centrifugal clutch questions

oldpot · Aug 7, 2013

OK , where i live there's a few inclines with traffic lights at the top and i do need to go there way , (luckily at the moment only had to stop 2x)and its hard to pedal off to get speed to let clutch out , so i thinking about a centrifugal clutch so i no need to pedal at lights etc etc,
i have seen lots of pics on how its done , but i a noob at this kind of thing but willing to learn (just set up my rear brake lights turn signals etc and really chuffed with myself i did that)but this is a different thing , how hard is it to do install the clutch,i not seen any videos on how its done

but again lots of pics etc,i just don't want to screw it up also,is there any video i can look at on installing one ??? also,

I want a centrifugal clutch that will let me still use the manual clutch so I can pedal-start the motor i heard they sell them somewhere ??,

and if i can get one that i still can use the manual clutch , will i need to widen my pedals (i know i would have to with a pull start )but that's more money for wide pedals i cannot afford at the moment ,(just spend 100 on other upgrades) again i just thinking about it and throwing some questions here .

GearNut · Aug 8, 2013

Installing the clutch as written in the instructions is not hard.
Getting the buggers to work reliably is a whole 'nother can-o-worms though.
Here's a little insight: Centrifugal clutch blues

crassius · Aug 8, 2013

I hear that in some places, putting on the centrifugal clutch classifies it as a moped with all legal papers needed for same. I try to avoid that. I also can't operate a pull start with my poor ol' arms, so prefer to pedal start the motor which can be a problem with some centrifugal clutch setups.

For hills, I've learned to adjust my routes a bit, or always turn to the right onto level ground at a stop on a hill, then make a u-turn and another right to get back to where I was going

mrfubs · Aug 8, 2013

If you want a centrifugal clutch you can disengage the output power to the wheels by using the clutch still but cannot drop the clutch to start it anymore, you will have to purchase a pull starter recoil kit aswell.

My opinion i think you would benefit best with out the centrifugal setup with the minute amount of power these engine produce.

I believe the centrifugal setup would be fit best for kids and such to where they can be limited on output speed/power.

The faster the engine spins the harder the clutch will grab(centrifugal force) and the faster starts you get. So say if you have a stock bicycle engine and slap a centrifugal clutch on it may take a while to get up to speed because the stock engine will run a very minimal amount of rpm to just engage the clutch.

Heres a video that will help you understand how the clutch works.

http://www.youtube.com/watch?v=3-SAGjUidZs
Its not my video.

Hoped i helped!

GearNut · Aug 8, 2013

The centi-clutch that I have in my garage right now came from the factory with a starter spring in it. It allows you to pedal start the engine. Once the engine is running it acts like any other centi-clutch.
No pull starter needed.

oldpot · Aug 8, 2013

crassius said:
For hills, I've learned to adjust my routes a bit, or always turn to the right onto level ground at a stop on a hill, then make a u-turn and another right to get back to where I was going

yep i done that a few times as well and i got a moped sticker for my bike as well

so mrfubs they don't sell them kind no more , i been looking around but it does not say if you need a pull starter as well , if so and i decide to get one , i will need wider crank ,i even been looking for a engine that already got them mounted ,

gearnut , i read the post and it frightened me for if anything goes wrong hehe,
now if i did get one in time and if it broke or was having too much problems with it (touch wood hope not) but can you revert back to a normal set up ??and take it out .
ty for your input

.

mrfubs · Aug 8, 2013

You need to understand how a basic centrifugal clutch works to understand that you need a pull starter.

Youre right though its hard to find a set! but i found a website/store in canada.

http://www.motorizedbicycle.ca/aftermarket-parts/centrifugal-clutch-and-pull-start-kit.html

and wide crank.

http://www.motorizedbicycle.ca/aftermarket-parts/wide-pedal-crank-kit-1-piece.html

if you live in usa you might have to email them and ask if they can ship to you.

Hope i helped!

wan37 · Aug 8, 2013

Here's where you can get both

http://www.ebay.com/itm/80cc-bicycl...Cycling_Parts_Accessories&hash=item2a26e539cc and the http://www.ebay.com/itm/Motorized-B...Cycling_Parts_Accessories&hash=item256a778b23 I have this set up for two years now and it's still going strong, but I'm the lucky one I think. I had a one piece crank so bought a shorter arm crank so it went under the clutch and pull start.

mrfubs · Aug 8, 2013

Here is a older thread on the same subject hope it helps!

http://motorbicycling.com/showthread.php?t=22661

oldpot · Aug 9, 2013

ty both of you for the links , i will read up and watch the video to learn more , i need to learn more before tempting this upgrade

.

so if i get one and it does not work out , can i go back to the way is was and take the clutch out ???.

mrfubs · Aug 9, 2013

of course you can! keep in mind that a centrifugal clutches are used in a wide variety of things, gocarts, mini bikes, chain saws, weed wackers, ect. its all the same concept! good luck!

wan37 · Aug 25, 2013

I know this a few weeks old but I had to say something. I have had a centrifugal clutch going on 2 yrs now and I can leave the manual clutch on the bike. I also can pedal start the bike. I do also have a pull start too. I added the pull start and the centrifugal clutch my self I bought them separate

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centrifugal clutch questions

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