1. 4 Stroke Husqvarna Motorcycles Made In Italy - About 1989 to 2014
     TE = 4st Enduro & TC = 4st Cross

Front vs Rear Sprocket Size Change

Discussion in '4 Stroke' started by MrClean, May 5, 2010.

  1. MrClean Husqvarna
    AA Class

    Location:
    So Cal
    On my '09 TE310 I went up to a 14t counter sprocket in order to gain a little more top speed. But, in some situations, I really don't like how tall first gear is now. So, I'm going back to the stock 13t CS.

    Here's my question... Should I try a smaller rear sprocket in order to get a little more top speed? Or, will 1st gear be right back to where is was with the 14t CS? (Too tall.)

    It seems to me that a smaller rear sprocket will positively impact the top speed much more than it will negatively impact 1st gear. (Since the number of revolutions for the rear sprocket is much greater in 6th gear vs 1st gear.)

    Can anyone tell me from experience what happens when dropping 2 or 3 teeth on the rear sprocket? How much gain in top speed? How much taller is 1st gear?

    I'm really only hoping to gain 5mph on top without loosing too much in 1st.
    MrClean, May 5, 2010
    #1

  2. Motosportz CH Sponsor

    Location:
    Vancouver WA
    Husqvarna Motorcycle:
    2021 TE250i, 570 Berg, 500 KTM, 790R
    Other Motorcycles:
    many
    3.5 rear teeth = about 1 front. So if you went one or two smaller you would gain a little top but loose less bottom.
    Motosportz, May 5, 2010
    #2

  3. MrClean Husqvarna
    AA Class

    Location:
    So Cal
    Understood.

    What I'm trying to figure out is... Would a 3.5 tooth smaller rear sprocket perform *exactly* like a 1 tooth larger front sprocket?

    It seems to me that a 3.5 tooth smaller rear sprocket would be a much better choice than a 1 tooth larger front sprocket.

    My thinking may be completely wrong. Please let me know if it is.
    MrClean, May 5, 2010
    #3

  4. dirthead1 Husqvarna
    AA Class

    Location:
    san diego
    How many teeth is your rear sprocket?
    dirthead1, May 5, 2010
    #4

  5. Motosportz CH Sponsor

    Location:
    Vancouver WA
    Husqvarna Motorcycle:
    2021 TE250i, 570 Berg, 500 KTM, 790R
    Other Motorcycles:
    many
    No it is not. It's going faster and faster or you would be going the same speed. It is the final gearing. When you shift up the CS and rear sprocket both go faster. the ratio between them remains the same.
    Motosportz, May 5, 2010
    #5

  6. MrClean Husqvarna
    AA Class

    Location:
    So Cal
    Right. Of course. I just had a 'Duh' moment. Thanks.
    MrClean, May 5, 2010
    #6