Gixxer frames are made of tissue paper

[henry]

http://www.triumph675.net/forum/showthread.php?p=278440

[Pwalo]

Still not recommended for wiping your nose on though. Perhaps there's a little bit more to come out about that story.

[Cajun]

everything relative, sometimes its people luck,

10 people crash same place same speed same way same type of bike, 9 people will be able to get up and keep going the 10th could damage there frame.

[boomer]

yeah im the one in ten.. my rear sub frames been replaced twice now because the things cracked all the way through :)

[Luckylegs]

yeah im the one in ten.. my rear sub frames been replaced twice now because the things cracked all the way through :)

Actually with you the saying "Theres always one" might be more apt... :shutup:

[munterk6]

The idea is to NOT crash, to NOT drop it.....EVER!!!!!
Frames are replaceable, people are not. End of story. :2guns:

[skidMark]

yeah im the one in ten.. my rear sub frames been replaced twice now because the things cracked all the way through :)


Well, u do eat an awful lot of pies boomer.

But in saying this ur still a skinny coont, gixxer frames are junk.

[Banesto John]

Wow.

Years ago there was an American company that started selling aluminium bicycle frames before anyone else. The side walls of the top tube were awesomely strong lengthwise, but pathetically weak sideways.

That's because the stress on a bicycle frame is lengthwise, so it made sense to design the side walls that way. Sadly the people who owned the bikes found that even a light bang on at 90 degrees to the tube direction meant a nasty dent.

It looks like the Gixxer has a similar problem. The frame is designed to be awesome in the front/back and up/down plane, but it isn't meant to be smacked sideways.

Maybe we are all responsible for this, causing the designers to try to improve the power to weight ratio with every new model. There are only 2 ways to do that, up the power or down the weight.

Bikes are becoming nigh on flimsy, but able to do warp speed. Just don't do things to them that they weren't designed for (like smacking the frame with the bar end :shit: ) and things will be cool.

Just my thoughts.

Maybe I think too much.

[skidMark]

Maybe I think too much.

Yeah, for the pricetag i think they should be making them so they can be dropped.

older bikes you can give a preetty hard crash and it doesnt fuss them

New ones especially GSXR fall apart, im not saying make them indetructable
ut a 50kph slide shouldnt screw a frame, didnt on old bikes.

But yeah as you say, it is the power to weight issue.

I spose it works out to... you crash...it breaks, then you buy another one...

kaching for suzuki.

but theres a limit, and condsidering boomers subframe has broken twice just sitting on it (he didn't crash it!) is just ridiculous. (and hes not exactly fat, 80kg or so.)

[kiwifruit]

they're made to be light and stiff

they're not made to sustain impacts (binning, landing wheelies, stoppies etc)

[marty]

it's called monocoque construction. keeps weight down with good strength in the intended directions.

aeroplanes are built the same -super lightweight materials put together in such a way that the sum of the parts are super strong. easy to punch a hole in the side of a plane though.

[White trash]

yeah im the one in ten.. my rear sub frames been replaced twice now because the things cracked all the way through :)
Bro, should clarify it's your rear most subframe subframe if you like. Only holds the plastic bit on the back. HTFU :D

[flyingbrick]

ummn, Monocoque construction essentually means stressed skin. EG, airplanes, jap cars etc etc.


n.

A metal structure, such as an aircraft, in which the skin absorbs all or most of the stresses to which the body is subjected.

[French : mono-, mono- + coque, shell (from Old French, from Latin coccum, berry, from Greek kokkos).]

I fail at seeing how the subframe of any bike could be stressed skin?

-------------------

why are people not designing/building/selling/modifying their subframes to remove the failure points? I have no idea where these frames are cracking/breaking but it surely cant be too hard (and will be relatively cheap) to get a few additional gussets welded in.

[skidMark]

they're made to be light and stiff

they're not made to sustain impacts (binning, landing wheelies, stoppies etc)


You my or may not be taking the piss
but its true

I mean hell 170hp at the wheel (being generous) is going to stand up pretty bloodey easy.

And the brakes they have will stoppie them.

Its not like suzuki dont know people stunt gsxr's if they didnt want to do wheelies etc they dont have much need for a 1000cc most of the time.

unless on the track...

