Is it the gixxer or me?

[KS34]

I have a GSX-R 750K6, when going through reasonably fast corners (I have only noticed this on right handers) the bike turns in the front-end(clip-ons/wheel) toward the apex. I first noticed at a trackday at Taupo and I was on a warn set of original tyres and I thought this maybe the problem, but I have just put a fresh set of pilot power 2ct's on and no difference. All suspension settings etc are untouched. Any info would be greatfully taken on board.

[Deano]

I have a GSX-R 750K6, when going through reasonably fast corners (I have only noticed this on right handers) the bike turns in the front-end(clip-ons/wheel) toward the apex. I first noticed at a trackday at Taupo and I was on a warn set of original tyres and I thought this maybe the problem, but I have just put a fresh set of pilot power 2ct's on and no difference. All suspension settings etc are untouched. Any info would be greatfully taken on board.

Has it been dropped ? Twisted or bent forks ?

Are the front and rear ends aligned ?

Is it only this bike or others you have noticed it on ?

[jimbo600]

I'm guessing its probably you mate as the K6 750 handles very sweetly indeed. However you might want to check the obvious like is the rear wheel straight, (measure it and don't rely on the markers on the swing arm) and check alignment. If you want to swap bikes for 10mins or so (I have a K6 600) to see if you feel the same on mine then we can hook up in the hutt at some stage.

[KS34]

Cheers guys will check all that, I have not noticed it on other bikes at speed, my friend has a 05 rsvr factory and I noticed a similar feeling at very low speed but not higher speeds. The bike has not been dropped or bent in any way,and I might just take you up on that jimbo600, will report back soon..

[cowpoos]

I'm guessing its probably you mate as the K6 750 handles very sweetly indeed. However you might want to check the obvious like is the rear wheel straight, (measure it and don't rely on the markers on the swing arm) and check alignment. If you want to swap bikes for 10mins or so (I have a K6 600) to see if you feel the same on mine then we can hook up in the hutt at some stage.
yep alingnment...I think Jimbo's on to it...measure from swing arm pivot to rear wheel axle...and see what difference is.

I measured a K7 thou recently and it was 2mm out if going by the indent guides on the swing arm.

and take jimbo up on his offer..top bloke!!

[skelstar]

You're lucky you found two of the warmest friendliest guys on KB in the Wgtn region, not wankers like the rest of them. They love singing 'Kumbaya' while lubing their chains and rarely make enemies at the racetrack.

[Deano]

They love singing 'Kumbaya' while lubing their chains and rarely make enemies at the racetrack.

Wasn't it a Killers song, something about February ?

[Robert Taylor]

I have a GSX-R 750K6, when going through reasonably fast corners (I have only noticed this on right handers) the bike turns in the front-end(clip-ons/wheel) toward the apex. I first noticed at a trackday at Taupo and I was on a warn set of original tyres and I thought this maybe the problem, but I have just put a fresh set of pilot power 2ct's on and no difference. All suspension settings etc are untouched. Any info would be greatfully taken on board.

There is also an issue with the high speed rebound valving on these forks and we have developed a mod that gives a huge improvement and allows the bike to hold a line more readily.

[Kendog]

I have never noticed this on mine, but I may not be cornering at the speed required to show this.

[Pussy]

There is also an issue with the high speed rebound valving on these forks and we have developed a mod that gives a huge improvement and allows the bike to hold a line more readily.

I can vouch for the rebound modification.....night and day difference.
Might also be worth checking alignment. I know of a K7 GSX-R750 that is having a few handling issues (not the two in my shed)...feels weird. Guys like Steve Bridge or Smythe and Yates can measure a bike up in very short time and identify mis-alignment

[driftn]

I'm guessing its probably you mate as the K6 750 handles very sweetly indeed. However you might want to check the obvious like is the rear wheel straight, (measure it and don't rely on the markers on the swing arm) and check alignment. If you want to swap bikes for 10mins or so (I have a K6 600) to see if you feel the same on mine then we can hook up in the hutt at some stage.

