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Thread: How well sprung is your stock suspension?

  1. #1
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    How well sprung is your stock suspension?

    Found this one 600rr.net forums. Apparently this guy is well respected in the US (like our own Robert Taylor).

    Kinda silly measuring sag with the feet just touching the ground but clearly this is just a quick guide.

    2007 Models

    2008 Models

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    Quote Originally Posted by discotex View Post
    Kinda silly measuring sag with the feet just touching the ground but clearly this is just a quick guide.
    Please elaborate...

    I'd have thought feet just touching the ground, means 99.9% of your weight on the bike, similar to when you ride...

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    Quote Originally Posted by AlBundy View Post
    Please elaborate...

    I'd have thought feet just touching the ground, means 99.9% of your weight on the bike, similar to when you ride...
    It's not so much about total weight but about the position of the weight. With your feet down you don't lean as much on the clipons.

    Probably not an issue on a motard tho.

    Also needs to be done with all your riding gear on to be truly accurate.

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    After a quick test on my other bike, I'd have to disagree with you. By sitting comfortably and having one foot on the peg, using the other for balance, I didn't notice much difference and certainly didn't notice suspension movement.

    Theoretically, there shouldn't be much weight on your wrists anyway. Your body core should be taking most of the weight.

    Also, the weight bias could shift somewhat, depending on how much you bend your arms and whether you are humping the tank or sitting further back, which changes quite a bit while riding...
    The static test is to get the sag into the general range, after which one can fine tune...
    And yes, best done with all-up-weight... And all the damping set to minimum...

    Lol, as for the 'tard, I haven't even bothered with trying to change anything with it...

    Going back to the original post, it at least gives one an idea of how the bikes come stock... (Assuming it's set on factory settings)

  5. #5
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    Quote Originally Posted by AlBundy View Post
    After a quick test on my other bike, I'd have to disagree with you. By sitting comfortably and having one foot on the peg, using the other for balance, I didn't notice much difference and certainly didn't notice suspension movement.
    For all I know you could be right... Goes against everything I've ever read on suspension tuning though.

    Will try it both ways when I setup the sag on my 600rr and see what happens.

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    Quote Originally Posted by discotex View Post
    For all I know you could be right... Goes against everything I've ever read on suspension tuning though.

    Will try it both ways when I setup the sag on my 600rr and see what happens.
    Lol, all I'm saying, is we are dealing with a few mm for the difference in weight shift. A few mm is not a big deal when you are talking 10's of mm due to differences in weight.

    Looking at the 08 Blade vid for example, the rear sag goes from 23mm to 43mm (or thereabouts), between the riders. If the lass shifted a little forwards or rearwards, it'd be a few mm.

    It depends on what one uses as a guage anyway. Some people say 20-30mm for track/sport. 30-40mm for sport/road... There's an amount of leeway incorporated already...

    I'm right there on NOT being an expert, just I don't see how that small amount of weight bias will make a difference for 90% of us, setting our bikes up.

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    That's all very well for people with enough coin to always have a bike that's less than 3 years old but what about us poor tight fisted gits that will always own a bike that's at least eight years old? (I'm currently waiting for a 749 to reach my level of affordability.....)

    Closest I could get to my bike was the 800ss - that geezer is a northern pom wiv a bit of yankee accent thrown in. He seems to reckon the bike is good for anyone under 100kg but a bit soft on the front for pie mongers.

    suits me.
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    To be honest, I think most of us buy a bike and ride it like we get it... It's only when the suspension is REALLY bad, that a lot of people go looking for answers.

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    It was shite. So I replaced it.
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  10. #10
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    Quote Originally Posted by AlBundy View Post
    To be honest, I think most of us buy a bike and ride it like we get it... It's only when the suspension is REALLY bad, that a lot of people go looking for answers.
    Yeah - it kind of vindicted my decision to keep the bike when I gave Gremlin a shot of the bike. After conceeding it is underpowered he did say "I can see why you enjoy riding it though - it really does handle like it's on rails."
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    Quote Originally Posted by McJim View Post
    Yeah - it kind of vindicted my decision to keep the bike when I gave Gremlin a shot of the bike. After conceeding it is underpowered he did say "I can see why you enjoy riding it though - it really does handle like it's on rails."
    And that, after jumping off the KTM with sorted suspension... Must be a peach then...

  12. #12
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    Most bikes with stock suspension don't have ideal spring rates.
    e.g K6 GSX-R750.. stock fork spring rate: 1.00kg/mm, even for gravitationally challenged riders like myself, too heavy! Replaced by .95s. Gassit Girl's 750 has .90s fitted now
    Rear spring: 9.50nm... okay for me, GG's bike now has 8.5 fitted.
    You would be surprised just how much better your bike will feel with correct spring weight and rider sag
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    Quote Originally Posted by PrincessBandit View Post
    I find it ironic that the incredibly rude personal comments about Les were made by someone bearing an astonishing resemblance to a Monica Lewinsky dress accessory.

    Quote Originally Posted by PrincessBandit View Post
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    Quote Originally Posted by AlBundy View Post
    To be honest, I think most of us buy a bike and ride it like we get it... It's only when the suspension is REALLY bad, that a lot of people go looking for answers.
    After 3 trackdays I'm starting to appreciate how much difference suspension can really make so every bit counts to me. But yeah ballparking it is going to be a good start for most riders. I rode for 6 months on stock settings before I started tinkering.

    Was interesting to watch the Ninja 250r vid. Basically if you're 100kg+ you'll be almost bottoming out the suspension which is mega dodgy.

    Also the 08 cbr600rr must be broken as it has the same suspension as the 07 yet they get totally different results.

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    I'm not convinced all bikes are set up equally.

    There were reports on one forum, two brand new bikes, standing alongside each other in a shop. The one tail was about 15mm lower than the other. Explain that.

    Who does the actual suspension setting to 'standard'? The factory, or the bike shop? Either way, they are not all assembled/adjusted the same...

    One would hope that in the above videos, they would have adjusted everything to stock, from the owners manual settings and not relying on it from the factory...

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    Quote Originally Posted by AlBundy View Post
    Please elaborate...

    I'd have thought feet just touching the ground, means 99.9% of your weight on the bike, similar to when you ride...
    Whenever I set up the sag on a bike, I have the rider in the seated riding position on the bike.
    I have found the Racetech site helpful with recommended spring rates, and Robert Taylor has a useful set up guide available too.
    You would be surprised how woefully set up/sprung some bikes are in their stock "as delivered" form.
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    Quote Originally Posted by PrincessBandit View Post
    I find it ironic that the incredibly rude personal comments about Les were made by someone bearing an astonishing resemblance to a Monica Lewinsky dress accessory.

    Quote Originally Posted by PrincessBandit View Post
    All was good until I realised that having 105kg of man sliding into my rear was a tad uncomfortable after a while

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