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2 Stroke Bicycle Engines & Kits 2 stroke engine kits need careful installation and setup, find out how from our professionals here!

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  #101  
Old 01-21-2017, 09:08 AM
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cannonball2 cannonball2 is offline
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Default Re: Cannonballs Back Into It With A BT 80

Seems I'm building(or trying too) a fully developed small M/C that's really an MB. Was looking at moped parts for a proper exhaust, a stock type. Found this.

Funny thing, I never really noticed the exhaust on the BT comes out on the right where as a CG is on the left. Left is better as there are clearance issues with the bikes sprocket/chain on the right. So it seems with a bit of rearranging I can make a cross under head pipe and have the muffler on the left.

Love the vintage look of this muffler!
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  #102  
Old 01-21-2017, 09:21 AM
curtisfox curtisfox is online now
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Default Re: Cannonballs Back Into It With A BT 80

KOOOL Beans, That is neat, leave it to you to find the good old kool stuff. Moped i presume ?....................Curt
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  #103  
Old 01-21-2017, 09:28 AM
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cannonball2 cannonball2 is offline
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Default Re: Cannonballs Back Into It With A BT 80

Yeah, don't remember what brand but its not real common.
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  #104  
Old 01-21-2017, 04:19 PM
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scratchbuilder scratchbuilder is offline
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Default Re: Cannonballs Back Into It With A BT 80

Yeah, I agree with curt, nice!
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  #105  
Old 01-21-2017, 04:58 PM
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cannonball2 cannonball2 is offline
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Default Re: Cannonballs Back Into It With A BT 80

Thanks yall!

Gonna be a ***** to install though.
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  #106  
Old Yesterday, 01:54 PM
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cannonball2 cannonball2 is offline
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Default Re: Cannonballs Back Into It With A BT 80

Got the exhaust hung.

Maybe not as elegant as a curved pipe but not bad. If I hadn't given away my conduit benders when I moved I might have bent up a head pipe. As it was I had all this stuff left over from a plumbing job. Getting the cross under pipe to clear the pedal crank was close.
Will solder the joints with 56% silver solder I ordered from the local hardware. It melts in the mid 1100s/1200F range compared to 450 or so for common solder. You actually have to use Map gas, propane wont do it I'm told. Plenty good for this exhaust. Heck pistons get iffy over 1250F. Its temporarily riveted together for testing.

So this engine really loves this pipe. Improved its power noticeably overall, with a good boost in the lower range. Stock pipe really was restrictive. Like the fit/looks and sounds better too. Have to make a better hanger, Adel clamp is temporary. Some hi heat silver will blend it all in .
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