| | | Motorized Bicycle General Discussion Topics on bicycle engine kits, help articles, repair and modifications for your motorized bicycles | Honda GXH50 hp Discussion at Motorized Bicycle Engine Kit Forum in the Motorized Bicycle General Discussion forum. I was wondering if anyone could tell me, if the Honda gxh50 has 2.1 hp at 7000 rpm, what ...  | 
12-09-2008, 12:54 AM
| | Motorized Bicycle Newbie | | Join Date: Dec 2008 Location: il
Posts: 7
| | Honda GXH50 hp I was wondering if anyone could tell me, if the Honda gxh50 has 2.1 hp at 7000 rpm, what would the rpm be if I used a governor to have it at 5000 rpm?
I am trying to find a way to make it have 2.0 hp or just under.
Thanks... | 
12-09-2008, 01:29 AM
|  | Motorized Bicycle Elite Member | | Join Date: Sep 2008 Location: Seattle
Posts: 442
| | Re: Honda GXH50 hp I would think you'd be safe @ 6000 rpm. Does your dmv dyno mb's or something? 'Cause I'm pretty sure that's 2.1hp @ the crank and not @ the rear wheel in which case your probably fine w/o a limiter. The trans/drive train should scrub off some of those ponies!  | 
12-09-2008, 02:10 AM
| | Motorized Bicycle Newbie | | Join Date: Dec 2008 Location: il
Posts: 7
| | Re: Honda GXH50 hp They don't dyno that I know of, It's just that we are not allowed more than 2 brake horse power here in Illinois. Just trying to stay legal, can't afford to invest that kind of money, then have the police tell me I can't ride it. | 
12-09-2008, 02:46 PM
|  | Motorized Bicycle Elite Member | | Join Date: Jun 2008 Location: Longmont, CO
Posts: 1,597
| | Re: Honda GXH50 hp Technically, that motor is no good for that law. Doesn't matter what you have it governed to, the motor is rated at 2.1 bhp.
Brake horsepower
Brake horsepower (abbreviated bhp) is the measure of an engine's horsepower without the loss in power caused by the gearbox, generator, differential, water pump, and other auxiliary components such as alternator, power steering pump, muffled exhaust system, etc.
This means that it doesn't matter about the gears or anything, unfortunately.
Does the motor say 2.1hp on it anywhere? If not, you're probably fine. Even if it does, you're probably ok unless you get stopped by a grumpy cop...2.1 is awfully close to 2. but still....
If it doesn't say 2.1hp on it, you're fine. if it does and you're worried, find a way to take it off without it looking like you just straight up took it off. | 
12-09-2008, 05:45 PM
| | Motorized Bicycle Newbie | | Join Date: Dec 2008 Location: il
Posts: 7
| | Re: Honda GXH50 hp Quote:
Originally Posted by jasonh
Does the motor say 2.1hp on it anywhere? If not, you're probably fine. Even if it does, you're probably ok unless you get stopped by a grumpy cop...2.1 is awfully close to 2. but still....
If it doesn't say 2.1hp on it, you're fine. if it does and you're worried, find a way to take it off without it looking like you just straight up took it off. | I'm not sure if it says on it or not, I've tried looking at pictures of it but can't make out the writing. If anyone knows could you let me know? | 
12-09-2008, 08:01 PM
| | Motorized Bicycle Senior Member | | Join Date: Sep 2008 Location: Los Angeles,CA
Posts: 90
| | Re: Honda GXH50 hp In Cali, its 2hp and under 50cc. Im thinking of getting the GX50 eventually also. Although the cc's are actually 49cc on the Honda, the sticker on the fan cover says GX50. Im planning on just taking the sticker off and cleaning the area with acetone, then try ordering a GX35 sticker or just have a cheap sticker made.
Tell them you work for greenpeace or the sierra club and that you get 150MPG, they might have a heart for you. | 
12-11-2008, 02:30 PM
|  | Motorized Bicycle Senior Member | | Join Date: Oct 2008 Location: Tampa, Fla.
Posts: 69
| | Re: Honda GXH50 hp Here are the precise ratings if it matters:  | 
12-22-2008, 01:58 PM
|  | Motorized Bicycle Elite Member | | Join Date: May 2008 Location: CT, U.S.
Posts: 2,615
| | Re: Honda GXH50 hp Quote:
Originally Posted by jasonh Technically, that motor is no good for that law. Doesn't matter what you have it governed to, the motor is rated at 2.1 bhp.
Brake horsepower
Brake horsepower (abbreviated bhp) is the measure of an engine's horsepower without the loss in power caused by the gearbox, generator, differential, water pump, and other auxiliary components such as alternator, power steering pump, muffled exhaust system, etc.
This means that it doesn't matter about the gears or anything, unfortunately.
Does the motor say 2.1hp on it anywhere? If not, you're probably fine. Even if it does, you're probably ok unless you get stopped by a grumpy cop...2.1 is awfully close to 2. but still....
If it doesn't say 2.1hp on it, you're fine. if it does and you're worried, find a way to take it off without it looking like you just straight up took it off. | Thanks Jason. I always wondered What brake horsepower was or how to measure it.
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