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Post by prodigit on Mar 25, 2013 22:00:51 GMT -5
I think we could almost make another thread forum thread about them!
So how come they aren't performing as well as a scooter?
I think the sprocket is rather large, resulting in a lot of torque, but low top speed.
Especially if you pedal from a dead start, and use the engine to add speed, I hope there are different sprockets that will allow cruising at higher than 35MPH speeds!
Not only would that benefit in faster speed, but also better MPG.
I'm seriously intrigued!
I probably will install it in a 30" wheel diameter beach cruiser cycle from walmart!
But from the looks it looks like the exhaust may be in the way of the pedals, could this be true?
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Post by skuttadawg on Mar 25, 2013 22:04:43 GMT -5
A single gear chain drive can not perform as good as a CVT can with the gear like variations of the expanding belt
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Post by scooterelements on Mar 26, 2013 9:16:30 GMT -5
I think we could almost make another thread forum thread about them! So how come they aren't performing as well as a scooter? I think the sprocket is rather large, resulting in a lot of torque, but low top speed. Especially if you pedal from a dead start, and use the engine to add speed, I hope there are different sprockets that will allow cruising at higher than 35MPH speeds! Not only would that benefit in faster speed, but also better MPG. I'm seriously intrigued! I probably will install it in a 30" wheel diameter beach cruiser cycle from walmart! But from the looks it looks like the exhaust may be in the way of the pedals, could this be true? They sell different size sprockets. That is actually where i am getting my bicycles is walmart. I had to buy them online tho because they are sold out here. That is what other stores are doing is buying the bikes from walmart. There is a Bike distributor here that sells bikes but they are high end bikes that cost alot of money like HARO, Jamis, and others. The exhaust is actually no way near the pedals. It goes right under the bottom frame. Only thing that might suck is being at a standstill and getting some smoke in your area. |
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Post by prodigit on Mar 26, 2013 10:51:57 GMT -5
A single gear chain drive can not perform as good as a CVT can with the gear like variations of the expanding belt Performance wise you may be correct. However from what I read (especially with the BBK's on them), they have plenty of torque; and with pedalling you can easily outrun a scooter (until 35 something MPH). The chain ratio is not good. I looked around, and found most people sell either the 50 sprocket, or the 41 sprocket. The 50 sprocket goes ~26MPH, the 41 goes ~32MPH (depending on the diameter of the wheel). So getting one with big wheels (30 or 32 in preferably), might get you fastest speeds, though lowest acceleration (which should not really be an issue, as you can always aid the engine with the pedals). How are the vibrations? I heard some people complain about that a lot online. Also see some people get motormounts with rubber dampers. Don't know where I can get those.... Also, I heard sometimes it's necessary to drill in the frame..?? AYS (are you serous??).. Don't know if I would want to drill in a bicycle frame though! |
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Post by scooterelements on Mar 26, 2013 11:22:02 GMT -5
I have never seen anyone drill into the frame. The motor is mounted with brackets to the frame. as for vibrations i have not heard anyone complain about it. most use these bikes to get around town or on the weekends to ride around the coastline.
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Post by prodigit on Mar 26, 2013 11:25:15 GMT -5
It seems that if the rims are 24in, and the top speed is ~32MPH, then (theoretically) changing to 30in wheels would bring up the top speed to ~40MPH.
In reality it would rather be 38MPH due to increase in resistances (like wind etc).
If the rear sprocket could be changed to a 36T sprocket, the top speed could increase by 5MPH further, to a theoretical 45MPH (in practice, it may only increase to 40 or 42MPH).
So my question would be:
Where can I find smaller sprockets than 41?
In my case (170LBS, flat ground), I don't really benefit from torque or acceleration. Top speed and MPG is what I care for.
