Thruster 700c Fixie Build

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bmoney

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Tonight I went to wal-mart to kill sometime before work, and obviously i had to check out the bicycle section.. Nothing really had my attention until i saw those bright red and yellow wheels and tires. Instantly thought, "hmm, that bike looks perfect for motorizing." After a test ride up and down the isles and a detailed visual inspection of the welds, i was quite pleased with the build of this bike. So then i hopped on the internet to read some reviews.. Everything checked out A OK! :love:
During my visual inspection i noticed a little ding on the top tube of the bike. Its really nothing that is going to affect the structural integrity but its worth mentioning!! After some haggling with the good people of wal-mart, the customer service manager agreed to give me 15% off because of it. So i got this already cheap bike that would have cost me 106.24$ for only $90 and some change :D

Here's a few specs from the site-
Riding style: Fixed gear bike
Frame: Steel
Gearing: Fixed gear or single-speed
Fork: Steel
Rims: Alloy
Brakes: Alloy side pull brakes
Dimensions: 70"L x 25"W x 45"H
Weight: 40.4 Pounds.

The power is going to be supplied by-
Freshly re-built 49cc Daemon bikes 2-stroke engine. (New cylinder head, piston, rings, all new gaskets, and upgraded allen/hex head 8 grade hardware)
Cns racing carburetor
Hi-Flow Air filter
Port matched intake

Next things on the list will be an expansion chamber and boost bottle, followed by a smaller rear sprocket..

Cant wait to get this puppy up and running. Ill be sure to update when it is...


THANKS for viewing! :sick:
 

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Started to assemble the bike last night and everythings coming together very smoothly. Engine fits great, no clearence issues, and no need for an oversized front mount :cool:

I do have a question though about rear sprocket sizes.. This bike came with a flip-flop hub meaning one sides freewheel and the others a fixed gear. I know this probably isn't a good idea but it got me thinking.. I could "technically" just slap the drive chain on the fixed gear sprocket(18 tooth) and avoid having to use the ghetto ragjoint assembly, and get a lot more top end.


My question is.. is an 18t WAY to small?? I mean, the 415 chain fits the sprocket fine and doesn't jump the teeth. I know id probably have to pedal up to about 20 mph to get it started, and the acceleration would probably suck as well as hill climbing. But I would think on a nice flat strip it would easily hit 45+ mph. Any input on this would be GREATLY appreciated...

So yay or nay to the 18 tooth?
Ps sorry bout the poor quality pics.
 

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I'm not done with mounting it yet, its just mocked so I could get everything else put on... Ill level it out a little more before I tighten everything down.

60 views and that's the only thing anyone has to say? This isn't a very active forum huh?
 
I wouldn't use the small gear that came with the bike. I think you will really hate it. I think some where else on the forum someone used this bike and somehow mounted the kit sprocket to the small gear on the bike. I know I'm being vague but I did read it here I believe. I was just thinking of doing a build with that bike. I really like it. I am interested in watching your build.
 
I'm not done with mounting it yet, its just mocked so I could get everything else put on... Ill level it out a little more before I tighten everything down.

60 views and that's the only thing anyone has to say? This isn't a very active forum huh?

I was thinking the same thing too. - Walmart Fixie.

How are you going to mount your sprocket? Please post pics with explanation.

BTW, Im thinking 36, 40, or 44 tooth rear sprocket for 33, 30 and 27 Mph speed.
As you know, the higher the speed, the slower the takeoff.

:)
 
Making some progress

Today I finally tackled mounting the sprocket and chain, It took me a few try's though. Once you pull off the lock ring(Reverse thread! Clockwise to loosen) you have a few options..
1.) You CAN mount the 44t directly over the the fixie gear, ALL of the 9 bolt holes lined up perfect with the fixed gear cog (which will eliminate any chance of slipping or stripping thread. You can still tighten up the lock ring this way. I tried this but didn't have any hardware that would seat flush and weren't overly long. It ended up being to sloppy for me.. I think the big washers i used killed it. (sorry its kinda hard to see the fixie sprocket in the 2nd pic but they did line up very well.)
2.)I chose to go with the good o'l rag joint, With the lock nut loc-tite'd(lol) on as extra insurance. If I come across some flush mounting hex head bolts I may end up swapping out the rag joint and going with the first set up but this will do for now.


After that was all done, I got the chain mounted up. I plan on running it with out a tensioner, which shouldn't be a problem seeing as you can adjust the tension via the rear wheel. The clearance is close enough, gimme the cigar!! No rubbing even when it slacks up for pop-starting.

Also got a little carried away shopping for stuff to start building an electrical system for this puppy, but that's a project for another day.. This hobby is way to addicting!!

That's all for now, hope this helps..
Thanks!!
 

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Today I finally tackled mounting the sprocket and chain today, It took me a few try's though. Once you pull off the lock ring(Reverse thread! Clockwise to loosen) you have a few options..
1.) You CAN mount the 44t directly over the the fixie gear, ALL of the 9 bolt holes lined up perfect with the fixed gear cog (which will eliminate any chance of slipping or stripping thread. You can still tighten up the lock ring this way. I tried this but didn't have any hardware that would seat flush and weren't overly long. It ended up being to sloppy for me.. I think the big washers i used killed it. (sorry its kinda hard to see the fixie sprocket in the 2nd pic but they did line up very well.)
2.)I chose to go with the good o'l rag joint, With the lock nut loc-tite'd(lol) on as extra insurance. If I come across some flush mounting hex head bolts I may end up swapping out the rag joint and going with the first set up but this will do for now.

After that was all done, I got the chain mounted up. I plan on running it with out a tensioner, which shouldn't be a problem seeing as you can adjust the tension via the rear wheel. The clearance is close enough, gimme the cigar!! No rubbing even when it slacks up for pop-starting.

Also got a little carried away shopping for stuff to start building an electrical system for this puppy, but that's a project for another day.. This hobby is way to addicting!!

That's all for now, hope this helps..
Thanks!!

Nice! There are Clam Shell Adapters from several makers, but with the right hardware, and from what you are saying, you dont need it!

With the grooves on the Fixie sprocket fitting perfectly with the 9 stock holes from your sprocket that came with your engine kit - It sounds like a "lay up"!

Did you by chance check your local Ace or True Value Hardware Store for the hex bolts?

BTW, can you explain how you got your pics under 100kb within your post?

:)
 
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