Welcome to NESR! Most features of this site require registration, including replying to threads, sending private messages, starting new threads, and uploading files. Click here to register.

Results 1 to 13 of 13

Hard acceleration

  1. #1
    Lifer SEVENSGT's Avatar
    Join Date
    Jun 2002
    Location
    Warwick, RI
    Age
    48
    Posts
    3,216

    Hard acceleration

    Why is it when I see a Harley(not just a cruiser, but actually just Harleys) when they romp on the throttlethe top of the bike leans to the right, kinda like the tourque is twisting the bike? Seriously, like 6 or 8 bikes I've been around in the last week seem to all do this, is it just the idiot contolling the bike, or does it have to do with the massive transmissions

    0 Not allowed! Not allowed!

  2. #2
    Littering and........
    Join Date
    Jul 2004
    Location
    Vermont
    Posts
    7,188

    Hard acceleration

    Hehehehe....you said hard.

    Having never ridden a Harley, I cant tell you for sure, but I think you're on the right track with the massive tranny theory. Those things still work on 1950's technology, so I'm sure there is a good amount of torque steer/twist.

    I've noticed that when riding behind them myself.

    0 Not allowed! Not allowed!

  3. #3
    Angry Gumball RandyO's Avatar
    Join Date
    Jul 2001
    Location
    Farmington, NH
    Age
    71
    Posts
    18,028

    Hard acceleration

    I think it's cause the rider is tending to push on the handlebar as he twists the throttle due to the forward control system and the ape hanger handlebars ... and you know they are always low on blinker fluid because they have self cancelling turn signals. and quite possibly as you know ,they always exit both exausts to the right handside, maybe its due to both mufflerbearing being on the right hand side of the bike

    I don't think it has anything to do with engine torque, they mounted the engine in away that the massive torque would keep it from lofting the front wheel.

    If the motor was mounted like a Guzzi, I'd agree

    0 Not allowed! Not allowed!
    RandyO
    IBA#9560
    A man with a gun is a citizen
    A man without a gun is a subject LETS GO BRANDON

  4. #4
    Just Registered
    Join Date
    Jun 2001
    Location
    Is it not obvious?
    Age
    46
    Posts
    3,236

    Hard acceleration

    I'm with Randy, I think its just the HD clan flapping away.

    Ever seen it happen with a 100lb rider?

    0 Not allowed! Not allowed!
    My 2 vices, not necessarily in order:
    www.gpsdiscussion.com
    motorcycleaddicts.org

  5. #5
    Lifer Karaya One's Avatar
    Join Date
    Jul 2001
    Location
    Springfield, Mass
    Age
    57
    Posts
    3,091

    Hard acceleration

    1950's technology? Talk about being generous!

    More like WW1 technology. The only difference is the better quality metals of today.

    0 Not allowed! Not allowed!
    Putting his hands in the air, like he just doesn't care.
    Check out my eBay store!
    Dave - Motorace - Michelin

  6. #6
    Just Registered TLRMan's Avatar
    Join Date
    Jun 2001
    Location
    Northshore/Beverly, MA
    Age
    65
    Posts
    2,005

    Hard acceleration

    Originally posted by Karaya One
    1950's technology? Talk about being generous!

    More like WW1 technology. The only difference is the better quality metals of today.
    And thank God for engineers in Germany!

    0 Not allowed! Not allowed!

  7. #7
    Lifer Karaya One's Avatar
    Join Date
    Jul 2001
    Location
    Springfield, Mass
    Age
    57
    Posts
    3,091

    Hard acceleration

    Exactly!

    Why in hell did HD have to go to Porsche for an engine?

    The land of the small-block Chevy has to have the German's design an engine for them????

    0 Not allowed! Not allowed!
    Putting his hands in the air, like he just doesn't care.
    Check out my eBay store!
    Dave - Motorace - Michelin

  8. #8
    Littering and........
    Join Date
    Jul 2004
    Location
    Vermont
    Posts
    7,188

    Hard acceleration

    Originally posted by Karaya One
    Exactly!

