rattling noise from conrod/gearbox

Discussion in 'Frame Mounted Engines' started by elwood, Jun 11, 2007.

  1. elwood

    elwood Guest

    anyone else have a similar rattling noise from the small pinion / gearbox area. its like a rattling noise with a few pings thrown in, kinda hard to explain. but its worrying me a bit,
    ive greased the gears really well and cleaned them etc.
    its makeing me wonder if its a piston knock or something serious??
    any help is appreciated, thanx! from elwood
     

  2. Guest

    Guest Guest

    At what speed? All the time, or only at higher rpm? One of mine makes a lot of gear noise, even after it's been greased. The other is much quieter.

    Check for looseness of the large slot head screw that holds the smaller gear in place.

    Check for loose engine mount nuts since a lot of us have heard pinging only to find the nuts were loose.
     
  3. Kielohawk

    Kielohawk Guest

    If its at higher RPM say above 20mph, I would check your piston arm upper bearing. Make sure you have no damage to the upper piston when you take the top of the jug (part where you spark plug threads in) off. My engine would run Ok under 20, but above 20 it would start rattling and it was the piston rotating and moving around in the cylinder due to a blown out upper bearing.

    Oh yeah, there is a very large flat head screw that threads into the small drive gear on the right side under the large clutch gear/plate panel. I found mine unscrewed and floating around rubbing against the cover which was making some noise after my first few hours of riding. Luckily it wasnt stipped too bad and I was able to loc-tite and thread it back in. You might check that.

    Dan
     
  4. Egor

    Egor Guest

    I had the big end pitch all the rollers out and bugger up all the internals, and this was about the first week, it seems if the engine lasts the first few weeks it goes a long time. All the supply-rs are good about the replacement if it is quick enough. Take off the exhaust pipe and look at the piston, while turning the crank with the bolt on the left side back and forth, see if the piston is at the same rate. Have fun, Dave
     
  5. elwood

    elwood Guest

    the noise is all the time, loader on tickover, i managed to shut it up for a bit by putting some sawdust in the gearbox but it soon came back after a 3 hour ride.i hope its nothing serious
    i checked the screw. nothins loose.
    any ideas??
     
  6. Guest

    Guest Guest

    Sawdust? Your joking right? Grease man, GREASE. Use some carb or brake cleaner and clean the sawdust out.....then grease it with litium grease.
     
  7. Egor

    Egor Guest

    I got a 54 Chevy truck with banana peals in the rear end. I was sure mad when I found out. Did not have fun, Dave

    PS: I think there was saw dust and Jello in there also.
     
  8. elwood

    elwood Guest

    anyone have any more suggestions? ive ran out of sawdust now and im having to cut wood to make it, havent tried the banana skins yet as i dont think they would work. i use the bike alot and its getting worse, the dust bareley lasts 3 hours and i have to do 5 hours tomoro
    from elwood
     
  9. Guest

    Guest Guest

    elwood the troll comes out from under his bridge to expound the use of sawdust...... :roll:
     
  10. elwood

    elwood Guest

    was there any need to call me a troll?
    i come on here to ask questions and you call me a troll.. im telling the admin
     
  11. azbill

    azbill Active Member

    I for one, could not tell if you were kidding or serious :???:
    if you were serious, please explain rationale of sawdust :shock:
    if kidding, then it was funny :p

    and you can tell augi anything you want...he already read this I am sure :lol:
     
  12. Guest

    Guest Guest


    I'd hate to think of what you would use a poo poo pipe for.
     
  13. Guest

    Guest Guest

    elwood, I'm sorry your skin is so thin you'd have to run and tell on me...what, are we 6 years old?

    Seriously dude, sawdust? Didn't you read the responses?

    Better yet, why don't you add some metal shavings as well, that will really quiet things down....
     
  14. srdavo

    srdavo Active Member

    edited quote:

    I believe in this act...BgJ was playing the part of the "Troll" :lol: :lol:
     
  15. elwood

    elwood Guest

    well the rattling has got really loud now, ive ran out of sawdust and grease, so i need a substitute to make it not so loud, and thankyou for appologising, also, what is a poo poo pipe???
    thanx
     
  16. srdavo

    srdavo Active Member

    it's like a poo poo platter..ya can't eat!

    I've heard this myth forever...ya put sawdust in a worn-out automatic transmission, to reduce slipping..long enough to sell the car.
    what kind of engine are you running?
    where exactly are you putting the sawdust?
    and, where is it going? (the sawdust)
     
  17. azbill

    azbill Active Member

    you could try super glue with the saw dust
    it'll be a lot quieter then
    or just pedal it
     
  18. Guest

    Guest Guest

    elwood, have you checked the big slot head screw that holds the smaller of the two gears on?

    There has been reports of some of them loosening, which can cause a rattling sound.
     
  19. Guest

    Guest Guest

    Re: it's like a poo poo platter..ya can't eat!

    I've heard it used to quiet the rear end (differential) in automotive applications, but then the whole works goes kablooie shortly thereafter.
     
  20. Guest

    Guest Guest

    See the above post.
     
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