How low do you let your RPM drop at the apex on the street?

Discussion in 'The Perfect Line and Other Riding Myths' started by Drop_Center, Oct 5, 2017.

  1. JCool

    JCool Long timer

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    Would you ? :imaposer
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  2. NZRalphy

    NZRalphy Been here awhile

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    Yeah, I guess not.
    #42
  3. Jim Moore

    Jim Moore The Real Deal

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    I thought the question was legit, although I would have asked it a little differently. "What is your bike's redline, and what rpm do you shoot for while cornering" might have been a better way to put it.
    #43
  4. slartidbartfast

    slartidbartfast Love those blue pipes

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    To which the answer would still be "it depends". On a peaky mid-size supersport or small 2-stroke, trying to set a good pace, 2/3 to 3/4 max rpm would probably be a good answer. On a big, torquey vee twin, anything over 1/2 but on any big bike, on the street (as the original question was posed), you will be going plenty fast enough if you stick to around 1/2 red-line or even less. On my 1290SA it is almost pointless being in anything lower than 4th gear, regardless of RPM, because the available drive is enough to break traction or loft the front wheel without TC intervention.
    #44
  5. aldend123

    aldend123 Long timer

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    I think it's less silly than some are implying, but it's poorly worded. Seems like maybe he's trying to understand how much maintenance throttle to be applying from turn entry to the mid-point. Or he's really looking to understand what gear/power range to be in without realizing it.
    #45
  6. cabnfvr

    cabnfvr Adventurer

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    Dang, is this a trick question, like "How much can I pack on my bike." In 500,000 ish miles (which in itself is no indication of ability) I have never paid any attention to the RPM drop at the apex. Technically the lowest rpm for me is pre apex but I digress, I'm back to I don't know. Depends on the radius, the gear, do you feel lucky punk, and stuff like that. I did look at the speedometer once mid corner at Deal's Gap riding HARD on a perfect day and broke into audible laughter. It showed about 35 mph.

    Maybe I should ask Susan to look at the tach. She takes good apex photos so ......
    Mirror_Feelers.JPG
    #46
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  7. WindBlast

    WindBlast Cunning Linguist

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    At the apex you should be on the gas already.
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  8. Jim Moore

    Jim Moore The Real Deal

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    I think it's more a question of how much engine braking you want available as opposed to how much acceleration you have coming out of the corner. That being said, on my 600cc inline 4 those two are kinda the same. I want to be in the upper third of the rpm range, both for engine braking and post-apex acceleration. A big V-twin might be different. You could probably get away with being lower in the range for both purposes.
    #48
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  9. High Country Herb

    High Country Herb Adventure Connoiseur

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    I like this answer. It needs to be high enough so it isn't lugging, yet have enough rpm remaining to power out of the corner.

    In my case (Italian v-twin), I have a very wide usable range so it works very well. Anywhere from 4K to 9.5K through the corner.

    Some bikes have a narrow rpm range, and are forced to upshift somewhere in the corner.
    #49
  10. Tripped1

    Tripped1 Bitch called me a feminist.

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    Big twins live in the mid range

    This is my Multi 2-up and loaded just sort of cruising, I know that I am swinging back and forth between 3,500rpm and maybe 6,000rpm, you hear me kicking up a lot before corners to get a little extra engine braking...because I am loaded. Was I getting after it, I would be using a LOT more of the tach, and those kicks would be two or three gears. I MUCH prefer to be in a corner high on the tach vice low, if you are high, meh, MOAR THROTTLE if you are low you have to get it in the right gear or listen to the bike bitch, and I don't like the bike bitching.

    #50
  11. Jim Moore

    Jim Moore The Real Deal

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    Man, that's a nice-looking road!

    As a note, I think the rpm discussion is related to the (borderline crazy) trail-braking discussion. I think a lot of the guys in that discussion are riding around in the lower half of the rpm range. Nothing happens when they roll off the throttle so they're forced to use the brakes if they want to lose a little speed mid-corner.
    #51
  12. Tripped1

    Tripped1 Bitch called me a feminist.

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    That was actually why I had that video up, I was looking for what I had uploaded about 6 weeks on the road this year........something to do over the winter, though you can ride year around here. A lot of the passes (read good roads) are closed due to maintenance.

    ....and yeah, that road was glorious, definately worth the 8 bucks(!) that I paid to get onto it.
    #52
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  13. kneeslider

    kneeslider Long timer

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    Like some peoples wear apparel "depends!"
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  14. dietDrThunder

    dietDrThunder Why so serious, son?

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    As far as a low limit to let it drop to, the answer would be a bit above the rpm at which smooth acceleration is no longer possible. If we're on the track, the answer would be no lower than just above the happy part of the power band.

    For example, when I started racing I was on an FZR400. If you tried to exit a corner under 10,200RPM, the throttle was reduced to an engine sound changing device...nothing in the way of actual acceleration happened below that. later on, on my TL1000R, I could dip as low as about 5,500 IIRC if I was coming out of a very slow/high lean-angle corner (like T2 at Nashville, for those who have ridden there). On the SV650s, you didn't want to be exiting below 6,800 or so, and you didn't want to be revving over 10,400 or so...those motors don't have anything in the useful over-rev department.
    #54
  15. snarf

    snarf WFO and clueless

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    if going uphill, i keep the throttle pinned, and feather power with the clutch.

    Downhill, i shut the bike off and have a neutral coasting race as far as I can. Wheee!
    #55
  16. randyo

    randyo Long timer

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    drop ? my lowest rpm is at the point of curvature, from there, bike, car, whatever, I'm back on the throttle again

    if for some reason I came in hot, I'll downshift to keep my rpm up
    #56
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