| | | Motorized Bicycle General Discussion Topics on bicycle engine kits, help articles, repair and modifications for your motorized bicycles | Bicycle motor with a cat? Discussion at Motorized Bicycle Engine Kit Forum in the Motorized Bicycle General Discussion forum. Especially the EPA engine, great for mounting to anything you want! Have many good spare parts left over to build ...  | | 
05-07-2008, 05:53 AM
|  | Moderator | | Join Date: Jan 2008 Location: Ashtabula county, Ohio
Posts: 3,066
| | Re: Bicycle motor with a cat? Especially the EPA engine, great for mounting to anything you want! Have many good spare parts left over to build time machine with!
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05-07-2008, 07:12 AM
| | Banned | | Join Date: Mar 2008
Posts: 147
| | Re: Bicycle motor with a cat? BTW, 2 stroke engines of any variety DO pollute a lot.
2-stroke gasoline engines, which take in fuel and emit exhaust in the same stroke, still dump from 25-30% of their fuel unburned directly into our environment.
According to U.S. EPA comparisons of 4-stroke and 2-stroke recreational vehicles, a 2-stroke engine emits 30 times more hydrocarbons (benzene, butadiene and polycyclic aromatic hydrocarbons) and 40 times the particulate matter as does the more efficient 4-stroke engine | 
05-07-2008, 05:24 PM
|  | Moderator | | Join Date: Jan 2008 Location: Ashtabula county, Ohio
Posts: 3,066
| | Re: Bicycle motor with a cat? Yeah, but these bicycle motor kits will still pass EPA regs, so they must be "clean" by the EPA's own standards.
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05-07-2008, 05:29 PM
|  | Moderator | | Join Date: Jan 2008 Location: Ashtabula county, Ohio
Posts: 3,066
| | Re: Bicycle motor with a cat? As to the pollution problem...ever think about how much pollution a single trip cross country in a 727 makes?
How about the fact that most trains leak more oil in an hour than a two stroke bicycle motor will use in it's entire service life.
Or all those idling police cars?
Ever follow a garbage truck? City bus? Big Dodge Ram diesel?
Or what about all that smoke that comes out of the top of a Bogus King restaurant?
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05-07-2008, 06:26 PM
|  | Moderator | | Join Date: Mar 2008 Location: Tucson,Arizona
Posts: 1,783
| | Re: Bicycle motor with a cat? When did the EPA do it's comparison? 10-15-20 years ago? 2-stroke oil has improved alot in the past few years. | 
08-23-2008, 05:09 PM
|  | Master Motorized Bicycle Builder | | Join Date: Apr 2008 Location: Albuquerque
Posts: 108
| | Re: Bicycle motor with a cat? Two strock oil has definitly improved, I had some cheap oil from a Autozone store in bind. The china did smoke more. As for the cat existing, theres just no way it would cost more for a kit. The rare metal thats in them. No way, good observation! I've got got some blinker bearings for turn signals I'll sell, anyone? | 
08-23-2008, 05:23 PM
|  | Master Motorized Bicycle Builder | | Join Date: Mar 2008 Location: Bellingham, WA
Posts: 154
| | Re: Bicycle motor with a cat? They are starting to make a CAT muffler for our little 2 strokes it is not BS, now weather the BGF pipe actually has a CAT I don't know but I know dax is starting to market them. This is what it looks like inside. | 
08-23-2008, 05:47 PM
|  | Moderator | | Join Date: Mar 2008 Location: Tucson,Arizona
Posts: 1,783
| | Re: Bicycle motor with a cat? Quote:
Originally Posted by Ghost0 They are starting to make a CAT muffler for our little 2 strokes it is not BS, now weather the BGF pipe actually has a CAT I don't know but I know dax is starting to market them. This is what it looks like inside. | Now that looks like a cat to me...thats exactly what you would see in a automotive cat...almost like a honey comb  | 
08-24-2008, 11:19 PM
|  | Master Motorized Bicycle Builder | | Join Date: Jan 2008 Location: Long Beach Ca
Posts: 194
| | Re: Bicycle motor with a cat? I wonder how they can keep the cost down. Platinum is a precious metal and putting it in a china fire engine and still keeping the cost down sounds like a Oxy-Moron. If it will keep the engine around longer, I'm all for it. I wonder if it requires the modification of the fuel mix to a higher fuel ratio. It would be difficult to lean out the oil ratio with the loose tolerance and poor quality of the bearings used. I would like to see and smell less of the two smoke. Have fun, Dave
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Last edited by nogoodnic : 08-25-2008 at 04:36 PM.
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08-25-2008, 06:22 AM
|  | Moderator | | Join Date: Jan 2008 Location: Ashtabula county, Ohio
Posts: 3,066
| | Re: Bicycle motor with a cat? Since these engines have been shown to easily pass EPA regs in Arizona, I think they are putting a piece of corrogated metal in the exhaust and calling it a cat.....
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