Show us your Pipe!

2door

Moderator
Staff member
Sep 15, 2008
16,325
114
63
Littleton, Colorado
Tom, good eye...Exactly right 1 1/8" ... the best stuff is free stuff.

TiM
If we were plumbers, we'd have said it was 1" :)


I saw some pre-bent 1" EMT 90s at the hardware store a few days ago. They were a noticably tighter radius than what you get with a bender. I considered trying one but I don't like the idea of having too many weld joints to deal with. I might have to think about a copper exhaust some day. ACR copper would make nice strong straight runs and no tedious TIG welds

Tom
 
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toojung2die

New Member
Feb 10, 2011
23
0
0
La$ Vega$ NV
I don't know if you've already checked out the pipes at Treatland.tv These guys have about a million cool(and expensive) pipes to pick from.
Treats is my favorite moped parts source! Helped me get my QT50 running and even had me looking at big bore kits for it. Glad you linked to him because MB builders should check it out for ideas and hard to find parts. There's a big culture into tricking out old and newer two stroke mopeds and making them go stupid fast. So far all the mufflers I like on there are *sorry none today* but it's fun to look and wish.

If you buy from Treats don't be surprised if you find an unexpected "treat" in the box with your part ;-)
 

culvercityclassic

Well-Known Member
Sep 27, 2009
3,115
134
63
Culver City, Ca
Treats is my favorite moped parts source! Helped me get my QT50 running and even had me looking at big bore kits for it. Glad you linked to him because MB builders should check it out for ideas and hard to find parts. There's a big culture into tricking out old and newer two stroke mopeds and making them go stupid fast. So far all the mufflers I like on there are *sorry none today* but it's fun to look and wish.

If you buy from Treats don't be surprised if you find an unexpected "treat" in the box with your part ;-)
Treatland ROCKS
 

biknut

Well-Known Member
Sep 28, 2010
6,511
206
63
Dallas


Copper to copper is all I know how to weld. The silicone rubber hose from SBP works well to join to steel.
Biknut .... HEy nice bike BUuuuuuuTT ... do u want to to proplu use your expantion chambour .... ???? u have 2 have it Comming off the Engine for it to worke and Givve the right wave resanations .. any wayz NICE
You guys drive me crazy. Don't you think if I could of figured out how to mount it properly I would have? I've tried it 3 times before, and each time I decided it was impossible. There's nowhere to mount anything to. The bottom bracket spindle is too narrow. And besides that I ripped my pants trying.

But since everyone is such an expert, I decided to give it one more try. This time instead of impossible, I consulted with Kim Possible. I worked on this all day.

 
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breno

New Member
Aug 19, 2010
411
0
0
Syd. OZ
I've been running this one I built the summer before last.

I made the steel flange from flat bar stock and made a much larger diameter opening that matched the size of the exhaust port in the jug.

It's brazed to a pocket bike pipe I got off of E-Bay for $10.

Unlike pipes with skinny header pipes this thing doesn't fall flat on it's butt at high rpm's.
That pipe looks nice and flowy.
What size pipe did you weld on to the flange is that copper aswell welded onto that metal flange?
 

porch lizard

New Member
Nov 7, 2011
143
0
0
Scarville, Iowa
Here's my exhaust. It starts out as stock flange, goes to 3/4" copper, then because of the length, goes to 1" copper, a homemade expansion chamber, and finally 3/4 " copper connection with Briggs muffler. It works good, but ended up longer than I wanted it and the Briggs muffler is louder than I'd like.
All but the muffler is brazed together. There's a hanger between the pedal crank and kickstand, and another one at the rear axle dropout.
 

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BarelyAWake

New Member
Jul 21, 2009
7,206
9
0
Maine
SBP system w/heater hose extension;

SBP chamber only w/kit manifold & fabricated 6" glasspack;

Aftermarket silencer & fabricated pipe w/header wrap;