motorized xtracycle
- Thread starter oldanintheway
- Start date
Happy Valley
Active Member
Been done. Personally wouldn't recommend a frame mount, w/or w/out a shift kit, too long a running chain w/out weird tensioners or transfer hubs.
Doesn't mean it couldn't be done, that's just me as I stay away from HT engines for any bike.
Or how about electric?
Doesn't mean it couldn't be done, that's just me as I stay away from HT engines for any bike.
Or how about electric?
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oldanintheway
New Member
I like the 4 stroke. Ill have to think about the drivetrain some more. IE seperating the peddle chain from the drive chain so they would work independently. The stokemonky is out for the same reason as the big dummy frame. Thanks for the pics and reply..
POPS
Member
Happy
Where did you get the third picture, of the electric? Do they have a web sight to sell that kit ? Thanks >>>POPS
Happy Valley
Active Member
POPS
Member
Thanks alot HAPPY
I was really interested in that dual crank...POPS
I was really interested in that dual crank...POPS
I think you should go for with a frame mount. That is a long right chain, but it works with pedals, right? It looks like the shift kit would work.
mabman
Member
Keep in mind that in OR the legal cc limit for gas engines for motorized bicycles is 35cc. That means if you want to be legal then the HT engines are out anyway. That leaves the Subaru/Robin 35cc or the Honda 35cc which at this time can be set up like the above picture staton style or Gebe style, neither of which is going to work well in the front triangle or at all actually. You may be able to set up a Gebe in the rear triangle however it looks like? Hard telling from the pic but it would be the most legal alternative also because it would be an automatic drive which is also a requirement down there in OR. It leaves your current drive side alone which is good because it gives you your range of gearing to get around with without the motor or to help the motor out at the lower end and the top end too.
Putting an assist motor on a cargo bike makes all the sense in the world to me. I have ridden a fully loaded cargo bike and they are slugs off the line and uphills which is the very thing that the assist will aid. If you can wait a bit there may be a system coming down the pike that will suit your needs nicely and will be showcased in the Portland area later this Spring if all goes well.
As long as pics are being passed around this is the one extracycle one that caught my eye off of their site:
Putting an assist motor on a cargo bike makes all the sense in the world to me. I have ridden a fully loaded cargo bike and they are slugs off the line and uphills which is the very thing that the assist will aid. If you can wait a bit there may be a system coming down the pike that will suit your needs nicely and will be showcased in the Portland area later this Spring if all goes well.
As long as pics are being passed around this is the one extracycle one that caught my eye off of their site:
oldanintheway
New Member
Thanks Pablo and Mabman.....I think the in frame with a shift kit would go in easy, and im not particulary worried about the long drive chain. I could use a beefed up bmx chain and probably be ok. The issue for me i guess is the leagality in or. This bike has become my regular rider. We go shopping , picnicking etc and it usually has sumthin in or on the carrier or bags. Soooo, im leaning twards the suburu or honda motor. Now to come up with a mount. It looks to me there is plenty of room and a number of practical mounting points available. The real quandry for me is the drivetrain. Im not sure how an (automatic drive ) works and if you could suggest where i might find a discription or some pics that would be great. I can figgure how to drive the rear wheel but just unsure haw to incorporate the gears wo a jackshaft, which i dont want. I guess i need to get more familiar with how the gebe and station driveterains work. Would one of those options allow me to use the bike and gears without the drag of the clutch .?? i dont care about the weight, its a cargo bike LOL... Jeff
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mabman
Member
Gebe info here: http://www.bikeengines.com/
In order to be legal you will not be able to plumb the motor drive in to your bikes drivetrain, it is being done all the time however at this point and while I see no harm in it personally, the letter of the law reads differently.
So look at it this way. If you use a system like the gebe where your motor drive is off the left side of the bike you are separating the motor drive in to a single speed situation? But the human side can have as many gears as necessary and what that will do is complement the single speed, and thereby automatic also, aspect of the motor whereby you can help get up to speed by pedaling while accelerating and keeping pace with the rpms/torque of the motor by pedaling alongside the motor drive which is what I term Motor Assist. If you want a motorized bike with an auto drive you may still have a gear on the human side that will help to launch off the line, but run out of gearing shortly after and just let the motor do it's thing. Both have positive results but as you may discern the MA system will ultimately yield better mileage and allow for some fitness gain also?
These are just my findings based on my experience with this bike:
Which has a 49cc 1.5 hp 4 stroke Hua Cheng and is legally non-compliant due to the motor being plumbed to the freewheel. The Robin engine weighs 4 lbs less and is rated at 1.6hp in comparison. I always shift down to mid range when stopping to get some off the line torque, which including pedaling I find myself getting up to speed faster than the cars I am lined up next to at the stopsigns/lights. However I run out of gearing fast, say 25 mph and until I drop back to that speed pedaling is basically a placebo. Alot of this is due to the 20" rear wheel and its affect on the final gear ratio's available but when you separate the drives as I said before it is much easier to find a gear with resistance on the human drive side to complement the motor drive at all times.
In order to be legal you will not be able to plumb the motor drive in to your bikes drivetrain, it is being done all the time however at this point and while I see no harm in it personally, the letter of the law reads differently.
So look at it this way. If you use a system like the gebe where your motor drive is off the left side of the bike you are separating the motor drive in to a single speed situation? But the human side can have as many gears as necessary and what that will do is complement the single speed, and thereby automatic also, aspect of the motor whereby you can help get up to speed by pedaling while accelerating and keeping pace with the rpms/torque of the motor by pedaling alongside the motor drive which is what I term Motor Assist. If you want a motorized bike with an auto drive you may still have a gear on the human side that will help to launch off the line, but run out of gearing shortly after and just let the motor do it's thing. Both have positive results but as you may discern the MA system will ultimately yield better mileage and allow for some fitness gain also?
These are just my findings based on my experience with this bike:
Which has a 49cc 1.5 hp 4 stroke Hua Cheng and is legally non-compliant due to the motor being plumbed to the freewheel. The Robin engine weighs 4 lbs less and is rated at 1.6hp in comparison. I always shift down to mid range when stopping to get some off the line torque, which including pedaling I find myself getting up to speed faster than the cars I am lined up next to at the stopsigns/lights. However I run out of gearing fast, say 25 mph and until I drop back to that speed pedaling is basically a placebo. Alot of this is due to the 20" rear wheel and its affect on the final gear ratio's available but when you separate the drives as I said before it is much easier to find a gear with resistance on the human drive side to complement the motor drive at all times.
