Engine Sprocket Question

Discussion in 'Transmission' started by Pigsticker, Jan 31, 2011.

  1. Pigsticker

    Pigsticker Member

    5
    0
    0
    On my 2009 FLHX I believe the stock engine sprocket is 34 teeth and I have been told that anything you find on the market to reduce the engine sprocket size to 30T converts the compensator to a solid mount sprocket!

    If this is correct what could this mean as I have freinds who lowered the final drive by the engine sprocket and have not had any issues..

    Thanks
     
  2. Hoople

    Hoople Account Removed

    7,198
    0
    34
    Is direct drive without any shock absorption, something you really want with late model pressed crank pins.? I can't see it as being anything beneficial.
     
  3. Jack Klarich

    Jack Klarich Expert Member

    18,544
    153
    399
    That is one of the reasons older Sportsters vibrated so much, they had no comp sprocket
     
  4. geezer

    geezer Senior Member Contributor

    1,623
    68
    52
    When I spoke to Evolution Industries who is 1 company that I know who makes them said guys with the softails were taking them off because of the vibrations but they worked OK on the touring bikes with the IDS.
     
  5. BUBBIE

    BUBBIE Well-Known Member

    4,959
    83
    113


    I would NOT go Direct sprocket off engine, even with MY 09 having rubber rear cushion...
    The crank issues is for #1 and the Vibration is #2.
    The ISSUES might NOT show up for a long while but they WILL..

    That motor NEEDS a SOFT go-between,,, Hence the Compensator that Helps from Jar breaking movement on tranny clutch and the Crank. AND the BiggE LUGGING the Bike.

    If HD could get a NO-COMP to work well, they would have been on the bike Now and saving that much money per bike tells me that direct drive gear ISN'T something they will do again...

    Read or ask a little about how geezer is doing with his modification and his goals.. 6 gear at 60MPH without Lugging..

    He has a gear being Made that will replace the stock sized one,,,More teeth on his clutch basket and that means LOWER gear ratio change without Loosing the compensator.. Much Better Way In OUR opinions.. Aye?

    signed....BUBBIE
     
  6. Hoople

    Hoople Account Removed

    7,198
    0
    34
    Unless your making it yourself, it won't be cheap to make a custom gear and have it properly heat treated. (Isn't that gear part of the clutch drum itself?) Looks like a monster project just to change the ratio.

    What is the advantage of doing it that way instead of just using a larger off the shelf rear wheel sprocket and longer belt?
     
  7. Pigsticker

    Pigsticker Member

    5
    0
    0
    I went to the dealer to discuss gear reduction. The dealer recommended the crank sprocket vs. belt pulley as they claim many have did this gear mod and been happy with the results?!

    Talking to a mechanic he also felt this was OK since the motor was only 96 with small cams and the 09 has the rear rubber belt compensator.

    You would think the dealer would advise new-bee's of the pros and cons before recommending..

    What you all have said makes sense to me but maybe if you drive the bike right without jumping on it all the time it will last without issues.
     
  8. geezer

    geezer Senior Member Contributor

    1,623
    68
    52
    I'm going this way because it is cheaper and easier than the belt and pulley option. Yes the sprocket is part of the clutch assembly but it's only held on with 6 rivets so not hard to remove. Just a matter of taking the primary cover off and it's all right in front of me. If I was to change the other way I might have to change both the tranny and rear pulley to get the gearing I want which means I end up taking the inner primary, starter, swing arm and rear wheel off so I can change belt lengths. That's too much work for me. The speedo calibration doesn't change when staying in the primary. I might lose the 6th gear light but that's not a major issue with me. Time will tell how well it's going to work.
     
  9. Hoople

    Hoople Account Removed

    7,198
    0
    34
    Sounds like an interesting project. The mph range of each gear will be narrowed (more shifting) but you should feel a big increase in applied torque when you get finished. I don't know how may teeth your adding to the basket gear but even a few will yield some added torque. And that's always Fun!:)
     
  10. geezer

    geezer Senior Member Contributor

    1,623
    68
    52
    I'm adding 7 teeth to the sprocket. I was going to go with 6 but I don't want an offset link in the chain. I had to settle somewhat to get an even number of links in the chain.