Curious Tranny Noise??

Discussion in 'Transmission' started by fpd4308, Jul 12, 2010.

  1. fpd4308

    fpd4308 Member

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    So I have been hearing a funny noise coming from the primary area of my bike. Kind of between a chirping and a clacking noise it seems to occur when cruising at speed down the road. Also when downshifting to second with clutch in I get the noise until I add power and let the clutch out. I have a closed belt primary with a dry clutch so it always seems to make a little bit of a ticking noise when the clutch lever is out but I am noise paranoid so I thought I would see of anyone had an suggestions. I would hate to have a tranny go and wipe me out at 65mph.

    Thanks for all the help
     
  2. HDDon

    HDDon Experienced Member Contributor Retired Moderators

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    Are you running a chain or belt final drive? How are you venting your primary?
     
  3. fpd4308

    fpd4308 Member

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    Chain Final drive, and I am not really sure about venting the primary. The drain plug is removed from the primary if that is what you mean?
     
  4. HDDon

    HDDon Experienced Member Contributor Retired Moderators

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    Most of the belt primary drives I've seen have been open to the air, with a guard sometimes added to the outside. I've been told that they are open for two reasons, 1. They look really cool and old school. 2. It helps to cool the belt and the clutch. Maybe its not necessary I've just always been told that it was.
     
  5. fpd4308

    fpd4308 Member

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    Ok I see what you are saying. The design of this one is such that the starter jack goes into the hole in the stock primary cover otherwise the starter jack wouldnt have any support at the end to keep it from catching and breaking off when starting...unfortunately I learned this from experience....lol
     
  6. Jack Klarich

    Jack Klarich Expert Member

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    What type of dry clutch and is this a 4 or 5 speed? 4 speed dry clutches with open or vented primarys were pretty noisey
     
  7. fpd4308

    fpd4308 Member

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    It is a 5 spd...might just be the nature of the beast
     
  8. Jack Klarich

    Jack Klarich Expert Member

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    Early 5 speeds were noisey, throw in a dry clutch with belt drive and vented or open primary you got noise
     
  9. mrtn681

    mrtn681 Active Member

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    My FXST has an encosed belt primary. It is always clicking and squeaking and generally making me think something is wrong. Just make sure the derby cover is vented or it could get too hot.
     
  10. fpd4308

    fpd4308 Member

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    Thanks for the advice I will have to shop around for a vented derby cover. I also took out the bike today and narrowed down the noise so maybe that will help.

    When in neutral with the clutch lever out the clutch/transmission seems to chatter. Pull in the clutch lever and chatter goes away. Doesnt seem to do this while moving in gear.

    When down shifting to second or first I get a slight sound like marbles rolling around. Seems only to do it when downshifting into those two gears and it is only slight. Seems like if I hold the clutch in for a few extra seconds before downshifting it lessens even more.

    Hope that is a tad more specific than my first post.

    Doug