Help in making my first build :)

Hello Everyone,
I am new to this forum but found it to be quite awesome.
I am a Indian high school student from Mumbai.I would like to turn my stingray chopper styled bicycle into a motorized one due to my long commutes to school about 10 km one way.I am a complete newbie to motorized bikes and stuff but am a science student ;)
I am unsure whether electric motor or a gas powered motor should be used :eek:
Petrol is pretty expensive in India, about $ 1.37 per liter :(
Please tell me how much would it cost me and will all the items required be available to me in India? :)
Also, I am not interested in ready made kits and am into DIY :D
i don't much time only 2 weeks until my school reopens :cry:
thanks in advance,
Murtuza Abbas :)
 
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Welcome to the forum. It would be great to just buy a nice Royal Enfield, wouldn't it? They are beyond my budget too these days. The Chinese HT 2 stroke motor is probably best for your stingray. Many members on this site have motorized stingrays and they look great. Search this site for "stingray" to see some.
You will need to mount the the motor offset an inch or so to the left of centerline so the motor chain will clear the fat rear tire. They sell "stingray" motor mounts on EBay but you would need to see if the seller will ship to Mumbai before purchasing.
I would not get an electric motor kit unless you only plan to ride only ten miles or so per day. It is very expensive to get more range because it will require pricey LiPo batteries.
 
Hey @wheelbender6,
Thanks for your quick reply but I would be really satisfied if you can answer the following systematically;
1)Which engine should I use for my chopper, 2 stroke or 4 stroke and how powerful if I want it to work upto speeds of 45kmph easily but want to keep the mileage to over 125 kmpl and if not then I would like to know about electric options and I am ready to peddle along with reasonable power?;
2)How much will the whole setup cost me?;
3)If I wish to add extras like headlight and horn and stuff like that then how do I power them?;&
4)Last but not the least, I want a complete easy guide for motorizing a bicycle because I am completely new to these stuff? :confused:
Also, please tell the total list of things I need to get from the store because I can't wait to ride a motorized chopper ;)
Thank you so much for devoting your valuable time towards my thread :)
P.S: here are two Honda engines which I guess are fine for my purpose;
http://engines.honda.com/models/compare/gx35,gxh50
Please let me know if these are fine :)
Please answer ASAP, impatient to ride a motorized chopper :D
 
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I can show you a list of things you need for your sting ray and some prices but I don't know if these companies ship to the sub-continent.
First, I would not attempt to mount a 4 stroke motor on a Stingray (for a first time builder). They are tougher to mount and require a reduction gear box (2 stroke China girls motors have an internal reduction of 4:1). Here are some links to items you will need. I don't know if they will ship to Mumbai.
Engine kits
http://www.bikeberry.com/gas-engine-kits/gas-engine-kits.html
http://www.kingsmotorbikes.com/2_stroke_bicycle_engine_kits.htm
Stingray engine mount
http://www.ebay.com/itm/Schwinn-OCC...077?pt=LH_DefaultDomain_0&hash=item33823776d5
http://www.bikeberry.com/motorized-bicycle-offset-wide-frame-chopper-mount-kit.html
You will need a second chain – kit chain not long enough for a sting ray
http://www.kingsmotorbikes.com/Standard-410-Chain.htm
Spring loaded chain tensioner (for the longer chain)
http://www.ebay.com/itm/HI-PERFORMA...Cycling_Parts_Accessories&hash=item232b1ba354
Good luck
 
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You asked about lights too. I would go with battery powered lights that require no wiring. The LED lights are very bright and provide long battery life.
I have run 6 volt lights from the "white wire" on my 2 stoke motor and it blew a lot of bulbs.
I have also mounted a rechargeable 12v 5ah hobby battery on my bike to power 12v lights. Recharging the lead acid battery was very time consuming.
I also did not like having extra wiring running along my frame. To me, keeping a set of small replacement batteries in my back pack for battery powered lights is easier than fixing a light wiring problem on the side of the road at night.
I know that you are not interested in motorizing your stingray from a kit, but that is the only way you can come close to finishing your project in a couple of weeks. You can do non-kit motor on your stingray when you have more experience and available time. Just my opinion.
 
Hey @wheelbender6,
I am really happy with your quick replies but isn't it cheaper and better to buy a engine by myself rather than kit? :/
Is there any better reason to choose 2-stroke over 4-stroke engines because 2-strokes are very inefficient and polluting?
Also, how powerful engine will be sufficient, 50cc or 100cc?
And do you have any idea on attaching a powerful horn?
It would be fine with some more time :)
 
Here is a four stroke kit that could work. You may be able to get a separate stingray 2 stroke mount plate and attach the four stroke engine mounting plate to that. No guarantees. If you simply buy a motor and no kit, you still need to buy a throttle, engine mount plate, reduction gear box, clutch, chain, sprockets, kill switch and many small items that probably will not fit together, wasting time and money.
Four strokes pollute the air less and there is no need to mix gas and oil. If you ride every day, mixing gas and oil can become very time consuming.
I weigh around 220 lbs and my 50cc 2 stroke engine cruises at 25mph with me. The 66/80cc 2 stroke will go faster. Most states in the US limit bicycle motor size to 50cc.
A bicycle shop has horns. If you really need a loud one, get a motorcycle horn and power it with a rechargeable 12v 5ah SLA battery.
http://www.bikeberry.com/gas-engine...g-pull-start-bicycle-engine-kit-4-stroke.html
 
Here is a do-it-yourself motorized stingray. It is simple and inexpensive, but it does not look very reliable or safe. His clutch is only a belt tensioner. The rider puts his foot on the pulley lever to tighten the belt enough to transfer power to the rear wheel. He must keep his foot on the pulley lever to power the rear wheel. The rear pulley, or sheave, is simply a bicycle rim attached to the rear wheel. This builder made (cut and welded) his motor mount. You may be able to adapt an existing engine mounting plate. A belt drive may slip a lot during the rainy season. Chain drive is better for a wet climate.
http://www.motoredbikes.com/showthr...tingray-custom-build-Tecumseh-3-hp-belt-drive
 
Ohk fine I agree with you that kits are reliable and better so I am getting a kit from Dubai, how much must the kit cost?
But, now I am confused between 2-stroke and 4-stroke engines.Will you suggest me which one to get and which type of engines has the most advantages?
I am looking for a easy hassle-free and most importantly fuel-efficient engine(atleast over 200 MPG) for daily use.
Is the Honda GX35 good enough according to my needs?
How much mileage does your 50cc 2 stroke engine give?
Also, what about brakes because ordinary brake won't work?
Lastly, can I choose my setup to be manual or automatic transmission, and if I can which one should I choose?
P.S:- I am ready to pedal hard if it improves my mileage, so is it possible to keep the pedals after the kit is installed?
I am really sorry if I troubled you which I guess I did :p
Thank you so much :)
 
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