DIY the cheap and ugly way.

looks good and simple from the video, thats what i like to see!

it looks like you dont have a clutch setup, and the roller is always enguaged.

i suggest a lift-clutch to pick the engine off the wheel so you can coast and idle the engine,

also, i didnt see a throttle. or was it just me?



well done
welcome to the boards
 
pocdragon said:
looks good and simple from the video, thats what i like to see!

it looks like you dont have a clutch setup, and the roller is always enguaged.

i suggest a lift-clutch to pick the engine off the wheel so you can coast and idle the engine,

also, i didnt see a throttle. or was it just me?



well done
welcome to the boards
Click to expand...

You are correct. I'm having a hard time with the throttle setup. I found temporary solution, but it's not perfect.
As for the clutch, well I don't have any. I'm not to sure how to keep the pressure downward and also being able to lift the engine at the same time...
I'm having some issues with the door hinge, it's not perfectly tight so the engine get's pushed against the tire...
 
Donor engine.
Poulan Pro DVM200VS 25cc 200MPH
2012-04-22%2017.37.46.jpg


First engine I take apart.
2012-04-22%2018.59.30.jpg


Took the carb apart and cleaned it.
2012-04-29%2011.32.17.jpg


Trimmed the plastic air filter.
2012-04-29%2012.42.55.jpg

2012-04-29%2012.43.07.jpg
 
Improvised roller.
2012-04-29%2012.07.28.jpg

2012-04-29%2013.41.43.jpg


The bike itself - old rusty beach cruiser.
2012-04-29%2019.56.57.jpg


The mount in development.
2012-04-29%2019.57.10.jpg


I used a 10" Zinc stair angle to make the engine mount.
2012-05-13%2010.21.30.jpg
 
update:

It goes up to 20MPH (GPS tested)
I still need to find a way for a clutch, or at least a way to lift and push down the whole mount on the tire to increase/decrease friction...

Painted the whole thing with some high heat paint resistant.
2012-06-11%2013.26.04.jpg


Painted the whole bike :p
2012-06-11%2013.26.13.jpg
 
Last edited:
Replace the baling wire with a strong bungie cord to maintain pressure against the tire and then attach a rod to the hinge that can be latched to the frame to pivot or disengage the engine contact. This concept seem to work for that bumblebeee bicycle engine guy and if you do a search you'll find pictures of what I'm saying.
 
i agree with knuckles. get a spring and turnbuckle, or a bungee to pull the motor down

throttles arent too hard dude. get an oversized brake wire (like 5-6 foot)

and use a brake lever you dont need a twist grip or anything
when you mount the sheath make sure it has enough slack to allow the motor to pivot witout the throttle pulling by itself (scary stuff)

here is my clutch on a similar build

picture.php
 
Thank you all for your replies...

a little update, this happened the other day while riding the bike.

314242_10151018504821350_708200792_n.jpg


so I didn't "play" that much with the bike.
I did put a bungee cord and it seems to help to create some friction.
that clutch system looks interesting.... I will look into it.

on a side note, a friend found another leaf blower (exactly the same one) in the trash and gave it to me.
 
fall down go boom?
i came close the other day,i was flying in the driveway,wife was heading out,managed to just miss,wiped dirt off fender with my knee.
im looking at building a friction drive too.
got 3 tanaka pumps coming soon.
 
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