    Why in hell did HD have to go to Porsche for an engine?

    The land of the small-block Chevy has to have the German's design an engine for them????
    Did Porsche design that motor? I thought they designed the bike's styling and handling, but I didn't know that they had anything to do with the motor. If they really did, I'd consider a V-Rod for a second bike, Porsche builds a pretty good, though often over-engineered, motor.

    0 Not allowed! Not allowed!

  9. #9
    Just Registered TLRMan's Avatar
    Join Date
    Jun 2001
    Location
    Northshore/Beverly, MA
    Age
    65
    Posts
    2,005

    Hard acceleration

    Originally posted by highsider
    Did Porsche design that motor? I thought they designed the bike's styling and handling, but I didn't know that they had anything to do with the motor. If they really did, I'd consider a V-Rod for a second bike, Porsche builds a pretty good, though often over-engineered, motor.
    They were involved with the V-Rod, as well as the EVO's
    it's hard to make horsepower, and keep emissions in check with big bore twins....Especially the EVO's...now 88's and twin cams.
    But like anything else it's the look, the sound, and the overpricing of the damn things that catch a certain crowd I guess...

    0 Not allowed! Not allowed!

  10. #10
    Junior Member SV1KScott's Avatar
    Join Date
    Apr 2003
    Location
    Beverly MA
    Age
    62
    Posts
    41

    Hard acceleration

    Oh I can't resist
    If you going to throw money at a big V twin the TL1000’s and the SV1000’s Make boat loads of HP and torque with a whopping 61cubic inch displacement and have 6 feet less cam chain to boot.
    You can buy 3 for the price of a "Good Harley".

    0 Not allowed! Not allowed!
    Scott B.
    03 SV1000S

  11. #11
    Lifer
    Join Date
    Oct 2001
    Location
    Bedford, MA
    Posts
    5,237

    Hard acceleration

    The frame on Harley's is freakin pathetic... that's gotta have a lot to do with it...

    They still have a single top tube made of steel... like a BICYCLE! I wouldn't be surprised if some mountain bike top tubes with ovalized/squared profiles & gussetted welds are actually stiffer.

    Pretty crazy as some of the sportbike frames must weigh like 1/4 what a Hog frame weighs and they can deal with an incredible amount of power in comparison.

    It's one of the "issues" the faithful have with the VROD... the perimeter frame on the VRod is much stiffer but the visibility of the frame tubes under the tank is considered ugly.

    Ben

    0 Not allowed! Not allowed!

  12. #12
    Lifer richw's Avatar
    Join Date
    Aug 2004
    Location
    Baltic,CT
    Age
    76
    Posts
    4,482

    Hard acceleration

    I like the frame twisting idea

    I also think HaDa's have a more than 1/2 turn throttle so you really have to move your entire arm through an arc to full throttle and release the massive 50 HP

    0 Not allowed! Not allowed!
    Glen Beck is John the Baptist

  13. #13
    Lifer legalspeed's Avatar
    Join Date
    Jun 2002
    Location
    Somersworth, NH
    Age
    61
    Posts
    4,594

    Hard acceleration

    Originally posted by highsider
    Did Porsche design that motor? I thought they designed the bike's styling and handling, but I didn't know that they had anything to do with the motor. If they really did, I'd consider a V-Rod for a second bike, Porsche builds a pretty good, though often over-engineered, motor.
    Listen to one and tell me it doesn't sound like a 911!!

    0 Not allowed! Not allowed!
    LRRS\CCS\WERA #486

Similar Threads

  1. Rpm's = acceleration false neutral ???
    By sluggah in forum Bike Maintenance
    Replies: 15
    Last Post: 08-11-10, 06:43 PM
  2. SV650S 02 poor acceleration
    By BURZA in forum Bike Maintenance
    Replies: 40
    Last Post: 03-02-10, 10:54 PM
  3. loud pop noise under hard acceleration
    By dj 96yzf750 in forum Bike Maintenance
    Replies: 9
    Last Post: 10-29-09, 07:11 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •