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Pinned So what have you done to your bike today?

Discussion in 'The Pub' started by kiffsta, Nov 3, 2013.

  1. ShaneP

    ShaneP Well-Known Member

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    Just checked with mylaps; first session best time was 2:04 (very slow), then got it down to 1:57, before a hot lap in the third session of 1:50.5 - my best time of the day, which is surprising, I thought I was getting faster, must have just cooked a corner in every other lap of of the day. I found a few ripple strips
     
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  2. Frankster

    Frankster Grey Pride...Adventure before Dementia Staff Member Premium Member Ride and Events Crew

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    Good work Shane. Any pics?
     
  3. ShaneP

    ShaneP Well-Known Member

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    None that I took, I couldn't multitask, but there were photographers there. I did find myself posing for photos when I saw them - it probably looked like a drunk guy pretending to be sober..

    There might be pics on the motorcycle sportsmen's site/FB.
     
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  4. sharky

    sharky Well-Known Member

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    Try the thrust bearing in the clutch plate, they should be press fitted, most just fall out though. With the clutch pulled in, the push rod pushes against the thrust bearing which removes the rattle.
    20191008_114646.jpg
    20191008_115849.jpg
     
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  5. Frankster

    Frankster Grey Pride...Adventure before Dementia Staff Member Premium Member Ride and Events Crew

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    @sharky When you say "with the clutch pulled in", are you saying the clutch level is pulled in? If you are, then that's when the rattle is present. When you put the bike in gear and release the clutch, the rattle disappears as soon as the clutch grabs. Sorry, just wanted to clarify the issue.
     
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  6. ShaneP

    ShaneP Well-Known Member

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    It's starting to sound like ZXR just have noisy gearboxs
     
  7. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Multi-plate clutches are horribly noisy things. Listen to the dry clutch on a Ducati. Sounds like ten skeletons in a tin bucket. Many bikes have sound dampeners on the inside of the clutch cover for that reason.
     
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  8. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

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    On the topic of the noisy clutch - I've got an FZR engine in peices ATM and just looking at the clearances through the drive train I'd say it's just movement between the various gears, from the primary drive gear onwards

    Consider that the FZR is a little different to the ZXR with the springs in the clutch basket, however - there is some lash on the primary gear reduction, then through the clutch basket and into the transmission. One the FZR there is considerable movement of the various gears on the shaft splines - mine aren't worn, it's by design.

    So thinking on that - with the clutch engaged, but no gear selected in neutral, several of the gear pairs are engaged but not locked in with the gears that are solid on the shaft - these all have movement on their respective shafts and will rattle backwards and forwards.
    When the engine is idling, it isn't turning perfectly, it's pulsing.

    I should also add that there is clearance on the primary drive gear and the basket on it's bearing, not heaps, but it will also rattle a little when the transmission isn't in gear and it's loaded.

    Now when you disengage the clutch, (pull the lever) it partially disengages the primary driven gear clutch basket from the first gearbox shaft, but clutch drag will still keep it moving somewhat - this will reduce the noise from the gears a little as they shouldn't be spinning as much (theory), but now you have the clutch plates free, more noise.
    You put it in gear; Now there is clutch drag spinning the transmission slightly, that's why the transmission clunks and the sprocket & chain jump a little.

    Now with the slight drag through the entire drive system out to the back wheel, all of the lash through the gear train is taken up, from the primary drive gear on through the transmission, additionally the clutch plates are all dragging consistently with the pulses of the engine somewhat damped by the springs/rubbers behind the basket. I believe sloppiness wear in these springs/rubber damper contributes to more noise, but a perfect damping here lessens the noise, it doesn't eliminate it entirely.

    Beginning to engage the clutch, all of the pulses from the engine are damped right through the drive train with the lash taken up and the noise diminishes(disappears).

    This is all just theory, but it wasn't until I saw the amount of movement (by design) through the gears in the transmission that the cause for the noise became evident.
    The engine cases are relatively thin, so it's audible, in comparison to the transmission on say a car AND all of the gears are straight cut in the bikes, from the primary drive on through - if you watch any V8 supercars you can hear the whine from the straight cut primary on their transmissions for comparison.

    With all of that said, I do have the clutch basket on an FZR apart to replace the damping rubbers to see if that does lessen the noise when everything goes back together, but having seen the clearances throughout the transmission I won't be thinking that I've done something wrong if it still sounds like a bag of spanners rattling because now I know what I'm hearing.
     
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  9. Frankster

    Frankster Grey Pride...Adventure before Dementia Staff Member Premium Member Ride and Events Crew

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    Good logic Ruckus. The rattle (in neutral) does not change if you give the engine a rev, but I haven't changed the idle speed to see if that has an affect.

