Online: Soapbox2627

Evo Cam Installed

  • Sparra
    Sparra
    14 years ago

    Hey fella's...Seeing as I couldn't go to Edenhope and it's too wet down here to work today I put the new cam in my bike...Did everything as per instructions,fired it up and it ran fantastic...Just got back from a short ride and the difference is really noticable...If by chance I have done something wrong,would it have shown it's self by now or if there was something a miss would it run so sweet????There is also a distinct whirring sound now which I assume is the cam wearing in???

     

    Cheers...Sparra

  • DynaRider
    DynaRider
    14 years ago
    Cams do not "wear in".
    I am guessing you installed a cam with a new gear on it, as opposed to transferring the gear from your old cam.
    Not unreasonable in itself ,provided it is a suitable match.
    If the distinct whirring noise has only appeared since installation, it is quite likely an indication that the cam gears are "too tight",
    by which I mean the gear on the new cam is either slightly larger, or has a slightly different pitch.
    The pinion gears come in different sizes, and having, on a previous occasion, taken the oppourtunity to measure a large number of cam gears, there is a fair range there as well, not forgetting the 2 ring, 1 ring pitch issue.
    No doubt you installed a new cam bearing.
    What did you set the end play at?
    And...... what cam was it?
  • Sparra
    Sparra
    14 years ago

    Thanks for the reply...I installed an Andrews EV27 and a new bearing,as I didn't have a measuring tool I installed an .055 shim as per nightrider instructions...I do have a .050 and .060 shim that I could change over too if need be..

     

    Cheers...Sparra

  • Sparra
    Sparra
    14 years ago

    Thanks again for the reply...The cam came complete and the bike only has 8000ks on it...On the weekend If I get time I will take it out and swap the gear over...As far as end play goes I will see if I can find someone to measure it for me and go from there...

     

    Cheers...Sparra

  • grim
    grim
    14 years ago
    + 1 to putting the original gear on the new cam---cheers Grim.
  • DynaRider
    DynaRider
    14 years ago
    8000 kms is, as you know, nothing.
    I would......
    Run the original gear, nothing doubting. Make sure you scribe some marks for alignment.
    Check end play after fitting the original gear.
    You could do that with a vernier, if needed(and you take care to be accurate). Otherwise a dial gauge, or feeler gauge down the lifter hole.
    Use a thin threaded object of some sort(an old spoke is good) and pull the cam fully outwards, so that the gear is against the bush flange on the inside. Use a straight edge on the cam cover(like a steel ruler vertical across the ignition opening) and measure the depth with the vernier. Push all the way home, and measure again. You want between 5 and 10 thou.
    When all is said and done, it should be possible to easily slide the cam back and forth, indicating gears are not meshing too tightly, and that you have endplay.
  • Sparra
    Sparra
    14 years ago

    OK....I have managed to get the original gear off the shaft so before I take the new gear off the new shaft I will mark it for alignment...I was suprised to find that there is no keyway or such to stop the gear spinning on the shaft...When I put the original gear on the new camshaft if I put the shaft in the freezer for a while do you think that will shrink it enough for fitting the gear..This is all new to me and it would be an easy fix to just pay someone to do it but by doing it myself I am getting to know my way around my bike and for me thats what it's all about....Thanks for the help...

     

    Cheers...Sparra

  • DynaRider
    DynaRider
    14 years ago
    OK
    It is actually the gear that needs to be marked, not the cam.
    The cam has the cutaway, which is the reference you use to mark the gear. You need to create an index of some kind, to ensure correct cam timing.
    Interference fit only.
    I do not think you can shrink for an easy fit, but it would not really hurt. Put the gear in the oven as well.
    Make sure you lube.
    Are you using a press?
  • steve60
    steve60
    14 years ago
    sparra ,, i also just did the cam in my evo,, like you i put it in without measuring anything and just used a .055 shim,, it whined like my ex mrs,, so i pulled it back out
    took it to the bike shop, the guy took my old gear and put it on my new cam, measured up the 2 cams and shimmed it ,,cost me $14.00,, put all back together and is now beautiful,, i nearly fell over when they said $14.00, i would have paid $50 easy ,,