They should be made stronger.

[marty]

from suzuki:

Aluminum alloy twin-spar frame is built using five castings for lightweight, unmatched handling and performance, increased production precision, and reduced weight.

from kawasaki:

- Well-balanced aluminum monocoque frame provides superb stability and reflexive handling

could argue semantics i guess.

[DEATH_INC.]

Casting makes 'em light and rigid, but unfortunately that means no flex, the thing that saves 'em when you crash.....take ya pick, handling OR durability...

[kiwifruit]

You my or may not be taking the piss

Nope



I mean hell 170hp at the wheel (being generous) is going to stand up pretty bloodey easy.

yes, they will loft the front under power
look at the sorts of wheelies these bikes are doing when racing, these are not the sorts of "wheelies" that puts stresses on the frame it wasn't designed to handle.

they are not made to land hard



And the brakes they have will stoppie them.

Sure.
They are not made to land a stoppie hard though.



if they didnt want to do wheelies etc they dont have much need for a 1000cc most of the time.
.
what a load of bollocks



They should be made stronger.
If they are used as intended there isn't a problem.

[Matt Bleck]

You my or may not be taking the piss
but its true

I mean hell 170hp at the wheel (being generous) is going to stand up pretty bloodey easy.

And the brakes they have will stoppie them.

Its not like suzuki dont know people stunt gsxr's if they didnt want to do wheelies etc they dont have much need for a 1000cc most of the time.

unless on the track...

They should be made stronger.

They are a RACE replica, homogalted so suzuki can race them in the WSBK. They are made to be as light as possible, not to be binned, wheelied or stoppied.

[White trash]

If they are used as intended there isn't a problem.

That's what I've been saying for the past 12 months. I've crashed mine more often than I've ridden it. Straight as an arrow, no cracks.

Thanks for your informed input once again though Mark, whatever it was. Very insightfull I'm sure.

[SPman]

ummn, Monocoque construction essentually means stressed skin. EG, airplanes, jap cars etc etc.


ZX12R...........

[Shadows]

Bloody Jap crap :lol:

[skidMark]

Nope


yes, they will loft the front under power
look at the sorts of wheelies these bikes are doing when racing, these are not the sorts of "wheelies" that puts stresses on the frame it wasn't designed to handle.

they are not made to land hard


Sure.
They are not made to land a stoppie hard though.


what a load of bollocks


If they are used as intended there isn't a problem.


but the people who buy these things dont do perfect wheelies stoppies etc, this is who they are sold to.

In an ideal world etc etc. :nono:

[kiwifruit]

but the people who buy these things dont do perfect wheelies stoppies etc, this is who they are sold to.

In an ideal world etc etc. :nono:

ahh, of course.... what was i thinking
sorry mate, you are quite right.

[Gremlin]

but unfortunately that means no flex, the thing that saves 'em when you crash.....
flex also happens during normal riding (well, maybe not normal riding). Ultimately, the long and short is that the frame will go brittle over time, how much time depends how it is treated (and obviously what the frame is made of). No bike is perfect, but the big manufacturers think we all want lighter faster bikes, which some do, but not all. Suzuki isn't alone with frame issues either, just more morons crash them at the moment :rolleyes:

Personally, I'm done with sportbikes... they look uglier every year and make me lose my license! :crybaby:

[White trash]

Suzuki isn't alone with frame issues either, just more morons crash them at the moment :rolleyes:

That's because more morons are buying them :D Despite their "tissue paper" frames, GSXRs are more popular than ever before.

Hmmmmmm, must be a conspiracy.......

[Big Dave]

GSXRs are more popular than ever before.
.


They are selling so well because each owner usually writes a few off.

[merv]

At least that one never sheared off near that nasty weld they have right in the wrong place for high stresses.

[Gremlin]

That's because more morons are buying them :D Despite their "tissue paper" frames, GSXRs are more popular than ever before.
First part is exactly correct... whichever bike is the crasher's chosen one (gsxr's have been it lately) will feature more...

second part, too hard to tell... its been said before, and Dave has said it again (and he was probably the one saying it before). Plus, if the bike can be written off more easily (and damage to the frame is good like that) and the moron buys another... well... easy increase in sales, as most don't write just one off :lol: