Need some suggestions.

Hello, I am looking to get an engine for my bicycle. I have read threw all of the stickies, and checked out all of the web pages that sell engines, but I still just don't know which one would fit my needs (I am new to the world of bicycle engines ).

I have a good amount of experience with 2 stroke engines. I have had 125cc 2 stroke, 250cc 2 stroke, a "drag" Banshee (364cc 2 stroke running avgas), a 250cc 4 stroke and a 125cc 4 stroke.

-I would like to spend no more than about $300(+or- some if worth) it on the engine.
-It will be used as a primary mode of transportation.
-I definitely need something that gets good gas mileage (50mpg minimum {if that is realistic}).
-I don't mind mixing oil (I have always preferred/loved 2 strokes).
-I do have access to welding equipment, and I have just about any tool I could need.
-Quietness is a plus (I don't want to make people angry or piss off cops).


I would really appreciated any suggestions you guys could give me .

If you go with 2-stroke, they're basically all the same kit (with a few minor differences). So the general consensus is go with a reputable dealer that will be easy to work with if something happens to go wrong.

There are a couple other 2-stroke motors available, but they are much more expensive (and more powerful). I forget the brand, but Easy Rider has one.

The gas mileage of these Chinese-made 2 strokes is 100-150mpg so I think you'll be able to get what you want when it comes to that.

There is a "find a dealer and review" type of thread somewhere around here, it might help.

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ok thanks. I was wondering about a few other things as well... With the two stroke engines, do they exhaust a lot of visible smoke? I know that my dirtbikes did, but how about these smaller engines? Also about how loud are these at full throttle? Are the Chinese engines reliable? lol sorry for all the questions .

I have only seen smoke from my motor once, and that's when I had a bit too much choke on it and it was just idling warming up.

I'd say they're about as loud as a cross between an industrial leaf blower and weedeater. There are ways to make them quieter though.

If you take care of them, they can be reliable. unfortunately they're just really cheep Chinese goods, so tolerances aren't great, and they won't last as long as a Japanese-made motor would. Several people on here have ridden there's for thousands of miles though.

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Alrite, thanks for all of the input.

After looking through all of the websites, to me it seems that this one is best...

FiveFlagsMotorBikes.com (there 70cc 2 stroke motor kit)

Does anyone have any experience with them?

Also were can I get aftermarket parts? (such as different gas tanks, sprockets etc.)

I haven't personally heard much about fiveflags.

As for aftermarket parts...you can get sprockets from King's (see ad at the top of this page).

I've only seen one different gas tank come with these, and it was the same shape, just bigger. If you want a different gas tank, you'll probably have to make your own, or modify an existing one.

You can get expansion chambers for pocket bikes and small dirt bikes, but you will have to adapt them yourself for the motor.

There are a couple carbs available.

For more, see here: High Performance Bicycle Engine Tips - Bicycle Motor at Motorized Bicycle Forum

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that would be the Morini.

Have you looked into Dax, Livefast or Spookytooth? All are priced similarly, and all have a good reputation.

I have never heard of that seller.

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If it ain't broke, and you mess with it long enough, it will be.

ah ok, yeah I just don't like the look of the gas tanks that come with these kits... I just don't think putting a "chopper" style gas tank on a bicycle really works. I will defiantly be on the lookout for one I can make. I will definitely check around for different parts and things that I can do. Thanks for all your help so far .


Oh woops, I completely missed the engines section on Spooky Tooth. Dax and livefast are to expensive.. But the 70cc Spooky Tooth engine kit is perfect, and it is close to me (Arizona, im in California). Thanks .

If you look at datz150's build thread in the pictures section "rotten orange" he has fabricated a cylindrical gas tank for mounting on the rear rack.

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