Centrifugal Centrifugal Clutch worth getting?

Discussion in 'Transmission / Drivetrain' started by StrontiumEthics, Apr 26, 2012.

  1. StrontiumEthics

    StrontiumEthics Motored Bikes Sponsor

    Since I deal with quite a bit of stopping and starting here in Philly, I am really considering getting a centrifugal clutch. I was wondering if it will hold up good to a 36t sprocket? Will I loose any low end if I maintain my same setup (40t) and just change the clutch?

  2. Al.Fisherman

    Al.Fisherman Active Member

    We've having a discussion on a CC at this moment. I know that they sell them, and members installed them, But for the life of my I can't see how they will last. Maybe the one we are in discussion with has a flaw in the manufacturing process. Have no idea as I can't put my hands on it.

    Look here.... http://www.motoredbikes.com/showthread.php?t=37532
  3. motorpsycho

    motorpsycho Active Member

    I just wanted to post my opinion on this subject, altho i am by no means an expert on centrifugal clutches.
    I think it all depends on the type of clutch it is and what materials are used.
    Like, if it's an old belt style centrifugal clutch (like what used to be on old rupp minibikes and snowmobiles) it will probably last a long time.
    if it's a moped / scooter style ( or drum style clutch with friction pads) i don't think it would last as long because the friction pads will wear out and the spring or springs can get weak.
    of corse, on an old style belt c. clutch, the belt will eventually wear out, but there are less moving parts, and probably less heat than in a drum style c. clutch.
    Heat is a clutches worst enemy.

    again, i'm by no means an expert on this at all.
    I'm sure that both styles of clutches have decent life spans, but i think a drum style would wear out sooner than a belt style would.
    and then of corse, figure in the quality of the components used to make the c. clutch for m.b.'s.....the parts are probably not the highest quality.
    just my thoughts.

    a belt style centrifugal clutch:

    two different drum style centrifugal clutches:
    Last edited: Apr 26, 2012
  4. Al.Fisherman

    Al.Fisherman Active Member

    motorpsycho..I agree with your assessment, but working on HT's..if that is what the OP has...we are limited with this. Although with some major modification (nor really worth it) a belt driven clutch can be done.

    Attached Files:

  5. motorpsycho

    motorpsycho Active Member

    I see, I never really knew what style c. clutch was available for a h.t.
    I personally think a belt drive clutch would be the way to go, IF it wouldn't be too difficult to make.
    but again, i'm no expert.
  6. StrontiumEthics

    StrontiumEthics Motored Bikes Sponsor

  7. wheelbender6

    wheelbender6 Well-Known Member

    I have a boygofast C clutch on my China girl. the C clutch makes my 10 mile, high traffic commute much easier. You can still pedal start the motor with the C clutch.
  8. andrew5826

    andrew5826 New Member

    I like manual clutches alot better than centrifugal ones. I don't know about your motor but on mine if the stall is too low there's no power at all and if it's too high when your going up hills the clutch just slips in the bell trying to grip while burning the pads up. Manual clutch u can have whatever stall you want plus their a lot more fun at least for me.
  9. Fabian

    Fabian Well-Known Member

    Ahh, but Andrew, the stall can be adjusted with different tension springs, should you require the stall speed be adjusted.

    Typically 2-stroke motorized bicycle centrifugal clutches stall at around 2200 rpm; some lower, some higher.
    I have not found any problem with stall speed but then again, i have a SickBikeParts shift kit, so in my situation it's not an issue.