Question.99' LC4 Enduro Rattle 5th gear low rpm

Discussion in 'Thumpers' started by Clayman18, Mar 28, 2013.

  1. Clayman18

    Clayman18 n00b

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    I just got a 99 Lc4 Enduro, has 12000 miles oil changed every 2500 miles and bearing replaced at 3,000 miles. This thing runs great! Valves Adjusted Every 4,000 Miles. I noticed today on the highway at 50 mile an hour shifted into 5th and rolled on the throttle and a clatter sounds like right side and maybe topend. It sounds like maybe timming chain? it stops once its not lugging or the RPMs plane out. This normal?
    #1
  2. bomber60015

    bomber60015 Anatomically Correct

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    pre-ignition? have you changed the brand of gas you're using?

    lugging the engine is bad. Stop it.
    #2
  3. Clayman18

    Clayman18 n00b

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    lol I only use 100% gas Premium octane. I'm not really lugging it, I can be going 65 and roll on throttle and it will clatter until the RPM levels out then quite again.
    #3
  4. Droptarotter

    Droptarotter Long timer

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    Are you sure it's not the drive chain slapping the swing arm slider??

    Cheers
    #4
  5. Clayman18

    Clayman18 n00b

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    Yeah I checked drive chain.
    #5
  6. dolphins13

    dolphins13 orange rules

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    If your geared at 17/42 or even 16/42? That is lugging on my bike. (I have a 99 lc4e and its perfect) I have 16/42 and my bike cruises at 50 in 4th and I dont hit 5th til 60. If my cruise goes under 55 then I'm hitting 4th again. 17/42 would be really lugging in 5th at 50mph? Not sure about your noise tho? Hope it's nuttin serious?
    #6
  7. Clayman18

    Clayman18 n00b

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    Yeah Dolphin you probably right its not to peppy in 5th going 50, as I said I just got the bike not use to the whole enduro scene. I'm going to put some good miles on this weekend and get a feel fo the thing! As of now tho im liking it alot!
    #7
  8. Droptarotter

    Droptarotter Long timer

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    If you are lugging the motor...........that drive chain will really slap around and hit the swing arm............have another look at that........well.....don't really look at it while riding!!:eek1

    Just try revving the bike higher in lower gears and see if the problem dissapears.

    Cheers
    #8
  9. ChrisC

    ChrisC Amal sex?

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    Putting a 4 mm thick piece of closed cell foam between the plastic slider and top of the aluminum swing arm will really reduce any noise from the chain impacting the slider... :deal
    #9