My build - Gassy Gary



Jul 18, 2020
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This is probably sacrilege to a couple of you klunker fans, so I apologize in advance.

Not long ago, I got this sad old Gary Fisher and wanted to give it a second lease on life.

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And this is what I came up with:

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It was a blast, but I could never quite get over the aesthetics. It just looked...slapdash. So when the engine grenaded itself and necessitated a rebuild, I took the opportunity to go back through and make the thing look more respectable.

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There's a couple little things left to button up still, but I'm a huge fan of how it's shaping up.
 
Jan 21, 2009
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I've only seen the gas motors with the big cog added to the rear wheel. Is that connected to the chainwheel?
 
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Any engine mods during the rebuild?
Yep, windowed piston and reed valve. Also got a modded KTM CDI with adjustable timing curve. Excited to finally fire it up and see how hard it rips.
I've only seen the gas motors with the big cog added to the rear wheel. Is that connected to the chainwheel?
It is. Here's some photos that should show the setup better.

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The blue thing in the middle of the chainrings is a freewheel so they can spin forward without the pedals having to move. But the whole point of this contraption is to put the engine power through the rear cassette, allowing you to shift. Makes the machine a hundred times more usable, and powering down the street banging gears is an absolute blast. (just make sure there aren't any cops around, since most places don't let motorbikes or mopeds have manual transmissions.)
 
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wow this is cool. a video of it would be nice.
 
Jan 21, 2009
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That's how it should be done. Most of those I've seen look like a high school shop project. I rode one my brother put together but the vibration was terrible.
What's your top speed? It looks like it's way over 25mph in high gear.
 
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wow this is cool. a video of it would be nice.
I'll film something once it's running.
That's how it should be done. Most of those I've seen look like a high school shop project. I rode one my brother put together but the vibration was terrible.
What's your top speed? It looks like it's way over 25mph in high gear.
One time I got it to about 30 in fifth, and didn't have the intestinal fortitude to go any higher.
 
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Jul 18, 2020
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Okay, question for you guys. I got a whole lighting system ready to go on as soon as it's making noise again, but I'm stuck between two headlight setups. Either one will just be holders for the same LED lights, so I'm just concerned about aesthetics.

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First one is this little moped light. I like that it's not obtrusive, but fitting the LED units inside and mounting it would probably be harder than the second option.

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Second is this fairing. Would be easier to mount up and stick the lights in (they're the exact same diameter as the bulbs), but as it is right now, it makes the bike look like a midget with a giant head. I'm thinking it might look okay if I cut down the windscreen a bit, and would also let me hide some of the wiring and cabling.

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Any opinions?
 
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Also I scored one of the Jump Bike wheels from Jag35. I was actually wanting this same exact setup for this build, for a better ratio spread, a stronger chain, and better brakes than the rim brake that's on it, so I couldn't afford not to buy it when I saw them come up. At least that's what I tell myself every night.

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She lives once again. Runs a bit rough right now but I'm sure that'll clear up after break-in. Also the rear wheel has a couple busted spokes, so I'm debating whether to spend the money to get it fixed or just wait until I have all the parts together for the Sturmey wheel. I gotta say, though, with the new bars and seat, she's REALLY comfy.
 
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