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Thread: OK, Convince me

Created on: 08/10/14 09:25 AM

Replies: 94

Rook


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Joined: 03/28/09

Posts: 20606

RE: OK, Convince me
08/18/14 10:30 PM

You come on out....I'll be here for ya;)Will have some vacation time aligned by then...let me know....may not be as cold as ya think.

ok.

As far as the conversation about mods v stock for street riding, I have to agree that some mods won't amount to a hill of beans for most riders. I've bought race tires 3-4 times now and they haven't been any better than the more street oriented tires I have ridden on (worse, in fact). I'm trying Supercorsas just this one last time and if I don't wear the chicken strips down to 1/4", what's the point until I can wear a BT-016 to the edge? As far as weight reduction mods, they DO make the bike handle better at all speeds for any level rider. The hp/speed/acceleration mods??? IDK that they get used by me for more than fifteen seconds at a time but they sure are a kick in the pants! To tell you the truth, I'd love to own a 14r but if it was stock, I'd prefer my modded 14 (which is most likely getting Ohlins suspension and flash in the next month). A modded bike is just a whole lot more exciting to me. It does look, feel and ride much different even if you can't be on a racetrack. It's always fresh and more unique and more special to me. Nothing wrong if you don't have the mod bug. You'll save a lot of money and you'll still go fast when you want. You'll never know how much distance .1 seconds in the quarter mile means unless you race a modded 14r. then it will be obvious(like the other bike shot out in front of by several bike lengths). but who ever does that on the street?



'08 MIDNIGHT SAPPHIRE BLUE Now Deceased

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Rktsled


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Location: Big D

Joined: 08/10/14

Posts: 365

RE: OK, Convince me
08/18/14 11:08 PM

Grn14 I am going to assume you have checked the steering head bearing for play along with them stem for tightness. A lot of times the factory puts VERY little grease in the heads and if they get dry they can cause a wiggle, sometimes.

If you have lowered your bike on the tubes this decreases your rake and trail which would affect steering, plus lowered bikes tend to overheat a little due to reduced airflow. On MOST bikes you almost can't lower them enough to cause instability and the 14 is normally a very stable platform.

Check your tire balance. I threw a wheel weight a year or so ago which caused a wobble due to the imbalance, took a while to figure it out because I didn't notice the weight missing. New weight, wobble gone.

Check front and rear axels and wheel bearings. Make sure axels are snug and bearings turn freely, the slightest little rough spot could mean a bad bearing.

Last thing, and it's very unlikely, check the swing arm pivot and make sure it's snug too, kinda rare for them to get loose but it does happen.

Hope you get it figured out soon, can be tuff to chase down sometimes.



Rktsled
2013 ZX-14R with lots of mods, quick and comfortable.

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Hub


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Joined: 02/05/09

Posts: 13724

RE: OK, Convince me
08/19/14 12:34 AM

Grn,

I have no clue?
Can't Be:
Tire pressure ~ Happens and then sometimes not.
Balanced tires ~ Happens and then sometimes not.
Steering setup ~ Happens and then sometimes not.
Suspension setup ~ Happens and then sometimes not.
Tires ~ Happens and then sometimes not.
Seating position ~ Happens and then sometimes not.

If I narrow it down to that, now I add speed or really, rpm feed, wiggle is 1-2-4~3-1-2-4~3-1-2~4-3. That video I have where I can hear the front tire wrinkle from the braking, then the 4~3~1~2~4-3-1-2 tire breaking loose on the accel. Sounds like you are getting on the cam and when kinked over, the rpm rises, you are on the gas and it's breaking loose is all. Just stay in it you start drifting.

And that's a lot of correcting up front. Never back out of it. Why? "You have more control riding faster." That's a young Colin Edwards paraphrase if not the quote. Yammie made a tribute video on his retirement in Texas this year. Stand up when it comes back around so the whip slows you down. It takes that mass off the seat and you'll figure the rest out. Probably not it, but that's my guess in the happens sometimes scenario. I could be wrong about the tire speeding up, trying to get ahead of the bike, the throttle input, the speed, rpm, and mother tea's torque.