Hey Jimbo my 750 is feeling a bit funny too maybe we could swap bikes.
For a week or so.

[jimbo600]

Hey Jimbo my 750 is feeling a bit funny too maybe we could swap bikes.
For a week or so.

No need to mate. It's definitely the bike. Have you tried a different hair do?

[KS34]

everything on the bike seems pretty much aligned (as far as I can check), one thing I did notice while checking the bike was a dark band, like a rub about 10mm wide around pretty much the entire circumference of the front tyre sidewall (rightside if you are on the bike), can't see anything that would rub only thing I can think of is when they fitted the tyre, I'll put some chalk on it before I go out next time and see what happens.

[cowpoos]

everything on the bike seems pretty much aligned (as far as I can check), one thing I did notice while checking the bike was a dark band, like a rub about 10mm wide around pretty much the entire circumference of the front tyre sidewall (rightside if you are on the bike), can't see anything that would rub only thing I can think of is when they fitted the tyre, I'll put some chalk on it before I go out next time and see what happens.
maybe you should PM a guy on here called TDC he's in welli...and is known to be a bit of a dab hand with suspension,etc...meh be you wanna get him to have a lookie..it sounds alil more sinister... do you know the bikes history?? like are you the first ever owner of this bike? etc?

[KS34]

Thanks heaps for all your help, pussy for first putting me onto TDC and to TDC you ROCK!! its amazing what cunning, good old fashion knowledge can do. haven't fully tested bike yet but the ride home was like I was on a different bike! I'll do my home work TDC set me and I'll report back....:clap:

[Pussy]

Thanks heaps for all your help, pussy for first putting me onto TDC and to TDC you ROCK!! its amazing what cunning, good old fashion knowledge can do. haven't fully tested bike yet but the ride home was like I was on a different bike! I'll do my home work TDC set me and I'll report back....:clap:

Looking forward to hearing of progress!

[boomer]

Looking forward to hearing of progress!

Who da man...???? !!!!

So what is/was it..Do tell KS34.

[Blue Velvet]

Who da man...???? !!!!

So what is/was it..Do tell KS34.

Yes, please tell...

[KS34]

TDC reset the front wheel, he loosened off the extremely tight front axle nut, then the axle clamp bolts (also way to tight) and bounced/compressed forks abit then tightened axle nut almost all the way, more compressing then tightened axle clamp bolts (christ I hope thats right) then finished off axle bolt. He explained that if this is not done correctly the forks will not be in true alignment and stiction will accure. there is a huge disclaimer with this as He's the pro not me but I think that was the order in which things were done. Then he explained how to check if your rear wheel is true. Get a bit of string (fine stuff, not big course stuff) I tied one end to an axlestand ruffly 1m infront of bike (i had the bike on a rear paddock stand) run the string down the bike and around the back tyre, then down the other side of the bike to a second axlestand (gaffa tape the string to the back (Tread) of the rear tyre so it doesnt slip down, and have the bike in gear) I had it just below the under side of the swing arm.Bring the string nice and taught and move the string to and away from the bike to make sure the string is running straight down the tyre and down the bike. Once all this is set look at the string it should be of equal distances running passed the front tyre ( when i had adjusted the rear wheel the string was 34mm away from each side of the front tyre. Just re read this and it sounds Fn complicated good job I'm not a teacher!! Anyway test rode tonight and for me it was hard to believe but it felt good I was running into corners faster and putting power on earlier, it was my bike of old pushing me to go faster. One other thing I have changed is my riding style, I used to drag my kneesliders hanging off like a loon everywhere but by sticking closer to the bike even when my bum cheek is off it felt a lot better. If you have managed to read this with out taking a nap good on ya and sorry!
Cheers to all again!!!

