Comparisons chain drive to friction drive.

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Torques

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#1
I have a friction drive bike that I am very satisfied with except for the fenders trying to contiually try to break off due to the speeds (vibration) I travel. I was told negative things about chain drives which might or might not be true. The one thing I don't like is the bulky transfere case, just my opinion. I currently have 2700 miles on my eho35 friction drive since brand new in August. I also break a spoke on the engine side, every 3 weeks or so can anyone give some input to pluses and minuses between the two. I have a back fender on now but is ready to break off again. The pic is an early shot without fender. Later I fit the rear fender on.

http://i93.photobucket.com/albums/l69/Torques/CIMG2906.jpg
 

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Edward

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#3
No. I just went with the in frame design for the appearance. I've never had a spoke break or a fender break but I only use Wal-Mart and Toys-R-Us Schwinn/Pacific Bicycles. No carbon fiber aluminum titanium bikes for me, I'm a purist. I really should make a frame or alter one but the time and means have been elusive, but stranger things have happened. The 4 stroke seems to have the edge on longevity and vibration, it just needs some of the contraption shook out of it, for the look thats more my cup of tea.
 

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gone_fishin

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#4
heck no, this ain't no "chain-drive only" messageboard, sorry i letya sneak by me :?

this is a motor'd-biker's forum, period...welcome :D

that is one bad-*ss rack-mount bike, Torques, please use our "upload picture" feature & put that in the "picture gallery" 8)

(your probs sound like basic high-speed bicycle woes, always check yer spokes, brakes, tires, etc...before & after every ride)

PM Tom with your engine-type so he can add it to the list, & then you can put it in your profile :)
 

Mountainman

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#5
Hi Torques -- I have the same engine and drive unit as you -- no problems yet -- been riding almost everyday.. I like the looks of your bike -- but I am wondering -- if I should paint my engine cover ? Yellow is a safe color -- but I am wondering ?? Happy Riding from - Mountainman
 

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#6
Mountainman,
Whew! Talk about thread mining. Have you noticed the dates on those posts? HAHA.
But since you brought it up, I just painted my Subaru semi-flat black. I wanted something a little more stealthy looking. I noticed last week when my son was riding it, from way down the street that yellow motor shroud stuck out like a sore thumb. Very noticeable from 1/8-1/4 mile! That's great if Hi-Vis is what you're looking for. As for me the less attention to the motor feature the better. I painted the shroud and tank black and it kinda disappears from the distance. That having been said, I wear a bright yellow/green safety vest with glow in the dark stripes. And just ordered a xenon yellow strobe for the rear of the bike. Maybe those things will draw the attention away from, and/or blind someone to the motor. Then too, stealth may not be all it should be as the engine noise and bike speed is a dead give away that something's different about these bikes!
Cheers! WC
 

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TWalker

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#7
I would think a friction drive would be least prone to vibration of any set up. It actually has a big rubber connection to the bike.
 

ozzmonaut

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#8
I can see that this thread dates back a ways but i was surfing for info and found this and thought i'd enter my piece. I've had the same friction drive bike for almost 7 years now and have achieved speeds over 35 mph and have never broken a spoke . Not only that but I have a rear fender and it has never broken or came off. And my drive wheel on the side of the engine has a plastic shroud over it to eliminate the spray of road grit and that piece has never come off.. If pieces are breaking i would look into buying or making some better motor mounts. For whatever all this is worth
 

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#9
I am thinking of putting a mirror on my bike .Do you have to go that big for it to work ok.I thought about one of those that velcrow due to the tight space in my Garage.
 


Mountainman

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#11
yes -- this thread goes way back

I would think a friction drive would be least prone to vibration of any set up. It actually has a big rubber connection to the bike.
yes -- don't see where friction would be any worse on the spokes
than our body weight ??

broke a couple of spokes right in the beginning of my MB adventure
I was thinking at that time -- oh no is this going to be happening often ??

but -- I haven't broken any since

as we ride those THINGS
 

loquin

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#12
Friction Drive Vibration

The one vibration issue I've seen with friction drives is how the roller interacts with the tires - if you have a slick tire, like the Inova swiftor, vibration is just about zero. Or, if using an inverted tread, like the Serfas Drifter or the Continental Town & Country, which both have a 'slick' center portion, the vibration is also very low. Or if you have a tread which runs at 90 degrees to the roller (around the tire, rather than straight across the face of the tire,) your vibration is also low. If the tread runs diagonally across the face of the tire, (Maxxis Hookworm, for instance,) vibration should also be low.

Two other tires which should have low vibration are the Michelin Pilot City and Michelin City tires.

However, IF you're using a tire where the tread pattern across the tire, so that the roller is aligned with the tread (and thus 'falls' in and out of the tread, you'll get vibration. Maybe SERIOUS vibration. The tires that Torques pictures looks like they will allow this vibration. Mountain bike tires can be especially bad. The Kenda Small Block Eight tire would be very bad, for instance.
 

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SirJakesus

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#14
Town & Country tires only give slight vibes when you increase spindle pressure a lot. Thats usually how I can tell quickly if my deflection is too great.
 

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#15
Speaking Of Motored Bike Vibration...

Speaking of vibration... I just put a DE TLE43 kit on my bike a couple weeks ago (wish I would've found out about their kit years ago), and after an hour or so my hands are pretty numb from the vibration (just like riding any other 2 stroke, I guess).

Anyways...anyone have a good brand of vibration dampening grips they could recommend? I run Serfas inverted tread and Kenda Kross hybrid slicks, so my tire vibration has been almost intangible. I already bought some medium-padding cycling gloves, and they help...but I've been riding my bike daily (40+ miles) for the last couple weeks and my hands are kind of going perma-numb... Any good grips out there?
 
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#16
Some say to fill the handlebars with lead shot...I have no personal experience, most of my vibration is in the seat for some reason!
 

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#17
That's a pretty good idea Ed! I was kind of wondering if anyone had tried filling their handlebars with some kind of vibration dampening material..

Before I use up my last box of birdshot (ammo is SO expensive right now), I think I'll try experimenting with some thicker, jell-ier grips...maybe even get rid of the racing seat and try something more comfortable..

But if push comes to shove, I'll definitely give your idea a try!

Thanks again,
John
 

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#18
Has anyone tried sand or pouring molten lead inside the bars ? With lead shot, do you pack them in really tight or a little loose. I would think tight. I'm also thinking shot might be better than pouring molten lead in them. I would think shot, even packed tight would still have a tendency to move a little, absorbing a lot of vibration. Just my thoughts. I have bunches of lead ingots along with melting pots and pouring ladels.
 

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#19
I had an aluminum handlebar, my fingers would go numb from vibration. I switched to a steel BMX steel 6 inch handlebar, problem solved.
 

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#20
Speaking of vibrations.....

I have a GP460 friction drive, the high revving little 2-stroke shakes me numb even on very short rides....:ack2:I hope you guys come up with a good vibration dampening idea:D
 


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