    @ShaneP I've only ever had one ZXR engine rattle, so not sure it's a common issue, but if multiple forum members have had it, then it's something to get to the bottom of. The engine I used in the salt bike was silky smooth with standard idle rpm. Putting it in gear didn't produce any clunks or jolts. I was running 30W racing oil in that engine, so less "spin" affect, but still no noises from gearbox in any static/drive situation.
     
  10. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Rego inspection day for all blue Triumphs


    rego day.png
     
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  11. jmw76

    jmw76 Well-Known Member

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    My Bike:
    Honda cbr250rr mc22 road + 1 track, Honda RC 162 tribute bike, Honda Spada Vt250, Honda CBR900RR
    Looking for some better shocks for my RC project.
    Kinda like the look/features of these but want to find out if anyone has had any experience with similar.
    Would like at least rebound and preload adjustment. Do not want a seperate oil reservoir.
    They need to be 330mm between eyes.
    I struggle to get sensible answers back from suppliers on spring rates, etc.
    My current shocks are just springs around a shaft. They are horribly underdamped.
    Would be nice if I could find something with a slightly better lead time also.

    https://www.ebay.com.au/itm/330mm-P...079680?hash=item215121a300:g:R0IAAOSwsrlcQa12
     
  12. Oigy

    Oigy Owner of many bikes, keeper of few :(

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    A couple of years ago, I got some shocks of Ikon, a local mob from Albury I believe, rang them up, easy to talk to good service asked what sort of loads I was carrying, how I rode ect, got the shocks in a week, reasonable price and they worked brilliantly. Couple of weeks later, got a coupon for 60% of matching progressively wound fork springs which I took up. TOTALLY transformed the ride and handling of my bike. I know they do a large range and will also do special orders if required. Had me sold :)
     
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  13. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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    :thumb_ups: for Ikon. Have them on three bikes.
     
  14. jmw76

    jmw76 Well-Known Member

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    Do Ikon do fully adjustable rebound and preferably bump also? From what I see they look to be fixed settings and limited spring seat adjustment. This is a track bike, although with a classic look.
     
  15. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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    Dunno, give them a ring.
    (02) 6040 9955
    What about English Hagon, Progressive or YSS shocks?
     
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    Last edited: Oct 12, 2019
  16. Frankster

    Frankster Grey Pride...Adventure before Dementia Staff Member Premium Member Ride and Events Crew

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  17. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

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    Took the FZR for a ride down to the paint shop this afternoon.
    Coming up to some traffic at the red light at Jetty Rd Glenelg i filtered my way up to the front of the car's
    I stopped at the front with a 4WD to my right and a guy in his 80's in a 1992? Jaguar Sovereign to my left, he gave me the death stare as i went past his driver's window.
    Anyway sitting there waiting for the light's to change and i could hear him increasing the rev's ready to go, light's went green and i took off, i could hear the engine revving in the Jaguar behind me to my left as i shifted into second gear and and then cruised at 60km/h.
    The Jag went flying past doing close to 80km/h (in a 60 zone) he then had to slow down and stop at the next set of light's,
    i waved goodbye to him as i filtered past and up through the traffic to the front again
    I think i saw steam coming out his ear's !!

    I hope the Jag owner felt good speeding past all those people and little kid's coming out from Glenelg
    I reckon the government need's to keep advertising the fact that Lane Filtering is legal in SA because there's still so many people that get angry about it.
    On the way home i had a Subaru WRX in front of me and as we slowed down for a red light she veered over to the right when she saw me starting to filter through the middle of the car's, there was still enough room for me to get through though so i did.
     
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  18. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Sydney drivers are pretty good in that regard... everyone lane filters, some even move over or fold in their mirrors.

    Tailgaters are still too common, though.

    Today Ms. Linkin and I went for a ride to the Thai temple in Annandale... I have to replace the seat on the bandit now as it has split on some of the stitching, and the thing absorbs water in the rain and takes days to dry out... even the wet weather pants aren't helping any more... think I'll go for a standard seat.

    After the temple, we went to the markets in Glebe and did some shopping before the rain hit, we retreated into K-mart to buy a few more bits and pieces... managed, just, to fit everything in the ventura bag and tank bag.

    My new rear shock should arrive monday... think I'm going to have to set it for 2-up riding permanently :) Then will have to do something on the front forks for that as well.
     
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  19. Frankster

    Frankster Grey Pride...Adventure before Dementia Staff Member Premium Member Ride and Events Crew

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    @my67xr Same problem in VIC. They either don't know the rules or just have a bug up their rectum about motorbikes getting ahead of them. It's like we're some kind of second class citizen. Not sure what bike rego is SA, but in VIC it's basically the same as car rego, so to all those annoyed drivers I say go fornicate yourselves you arrogant vaginas!
     
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    Last edited: Oct 12, 2019
  20. kiffsta

    kiffsta Senior Member

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    You should stopped and adjusted his passenger side mirror, jag owners would have loved that
     
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