at 1000 miles.
So in spite of there not being any photos or diagrams showing how the exhaust hooks up, I've figured it out. Not that it was Rocket Surgery or anything. Just waiting on the bolts and nuts I ordered, which were supposed to have been delivered on Saturday but got delayed.
They'll be here tomorrow! Woo Hooo!
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Post by cyborg on Aug 7, 2016 20:28:13 GMT -6
You may want to try stainless retainer nuts ,,,they look slightly oval and they hold tight without screwing the stud up
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