Tormenting the motorcycling community one post at a time

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Grn14


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Location: Montana

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RE: OK, Convince me
08/19/14 7:51 AM

Thanks all;)...all good ideas.Gonna try out a different brand of tires next go round.Something with a higher center profile.It doesn't take much wearing down the middle to have an influence in some situations.After my last experiences with these same(brand/model) tires...I'm thinking it could be these doing it.They might be excellent for cruising and those speeds...but I'm suspecting they aren't too great for 'higher' speed handling....130 really isn't that fast for these roads...(sweepers).And I've never had to stiffen up my suspension like this before(except on that last set of tires).Even that didn't(fully) correct the problem.It helped...but the wiggle started entering at lower and lower speeds.Made it almost impossible to rail at say..100 and feel secure.Installed these new ones...wiggle disappeared completely.It's starting to return again(as I said).


It doesn't happen on quicker curves...where the transitioning is quicker.Only the big sweeps,where the speed can be increased through the turn.That's when it happens.Plenty of time to readjust body position and stuff at the entry and throughout.I KNOW this bike can handle these turning speeds.


And to Hub in particular here...you don't suppose that rear actually COULD be slightly breaking loose,do you?I rarely have KTRC on.Just the thought of having the rear totally break free doesn't appeal to me at all leaned in on the street.


The more I consider what's going on...the more I think I should just dial her back a bit...and enjoy the bike at safer speeds.It's pretty iffy trying to 'race' through these turns with other people sharing the road....even if there appears to be plenty of room and all.I need to stick to my plan...and drive smarter;)


What I find 'strange'...is with my 07...I was able to remove any and all chicken strips in short order,at less speed(s).Here,I'm railing 'much' faster on the same roads...and still can't get the strips off.I've NO idea why that is.Been using Pirellis mostly throughout my ridings.Something IS different with the 14R.My riding style really hasn't changed much from my 07 to my 2013.Maybe the 'newer' generation of tires from Pirelli...at least the sport touring tires...have changed somehow????I know they said the compounds and such have improved.Could it be causing this kind of chassis behavior?

One thing I haven't heard...is...have any of you guys experienced this on YOUR 14's?I do think the mechanical situation with my bike is fine.I've checked and rechecked the stuff mentioned here...nothing amiss.


* Last updated by: Grn14 on 8/19/2014 @ 8:40 AM *

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KoflaOlivieri


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Location:

Philadelphia, PA

Joined: 02/17/12

Posts: 1805

RE: OK, Convince me
08/19/14 8:48 AM

The more I consider what's going on...the more I think I should just dial her back a bit

I think I heard that one before, lol


Grn14 said:
I'm too undisciplined...that's the truth.I ride too aggressive for the street.Take too many chances actually...knowing this bike can do that at will.Gonna catch up to me if I don't plain send her away:(...already had a few serious wrecks with my 14's over the years...I don't think I can deal with another one.I'm not scared...that's the problem LOL.

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Grn14


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Location: Montana

Joined: 02/25/09

Posts: 15511

RE: OK, Convince me
08/19/14 8:53 AM

LOL!!!Thanks Kofl for the reminder...ALWAYS helps to get a second opinion;)Okay...I'm gonna try THIS just for the heck of it...I'm gonna ride in KTRC '1' as a test here...on these same curves where this is occurring.Same speeds(for the moment)...and see what happens.Then try KTRC '2'...if it's still happening.It may be the tires are just not up to the 14's weight and speed for this.If the KTRC stops this stuff...then I'll know for sure....NOT to get these tires againLOL!!!!!!


AND...no way am I ditching my beloved 14....they'll have to pry it from my dead hands to get herLOL!!!


* Last updated by: Grn14 on 8/19/2014 @ 8:56 AM *

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Hub


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Joined: 02/05/09

Posts: 13724

RE: OK, Convince me
08/19/14 9:25 AM

If the center is worn, consider the whole tire as think about this. Stiff wise, that rubber in the center was keeping the tire carcass a lot stiffer when new. Wear down that rubber on the 3 areas and the carcass goes weak and that may be your wiggle.

To clear the table of that variables, are both new front and rear tires, so no scotched input of something used is happening toward something new. New/New clears most of the list.



Tormenting the motorcycling community one post at a time

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Romans


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Location: Toronto,ON

Joined: 02/13/09

Posts: 5926

RE: OK, Convince me
08/19/14 10:05 AM

AND...no way am I ditching my beloved 14....they'll have to pry it from my dead hands to get herLOL!!!