[Pussy]

Totally agree regarding mounting the front wheel. I always follow torque recommendations from the service manual regarding axle nut/pinch bolt torque settings, and centrallising the axle (72.5 ft/lbs axle nut, 16.5 ft/lbs pinch bolts). Incorrectly installing the wheel can make a huge difference to fork action etc. I've had the forks out of both sem fiddys that live here lately, and can quite happily report that they were reinstalled with no ill effects.Must get around to checking front/rear alignment with the string method

[TDC]

Thanks heaps for all your help, pussy for first putting me onto TDC and to TDC you ROCK!! its amazing what cunning, good old fashion knowledge can do. haven't fully tested bike yet but the ride home was like I was on a different bike! I'll do my home work TDC set me and I'll report back....:clap:

No worries, thats nice etc :rolleyes: But the really important bit is KS34 real skills and talent have improved my morning cup of coffee beyond my wildest expectations.....

Your a coffee god!!!! Thank you!

[TDC]

Get a bit of string (fine stuff, not big course stuff) I tied one end to an axlestand ruffly 1m infront of bike (i had the bike on a rear paddock stand) run the string down the bike and around the back tyre, then down the other side of the bike to a second axlestand (gaffa tape the string to the back (Tread) of the rear tyre so it doesnt slip down, and have the bike in gear) I had it just below the under side of the swing arm.Bring the string nice and taught and move the string to and away from the bike to make sure the string is running straight down the tyre and down the bike. Once all this is set look at the string it should be of equal distances running passed the front tyre ( when i had adjusted the rear wheel the string was 34mm away from each side of the front tyre.

Your description works for me (typing wasn't difficult at all). With the GSXR it is a good idea to file down the edge of one adjuster block so that the marks are even on both sides of the bike, thus correcting the factory marks which are unfortunately not the best on some models......

[skelstar]

So things are much better than they were before, TDC ... :mellow:

[Blue Velvet]

Your description works for me (typing wasn't difficult at all). With the GSXR it is a good idea to file down the edge of one adjuster block so that the marks are even on both sides of the bike, thus correcting the factory marks which are unfortunately not the best on some models......

Looking forward to some help from you next week TDC. Measured up the alignment last night (<a href="http://www.kiwibiker.co.nz/forums/member.php?u=12854" target=blank>thanks, you rock</a>) but would like to try the things you have done with KS34.

[Pussy]

FWIW, I reckon you should possibly get the forks sitting central in the triple clamps and re-install the front wheel first, and that will give you a more accurate basis to start the alignment with, especially if there has been any dislodging in the front

[KS34]

Good point if you don't then you are wasting your time, you wont have the front wheel as a reference point.

[Pussy]

Good point if you don't then you are wasting your time, you wont have the front wheel as a reference point.

Ain't that the truth

[KS34]

I've had a bit of a set back. I went for a ride this afternoon on my test track (Rimutakas) and the bike although far better than before still has a small issue on the fast righthanders, I'm going to check the tripleclamps and bars. I inadvertantly glanced down in the triple clamp area when riding today and my first impression was they are ever so slightly on the piss. WHen on my bike, like in the shower is my best thinking spots, it dawned on me that the first time I felt the problem was at the trackday, which coincidently was the first and only time the bike has been on a ute, I'm now thinking we may have pulled something out of alignment with the tiedowns. Will get to the bottom of this yet. The bike is feeling great though!

[boomer]

I had stiction.

Some loosening off.. bouncing, some tightening and now im faster than ever.

i know my rear ain't straight but thats ok.. i got Gold on the back.

funny thing about these suzukis huh... they're benter than a honduh rider huh?!! how ironic is that !

[KS34]

Good to hear, sounds painful but as you point out far less than the hondu crew go through!:eek5:

[Pussy]

I had a K1 GSX-R1000 a few years ago, with a similar problem. The bike had never been dropped, but had the front wheel bodgily fitted by a certain shop.
To solve the problem, I did the following:
Put the bike on paddock stands, the front an under the lower clamp type one
Remove front wheel
Ensured that both fork legs extended above the top clamp the same amount
Retorqued fork clamp bolts to specific torque
Removed nut from top triple clamp, and loosened fork clamp bolts on top clamp
Ensured top clamp, after lifting it slightly, was an even fit over the fork legs
Retorqued all top bolts/nut on clamp
Refit front wheel, torque up axle, leave pinch bolts finger tight for now
Spin front wheel as fast as you can by hand, applying front brake several times
Now torque up axle pinch bolts.

The forks felt very smooth after this, and the eye-ometer test for steering central was passed. Generally if there is a stiction problem, it is a give away that something isn't straight

My .05c worth, anyway

[cowpoos]

I've had a bit of a set back. I went for a ride this afternoon on my test track (Rimutakas) and the bike although far better than before still has a small issue on the fast righthanders, I'm going to check the tripleclamps and bars. I inadvertantly glanced down in the triple clamp area when riding today and my first impression was they are ever so slightly on the piss. WHen on my bike, like in the shower is my best thinking spots, it dawned on me that the first time I felt the problem was at the trackday, which coincidently was the first and only time the bike has been on a ute, I'm now thinking we may have pulled something out of alignment with the tiedowns. Will get to the bottom of this yet. The bike is feeling great though!
gt hold of jimbo600 and let him ride your bike...I think you need a second opinion...and not worry...jimbo is a friken top bugger...and a excellent rider!!
Failing that try deano...also down your way...PM either of them...then report back!

My gut feeling is...you have mentally become used to the bike not handling very well around right handers...and your sub conciously hesitant...as I think TDC would have nailed any basic handling isusse's with his check over of the bike...but just incase my gut is wrong...let another rider have a go...and those guys are the dudes I would most likey trust with a honest opinion and have the ability to make that opinion...not to mention I know they won't drop your bike!!

[cowpoos]

I had a K1 GSX-R1000 a few years ago, with a similar problem. The bike had never been dropped, but had the front wheel bodgily fitted by a certain shop.
To solve the problem, I did the following:
Put the bike on paddock stands, the front an under the lower clamp type one
Remove front wheel
Ensured that both fork legs extended above the top clamp the same amount
Retorqued fork clamp bolts to specific torque
Removed nut from top triple clamp, and loosened fork clamp bolts on top clamp
Ensured top clamp, after lifting it slightly, was an even fit over the fork legs
Retorqued all top bolts/nut on clamp
Refit front wheel, torque up axle, leave pinch bolts finger tight for now
Spin front wheel as fast as you can by hand, applying front brake several times
Now torque up axle pinch bolts.

The forks felt very smooth after this, and the eye-ometer test for steering central was passed. Generally if there is a stiction problem, it is a give away that something isn't straight

My .05c worth, anyway
pumping the forks with no compression dialed on [will a very good positive force a few times with out using front brake]...instead of spinning the wheel is a better way on getting the forks centralized and alinged...disc have rivits which have a few mm of movement left to right..and using the brakes can guide axle to suit where the brake disc lay...

[Pussy]

Yeah, good call, Poos, that's another method I have used. Big thing is to let the wheel find centre, which a lot of people don't seem to bother about

[Chrislost]

There is also an issue with the high speed rebound valving on these forks and we have developed a mod that gives a huge improvement and allows the bike to hold a line more readily.

mine held a sweet full lock to lock tank slapper the whole way down the hill at pukekohe...

its standard.

[skidMark]

mine held a sweet full lock to lock tank slapper the whole way down the hill at pukekohe...

its standard.


yeah, but no but....you can't ride for shit...

when you are tank slapping a zxr250 ...then you worry

[Sketchy_Racer]

when you are tank slapping a zxr250 ...then you worry

Yeah you do, because there must be something seriously FUCKED UP on the bike to tankslap a 250.

[Sketchy_Racer]

I've had a bit of a set back. I went for a ride this afternoon on my test track (Rimutakas) and the bike although far better than before still has a small issue on the fast righthanders, I'm going to check the tripleclamps and bars. I inadvertantly glanced down in the triple clamp area when riding today and my first impression was they are ever so slightly on the piss. WHen on my bike, like in the shower is my best thinking spots, it dawned on me that the first time I felt the problem was at the trackday, which coincidently was the first and only time the bike has been on a ute, I'm now thinking we may have pulled something out of alignment with the tiedowns. Will get to the bottom of this yet. The bike is feeling great though!

Possibly also, (quite common) you have gained a preference for either left hand corners or right hand corners.

You are noticing a difference in handling left to right because you could be pushing the limits in one direction harder..

[cowpoos]

Possibly also, (quite common) you have gained a preference for either left hand corners or right hand corners.

You are noticing a difference in handling left to right because you could be pushing the limits in one direction harder..
exactly where my thoughts were leading in my last post!! and my gut feeling is telling me that!

[Fatjim]

pumping the forks with no compression dialed on [will a very good positive force a few times with out using front brake]...instead of spinning the wheel is a better way on getting the forks centralized and alinged...disc have rivits which have a few mm of movement left to right..and using the brakes can guide axle to suit where the brake disc lay...

I find if you loosen all the bolts off you can find and then go to the top of the hill and back, then tighten them up again you're a lucky bugger.

[Pussy]

Possibly also, (quite common) you have gained a preference for either left hand corners or right hand corners.

You are noticing a difference in handling left to right because you could be pushing the limits in one direction harder..

ALTHOUGH..... just check the rider sag settings. I had a ride on another 750 yesterday that is set up very similarly to my one ( same shock, forks set up slightly different), and the back end felt very different on right hand corners than my one. The only set up difference at the back is one or two clicks of damping adjustment, but a considerable difference in preload. Might be worth a crack

[Deano]

Farkin zooki's eh. Tell ya what - the SV looks pissed as a chook in the garage.......frame, handlebars, subframes.......all skewed to buggery.....no wonder it was written off.......goes ok on the track though when you are busy thinking about other shit....like how good Fabio looks in a pair of speedo's.......or hang on........, actually going FAST as a mofo.

It's amazing how much your brain plays tricks on you when you get an idea in your head.

Failing that - let me take it for a spin.

[KS34]

Deano since you are now the proud owner of a suzuki I'll let you test ride mine! Pop into the roastery at some stage to sort out a time, I'll even give you a coffee for your trouble. From honda nut to paid Suzuki test pilot, oh what a difference a day makes!!:Punk:

[Deano]

Deano since you are now the proud owner of a suzuki I'll let you test ride mine! Pop into the roastery at some stage to sort out a time, I'll even give you a coffee for your trouble. From honda nut to paid Suzuki test pilot, oh what a difference a day makes!!:Punk:

Is that you Ken ? :confused:

[KS34]

Yep, it is, If you could take the 750 for a run I'd really appreciate it so we can confirm or dismiss the problem.

[boomer]

Is that you Dad?? :confused:

[Kendog]

Is that you Dad?? :confused:



http://www.youtube.com/watch?v=GwExDG7n7Zg

[skelstar]

Is that you Ken ? :confused:
Its a coffee run then! Should Deano bring his lab coat and clipboard this time?

[Robert Taylor]

I have never noticed this on mine, but I may not be cornering at the speed required to show this.

This deficiency is by no means totally dependent on bike speed.

[Movistar]

This deficiency is by no means totally dependent on bike speed.

What's the cost to have the Mod done?

[Pussy]

Rock on round and have a go on the bike with the valving mod done, if you want, Paul. You'll like it!

[Movistar]

That's what I'm afraid of!

At the moment I'm more than happy with the stock set up.
You just can't seem to do anything wrong on this bike!
And if you do it's so forgiving. Sure there's always room for improvement, but I don't mind riding around some minor issues...that's some of the fun!

Back to the original issue; I'm not sure of your riding history KS34 but is it perhaps the way you corner through right handers? I realise you said it was since the ute/track day thing so possibly not, but I have noticed that mine was 'pushing' through the front till I changed the way I rode slightly and now it's all good, just a thought.

[KS34]

Thanks to all for your input, TDC for the info and tweaking,and Deano for taking time out for a test ride. The problem no longer exists, whether it is the ever so slight loosening of the steering head nuts, or a change in my riding whatever it was my wee gixxer is back to her old self! i took her for a thrash over the hill yesterday and apart from an arse-clenching moment with some diesel on the road all is well!

[Pussy]

Great to hear!! They are a fun little bike when they feel right