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Thread: 2015 Sr400 rides

  1. #1

    2015 Sr400 rides

    Hey all,

    Wasn't sure where to post this. I just recently got a 2015 SR400. I love the bike, but as most know speeds aren't this bikes specialty. I have been commuting it to work ~25 miles, 15 of which are freeway miles going about 70-75mph trying to keep up with traffic. From what I've read it seems the sweet spot is around 4/5 RPMs. At the speed I'm riding at I'm trying to keep it below 5500. Will this have long term negative effects on the engine? I'm hoping to be able to ride it this year to BRO. I went the last couple of years but took my friends harley which rode the 300 miles with no real issue.

    Thanks for any input!

  2. #2
    Hi,
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  3. #3
    You could try to change the bikes final drive gear ratio a little by going up one on the front sprocket...to a 20 tooth sprocket from memory.

    That could alleviate the stress on the engine a bit and allow lower revs for the same speed.

    Is the 400 stock?

    SR
    ...'Any unnecessary items on the bike, that it doesn't really need, shouldn't be there!'. (Café racers creed). SR..

  4. #4
    Not 100 percent. The guy who owned it before me removed the center stand, got a much louder exhaust and welded off the rear pegs

  5. #5
    Give the one tooth larger front a go...see how you go with that...pipe might help pull the gearing as well.

    SR
    ...'Any unnecessary items on the bike, that it doesn't really need, shouldn't be there!'. (Café racers creed). SR..

  6. #6
    How hard is it to do something like that?

  7. #7
    Senior Member MadMax's Avatar
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    Quote Originally Posted by Finessevanes View Post
    How hard is it to do something like that?
    Very easy if you've got tools, about $20 for a sprocket and tab washer and about an hour of your time.

    Buy yourself a Haynes or Clymer manual for the 500, most of the chassis & mechanicals for the 400 are identical, the only thing not covered is F.I.

    Max

  8. #8
    Last edited by stewross; 08-12-2017 at 03:22 AM.
    ...'Any unnecessary items on the bike, that it doesn't really need, shouldn't be there!'. (Café racers creed). SR..

  9. #9
    Quote Originally Posted by MadMax View Post
    Very easy if you've got tools, about $20 for a sprocket and tab washer and about an hour of your time.

    Buy yourself a Haynes or Clymer manual for the 500, most of the chassis & mechanicals for the 400 are identical, the only thing not covered is F.I.

    Max
    I've recently contacted Haynes about doing a supplement for the efi models, but they said they had no plans.

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