Re: Why is my Motobecane 50V clutch area so loud?

rthor /
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If you have eliminated all of the other possibilities then you can safely say that the sound problem is bad crank bearings. Any imperfections in the bearing will make a noticible sound (sometimes enough to basically drown out the engine sound). Replacing these is a delicate procedure and does require surgical skill and patience. No special tools required: other than a jaw puller to pull the cases off each side of the crankshaft; a good punch to pound the old bearings out of the cases; a piece of hollowed pipe to pound the new bearing on the crank; and a torch in which to heat the cases and ease bearing insertion. (All of those tools that they show in the repair manual can be easily be substituted with everyday tools and ingenuity).

I've replaced the main bearings on two Moby engines recently and have effectively eliminated the sound problem.

Bearings and seals are available from RCV-Team for 29 euros (shipped) and from time to time, on Ebay.fr (same price).

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Subject Written By Posted
  Why is my Motobecane 50V clutch area so loud?Topic by: brystheguy brystheguy 09/28/06 12:40AM
  Re: Why is my Motobecane 50V clutch area so loud?Re: motochick motochick 09/28/06 01:52AM
  Re: Why is my Motobecane 50V clutch area so loud?Re: Ernie Wan Ernie Wan 10/28/14 04:43PM
  Re: Why is my Motobecane 50V clutch area so loud?Re: ಠ_ಠ Jon Folks ಠ_ಠ ಠ_ಠ Jon Folks ಠ_ಠ 09/28/06 02:39AM
  Re: Why is my Motobecane 50V clutch area so loud?Re: Willie Willie 09/28/06 02:47AM
  Re: Why is my Motobecane 50V clutch area so loud?Re: Gabe Gabe 09/28/06 09:58AM
  Re: Why is my Motobecane 50V clutch area so loud?Re: keller_stephen keller_stephen 09/29/06 03:37AM
  Re: Why is my Motobecane 50V clutch area so loud?Re: Hayden Stevens Hayden Stevens 09/29/06 05:18AM
  Why is my Motobecane 50V clutch area so loud?Re: brystheguy brystheguy 09/28/06 05:08PM
  Re: Why is my Motobecane 50V clutch area so loud?Re: Hayden Stevens Hayden Stevens 09/28/06 09:11PM
  Re: Why is my Motobecane 50V clutch area so loud?Re: rthor rthor 09/29/06 12:04AM
  Re: Why is my Motobecane 50V clutch area so loud?Re: 🇮🇹💦 Of the Loin 🇮🇹💦 Of the Loin 09/29/06 01:35AM
  Re: Why is my Motobecane 50V clutch area so loud?Re: Michael Dane Michael Dane 09/29/06 06:54PM
  Re: Why is my Motobecane 50V clutch area so loud?Re: matt madden matt madden 10/29/14 10:10AM
  Re: Why is my Motobecane 50V clutch area so loud?Re: Ernie Wan Ernie Wan 10/29/14 12:01PM
  Re: Why is my Motobecane 50V clutch area so loud?Re: scott middleton scott middleton 10/29/14 12:33PM
  Re: Why is my Motobecane 50V clutch area so loud?Re: Rebel Moby Rebel Moby 10/29/14 01:16PM
  Re: Why is my Motobecane 50V clutch area so loud?Re: Ernie Wan Ernie Wan 10/29/14 02:22PM
  Re: Why is my Motobecane 50V clutch area so loud?Re: Rebel Moby Rebel Moby 10/29/14 03:22PM
  Re: Why is my Motobecane 50V clutch area so loud?Re: javier f javier f 10/30/14 04:26AM
  Re: Why is my Motobecane 50V clutch area so loud?Re: scott middleton scott middleton 10/30/14 03:13PM
  Re: Why is my Motobecane 50V clutch area so loud?Re: matt madden matt madden 10/30/14 05:24PM
  Re: Why is my Motobecane 50V clutch area so loud?Re: matt madden matt madden 10/30/14 09:47AM
  Re: Why is my Motobecane 50V clutch area so loud?Re: Ernie Wan Ernie Wan 10/30/14 05:01PM
  Re: Why is my Motobecane 50V clutch area so loud?Re: matt madden matt madden 10/30/14 05:11PM
  Re: Why is my Motobecane 50V clutch area so loud?Re: scott middleton scott middleton 10/31/14 11:06AM
  Re: Why is my Motobecane 50V clutch area so loud?Re: javier f javier f 10/31/14 12:36PM
  Re: Why is my Motobecane 50V clutch area so loud?Re: Rebel Moby Rebel Moby 10/31/14 12:58PM

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