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Post by prodigit on Mar 26, 2013 11:37:17 GMT -5
Whoo! Evilbay sells 34T and even 32T sprockets  In that case, if they fit, I'd probably get a 28" with a smaller sprocket. I'm just a little nervous if everything will fit well.... Another thing I'm contemplating, whether or I should get a mountain bike, or a beach cruiser; Advise? |
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Post by scooterelements on Mar 26, 2013 12:04:14 GMT -5
Most install the engines on bikes with at least 26" rims but most are doing it with 29" rims. The sprockets i sell them with 32-34-36-38-41 teeth. I gotta make sure which i still have in stock. I sell them usually here at my store for about $16.00
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Post by scooterelements on Mar 26, 2013 12:05:22 GMT -5
[replyingto=prodigit]prodigit[/replyingto]I see most with cruisers because you have that extra room to mount the engine. and i have heard that you can only use it with 1 speed bikes unlike mountain bikes that have like 18 speeds
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Post by Deleted on Mar 26, 2013 17:18:06 GMT -5
Is there some sort of sprag (one way bearing) clutch at the bicycle crank? I've never seen how the engine over-rides the bike crank on one of these.
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Post by prodigit on Mar 26, 2013 20:03:59 GMT -5
scooter Elements: any user experience you want to share with us? Have you taken them out on a spin already? I saw they sell em in 50 and 66cc version (66 basically the same as 80cc). I wondered how the takeoff speed is on those things, on a level ground, with a normal weight person (say 160 < x < 200 LBS), and with how many Teeth on the sprockets and wheel diameter? Are the front sprockets interchangeable? I talked to a guy who saw one riding in Miami, and he was interested in one too! If I could increase MPG on that thing, and can get a nice and constant 40MPH by selecting the right rear sprocket, that would be amazing! Here in FL, for the most part, there's not much of wind, and the ground is pretty level, no real hills.
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Post by prodigit on Mar 26, 2013 22:01:44 GMT -5
Do you think it's possible to get an aftermarket sprocket for the bike part somewhere? (rear and front)?
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Post by prodigit on Mar 26, 2013 22:13:56 GMT -5
Found 2 bikes, just wondering which I'd get: The outside diameter of both bike's tires are about the same. The black one has 29" tires with very balloony tires, costs less, and the tires probably give better suspension. The white one is more expensive, but has 32in tires. I like a white one better, but I'll probably go for the black one, as I don't want to spend too much money on it. Also, the frame of the white one bends down, resulting in maybe not enough space for the motor on top (whadda ya think?  ) More expensive White one: www.walmart.com/ip/32-Genesis-Men-s-Beach-Cruiser-Bike-White/20658229Cheaper Black one: www.walmart.com/ip/Genesis-Onyx-29-Cruiser-Bicycle/16203481I've tried finding a bicycle with 3 speed gear in the back, but think that those kind of bikes probably won't support an engine (sprocket) mount. Man, I feel like a baby enjoying a new toy! Gotta learn everything there is about it! It's the promise of 150MPG that actually grabs my attention!  |
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Post by skuttadawg on Mar 27, 2013 0:35:56 GMT -5
Bicycles from a bike shop are waaaay better than Walmart bicycles as I used to ride Cannondales . I had gel foam inserts instead of tubes so it never would have a leak or a flat . I really like the Schwin Stingray myself . Make sure to get one with a water bottle set of screws to hold a fuel tank . The high end bikes can have two of em . I would have one with cold water for going out and a frozen one which would thaw for the return trip .
I do not if its still in business but I have saw a CVT for bicycles instead of a derailer but unsure it it could handle the torque of an engine . I could make the frame flex on my racing Nikisik ( spelled wrong ) as I was an iron man in my college days so I had to get a mountain bike in stead of a street racer . Trek and Giant are also goob bike brands . Trust me it is worth the extra money than a Walmart bike I promise
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Post by jeepsteve92xj on Mar 27, 2013 7:41:52 GMT -5
From everything I've read about those bike engines, 80cc is actually only 66cc, which is a terrible discrepancy, just like the 200cc scooters that are only 172cc or whatever. They should be required to be states/rated within 10% or even 5%.
I was thinking about a 66cc for my 1980 Huffy.
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