Author Engaging 1st gear - big bang  (Read 1019 times)

0 Members and 1 Guest are viewing this topic.

  • Offline Mossy19   ie

    • CBF Member  ‐    24
    • **
    • Topic Author

    Offline Mossy19

    • CBF Member
    • **
    • Topic Author
    • Posts: 24
    • Bike: No CBF yet
    • Country: ie
    Engaging 1st gear - big bang
    on: 22 December, 2023, 03:03:10 pm
    22 December, 2023, 03:03:10 pm
    I went to see 2009 bike.
    Starts immediately and sounds good.
    Engaging 1st gear is very noisy, a lot noisier than Blackbird, a real bang.
    It hadn't been used for about 6 weeks.
    He said he used semi synth oil.

    I did see a video and it also made quite a noise engaging gear.

    Comments anybody please.

    Hope to go on it tomorrow.


  • Offline raYzerman   ca

    • CBF Pro  ‐    134
    • ***
      #1

    Offline raYzerman

    • CBF Pro
    • ***
    • Posts: 134
    • Bike: CBF1000A9 VFR800
    • City / Town: Millgrove, ON
    • Country: ca
    Re: Engaging 1st gear - big bang
    Reply #1 on: 23 December, 2023, 02:13:32 am
    23 December, 2023, 02:13:32 am
    Clutch not disengaging or disengaging fully.  Needs clutch system flushed and bled.  Look in the reservoir for very dark fluid.  Take the cover off and see how grungy it is in there, common to neglect.

  • Offline marky99925   ie

    • CBF Pro  ‐    171
    • ***
      #2

    Offline marky99925

    • CBF Pro
    • ***
    • Posts: 171
    • Bike: cbf1000
    • City / Town: limerick
    • Country: ie
    Re: Engaging 1st gear - big bang
    Reply #2 on: 23 December, 2023, 03:09:09 pm
    23 December, 2023, 03:09:09 pm
    Hi
    My MK1 makes a pretty unholy clunk into first, i've had it 9 years so i suppose used to it now, i find chain tension makes a difference and as per previous post changing the clutch fluid, i'm very average with spanners and I found it straightforward enough, if you don't have it already there are links all over the forum to the service manual which i've found very handy.
    Let us know how it goes.

  • Offline pedro   england

    • CBF Master  ‐    715
    • ****
      #3

    Offline pedro

    • CBF Master
    • ****
    • Posts: 715
    • Bike: CBF 1000 2008
    • City / Town: Cumbria
    • Country: england
    Re: Engaging 1st gear - big bang
    Reply #3 on: 24 December, 2023, 12:43:09 am
    24 December, 2023, 12:43:09 am
    I've got a Mk1. There is a clunk when engaging first, most noticeable from cold. But it's a clunk rather than a *bang*.

  • Offline Mossy19   ie

    • CBF Member  ‐    24
    • **
    • Topic Author
    • #4

    Offline Mossy19

    • CBF Member
    • **
    • Topic Author
    • Posts: 24
    • Bike: No CBF yet
    • Country: ie
    Re: Engaging 1st gear - big bang
    Reply #4 on: 24 December, 2023, 12:59:32 am
    24 December, 2023, 12:59:32 am
     :028:

  • Offline raYzerman   ca

    • CBF Pro  ‐    134
    • ***
      #5

    Offline raYzerman

    • CBF Pro
    • ***
    • Posts: 134
    • Bike: CBF1000A9 VFR800
    • City / Town: Millgrove, ON
    • Country: ca
    Re: Engaging 1st gear - big bang
    Reply #5 on: 24 December, 2023, 02:43:21 am
    24 December, 2023, 02:43:21 am
    Some bikes better than others on the kerchunk into first gear..... engine is spinning, clutch dragging a bit, transmission still spinning... mostly the solutions are 1) ensuring the clutch system is working properly, so when you pull the lever, the clutch disengages (as best it can), 2) oil may be cold, causes sticking plates, will be better when hot, 3) lever may not be adjusted so clutch is fully disengaged when pulled to the bar, 4) not pulling it to the bar, 5) try holding the clutch disengaged for a count of 3 full seconds then shift into first. 

    Another helpful thing if you're still having persistent problems, can be to clean the clutch plates and coat them with engine oil so they are all coated uniformly (some clutch systems do not adequately oil all the plates.  While you're in there, usually with higher mileage bikes, there can be some notching of the clutch basket where the friction plates have been wearing into it.  If minor, just file it smooth.  If major, someday you'll need a new clutch basket... but that's not all that likely.

    Hope that helps understand it at least.

  • Offline Steelworker   gb

    • CBF Pro  ‐    127
    • ***
      #6

    Offline Steelworker

    • CBF Pro
    • ***
    • Posts: 127
    • Bike: 2009 1000ABS
    • City / Town: London
    • Country: gb
    Re: Engaging 1st gear - big bang
    Reply #6 on: 24 December, 2023, 08:21:15 am
    24 December, 2023, 08:21:15 am
    I've had my 2009 CBF from new and it's always engaged first gear near silent when first starting the bike up. When the engine warms up after riding there is a "clunk" when selecting first gear.
    It's been doing this for the last 14 years and 40,000 miles later.

  • Offline Art   england

    • CBF Legend  ‐    2242
    • *****
      #7

    Offline Art

    • CBF Legend
    • *****
    • Posts: 2242
    • Bike: SC58 CBF1000 A-6
    • City / Town: Shoreditch
    • Country: england
    Re: Engaging 1st gear - big bang
    Reply #7 on: 24 December, 2023, 09:36:15 am
    24 December, 2023, 09:36:15 am
    The clunk is the gearbox dog gears engaging, often accompanied by a rattling of the drive chain. Try this next time you stop - Select neutral gear, clutch out, roll motorcycle a couple of feet backwards, apply front brake and select first gear for minimal clunk.

  • Offline Mossy19   ie

    • CBF Member  ‐    24
    • **
    • Topic Author
    • #8

    Offline Mossy19

    • CBF Member
    • **
    • Topic Author
    • Posts: 24
    • Bike: No CBF yet
    • Country: ie
    Re: Engaging 1st gear - big bang
    Reply #8 on: 24 December, 2023, 09:59:54 am
    24 December, 2023, 09:59:54 am
    Thanks guys for all that.
    When I took it out for test he had changed the oil and after run it didn't seem so bad.
    I watched a video and I could hear the same clunk.

     



    diverse-leafy