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Post by prodigit on Mar 27, 2013 8:02:49 GMT -5
Well, 66cc's is not that bad for a bicycle, considering most bicycles are below 40LBS, plus 20LBS for the engine and perhaps 1LBS on fluids; that totals to just over 60LBS.
Compared to my ATM50, which has a weight of ~220LBS (or almost 4x more).
Granted, with well pumped up tires weight makes very little difference in top speed, and only minimal difference in acceleration. It's aerodynamics that are important, and those beach cruisers or mountain bikes, aren't very aerodynamic; at least not as much as the scooters.
What I think though, is that the 66cc is actually a 33cc engine (since they're 2 stroke).
From the performance numbers, they seem to reach a max of 40MPH, which is about comparable to a 49cc 4stroke.
I just don't get why a 66cc 2T would only be able to get upto 40MPH (highest numbers I've seen so far are 37-38MPH)...
There must be something wrong with the gearing or the math, because 50cc 2stroke scooters go 50+MPH.
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Post by carasdad on Mar 27, 2013 9:35:15 GMT -5
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 Not true....I have put a few on for folks. The drive gear mounts on the opposite side of your real wheel gear cluster.  |
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Post by oldchopperguy on Mar 27, 2013 10:31:11 GMT -5
These conversions are interesting!
Fifty years ago, I was a nut for the Whizzer... Same idea. Recently, I saw a video of a fellow who did the 2-stroke mounain-bike conversion, BUT... he powered a jack-shaft that then powered the PEDAL-CRANK via the outside chainwheel, or sprocket. It was originally a 10-speed bike, so it retained the 5-speed de-railer in the back. So... He now had a 5-speed "transmission" for the engine to run, while STILL retaining a 5-speed pedal-bike.
VERY neat, and it went like stink!
Food for thought...
Leo in Texas
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Post by scooterelements on Mar 27, 2013 10:56:04 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. From what i hear that is also true! |
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Post by scooterelements on Mar 27, 2013 10:56:59 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. Not yet. I am still waiting on the bikes and engine to arrive. |
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Post by scooterelements on Mar 27, 2013 10:57:53 GMT -5
[replyingto=prodigit]prodigit[/replyingto]Yes. I need to check with the store in Ponce, PR that sells so many aftermarket parts for them. Still trying to figure out where they are getting them from
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Post by scooterelements on Mar 27, 2013 11:01:33 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 Yes that is true! But for my area where i have my shop is not an area where people have lots of money to spend on those bikes. People here look for the cheapest. I can offer my customers higher end bikes. Here is one for example that would retail for about $700.00+  |
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Post by scooterelements on Mar 27, 2013 11:02:37 GMT -5
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 Not true....I have put a few on for folks. The drive gear mounts on the opposite side of your real wheel gear cluster. Interesting. I would love to see a engine mounted on a bike with multiple gears. |
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Post by prodigit on Mar 27, 2013 11:46:22 GMT -5
Some people have tried, but you'll need a chain tensioner, which makes a lot of noise, and eats away power.
Concerning the installation of the sprocket with a Mountain Bike, they seemingly do not have sufficient width to host 2 sprockets.
Also, Beach cruisers with 3 gear system inside the brake drum, don't work, because they have a mount on the opposite side.
As far as I can see, there are 3 basic ways to make these bikes:
Performance, normal, or eco,
and with each one, (for a single geared bike) you can change the pedal sprocket to either give you additional acceleration from a stand still, normal bike mode, or get a high gear to aid the engine at high speeds.
Having a pedal 'kickstart' the engine, basically a low gear (meaning fast pedaling, not fast riding, like most beach cruiser setups), pairs well with an ECO engine setting (eg: use a 32-36 rear sprocket).
Normal biking, this is most sold, with the 41T setup, tops out at ~30MPH, with the pedaling gear like a regular bike.
The third setting would be nice if you like high speed cycling.A very large gear is used for acceleration with the pedal, and is used to 'keep up' with the engine at high speeds.
The down side of this is, that it takes immense power to depart from a standstill; but once on a move, you could probably boost the MPG's as well as the speed by at least 25% (if not 50%) by aiding the engine in pedaling.
At the moment, I'm aiming for a 29" wheeled ride, paired with a 36T sprocket.
From the forums, and using a little math, this should result in ~40MPH.
From there, it's just basic fine tuning with the sprockets, until I find the desired acceleration.
Since the engine is a 2.7HP engine, it should be able to get to 40MPH fairly easy.
Once I have the bike, I can say if perhaps when accelerating from a red light using the pedals and engine, if the bike goes too slow; then I'd have to change the sprocket.
In some states it's illegal for these 'motor assisted bikes' to go faster than 20MPH. In most states the speed limit is 30MPH.
However you will want to have your bike go faster, in case you need it; but also, it'll help not revving the bike so high while riding.
I presume most people will be riding somewhere between 25 and 35MPH.
If you're on the higher end of the spectrum, you'd be revving the engine almost to the max with a 36-41T sprocket.
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Post by scooterelements on Mar 29, 2013 11:44:41 GMT -5
Just got the two bikes i ordered yesterday! Got to say not bad deal They cost me $149.99 from walmart.com and got the shipping for free via UPS 2 day air. Not bad considering the boxes were huge! Have one of my friends putting them together right now. Now just gotta wait for the motors to arrive next week.  |
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Post by prodigit on Mar 29, 2013 17:21:33 GMT -5
I finally decided not to go for it.
After much research I found there are many limiting factors.
1- One being, the metal bar holding the rear wheel coaster brake (on the opposite side of the stock sprocket), could be in the way for the new sprocket, requiring hammerwork, and stuff..
2- The motor fits best on cruiser bicycles, but not on many mountain bikes
3- Cruiser bicycles come stock without front disc brake, or front suspension
3b- They also come stock with just 1 gear. I wished they would still sell the '3 gear in rear wheel hub'-kinda thing.... Then the pedals could be used to accelerate from a dead stop in gear 1, and help out the engine even at top speed in gear 3.
4- The kit works for 36 spoke bikes. Most 26" wheeled bikes or smaller are 36 spokes, but me being tall requiring a 29" bike the least, can't find a bike with 36 spokes (they come with 40 spokes)
5- After purchasing a bike and kit (no longer a $100-150 bike, but with upgraded front suspension and disc brakes and upgraded more comfortable saddle) I would spend ~$400 for this setup, which generally is underpowered.
6- Most of all, the 150MPG has never been evened by anyone I know. Best thing I've heard was 120MPG, but that bike was after many mods. 100MPG seems attainable, but then again, I get ~100MPG on my TaoTao ATM50 too, and that scoot goes 50MPH on a good day; not 32 or 38MPH; plus has more reliable parts (frame, brakes, engine, etc...).
So all in all, it's a fun hobby, and it may be fun coasting at 28MPH, however, when I look around me, the roads are all 30MPH+, and I would not be able to use a bike like this.
So, I've decided to get rid of my Honda Shadow VT750, and in the future buy something similar than a Suzuki TU250X. If they only had the Suzuki S40 with fuel injection...
Dropping over 200 LBS in a bike is a great improvement!
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Post by scooterelements on Mar 30, 2013 9:59:39 GMT -5
Yea i always see these engines installed on cruiser bikes. They are best for beach areas and here in PR like in my town because you really cant go fast due to so many twist and turns and crappy roads. Most that buy these bikes are either just to go for a simple ride around town or just to be the first of there friends to get one. They have exploded in popularity here. Alot are installing aftermarket parts and upgraded valve heads ect... They are not fore everyone
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Post by prodigit on Mar 30, 2013 20:06:00 GMT -5
I'm still hesitating... LOL...
I really wished there was this $200 bike (cruiser), with front suspension and disc brake, that would fit this engine.
Then I would not think twice to do the purchase!
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Sophomore Rider
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Post by ilovenxstage on Apr 2, 2013 13:06:42 GMT -5
[replyingto=prodigit]prodigit[/replyingto]I just finished building one of these using the 66cc kit, and even though I still have a lot of tinkering to do to make it run smoothly, it works pretty well. I have it mounted on a Diamondback 24 speed hybrid bike.
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Post by marshalldillion on Apr 2, 2013 13:12:26 GMT -5
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