Dibbs Rofl,, sorry buddy I had too. Just being a Ass, going to my Room now.

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VicThing


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Joined: 07/17/14

Posts: 2364

RE: OK, Convince me
08/19/14 3:56 PM

I think it's just the road surface.

Don't dismiss this so quickly. It very well could be the road surface even in different areas (well, let's consider that 130 mph curves can't be around too many places). But you could be getting into tire grooves and this is causing the oscillation you're experiencing.

Last night I got kind of spooked coming off a 170+ blast. Slowing down and finishing the road I had a notable front end wobble/thump that I thought I had flat tire. I think it was just the roadway though. Either that or momentarily the tire warped or something causing this. I used to run my VF1000F down the same road, but that was 15+ years ago. It hasn't changed much but probably is a little less even than back then (old school cement 4 lane divided highway). And yes, I just serviced the bike (fastener check/air pressure etc.) so I know it wasn't something like that.

What's your vacation time look like Vic?

I'll keep this in mind. Probably wouldn't work out this season but who knows maybe next!

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Grn14


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Location: Montana

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RE: OK, Convince me
08/19/14 6:39 PM

"Dibbs Rofl"..., Unfortunately...I'm not in the habit of having anything left on my bikes after wreckingLOL!...wouldn't be much good to ya Romes;)


"But you could be getting into tire grooves and this is causing the oscillation you're experiencing"...very possible..


* Last updated by: Grn14 on 8/19/2014 @ 6:41 PM *

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Silverback61


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Location: Midwest

Joined: 08/03/14

Posts: 145

RE: OK, Convince me
08/19/14 7:50 PM

Forgive me for being foolish, my ZX-14 is a keeper. I was just having a bit of buyers remorse for buying a used bike.
In the past I have always purchased brand new, but this ZX-14 is solid and is quite a machine.

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Grn14


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Location: Montana

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RE: OK, Convince me
08/19/14 7:57 PM

"Forgive me for being foolish, my ZX-14 is a keeper"......Kofla?Here's another one...LOL...once hooked,s'all over.NOTHING can outride in smoothness or fun the zx14!!!!Most excellent choice there Silver;)

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KoflaOlivieri


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Philadelphia, PA

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RE: OK, Convince me
08/19/14 7:59 PM

Lol

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Blkcasper


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Location: California

Joined: 10/28/12

Posts: 766

RE: OK, Convince me
08/19/14 11:45 PM

Grn a couple things to look at.
A: roads change angle when going in either direction. Say going into a turn going to the right your on what I would say is the high side banked or angle wider. Going through same corner in opisite direction road banked lower or sharper. Different angle or lean needed when entering corner. Look at tire wear on inside when goingin a left turn. Now go in opposite direction thru same corner. Look at tire wear on inside thats used thru same corner. You will probably see you are using a part of the tire that hasn't been scrubbed in yet. This has happened to me many times.
What I have found is that im leaning over father In one direction or the other using traed on the side wall tbat hasn't been used before. Causing the slipping feeling when leaned over into a corner. Look at the edge of the tires after going thru that last slippery corner.
Also some times as your railing thru that same familiar corner at those speeds you can tend to apply more throttle trying to pull harder through the apex for more speed for the next straight. Hence sliding the rear wheel which is normal.



Luvin My ZX14R'S.

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Grn14


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Location: Montana

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Posts: 15511

RE: OK, Convince me
08/20/14 7:51 AM

You think it could be this all the time?And not tire problems or suspension?I did actually look at the rear(and front)tire treads this last time it happened when I stopped at my usual 'rest' stop along the way.The wear was new...and closer to the edge by about 1/2 inch(the new wear that is).Truthfully,I have noticed my cornering speeds and how I add throttle in the turns now has increased.That'd be great if this is all it is;)I'll see again about the throttling thing next time I hit these curves where this is happening.Thanks BLK for the observation....glad I'm not the only one having this going on.Do you think that enabling KTRC would affect this?I mean...kinda stop it from happening...or is it so 'small' a slipping that it probably wouldn't kick in the traction control?


* Last updated by: Grn14 on 8/20/2014 @ 7:53 AM *

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Grn14


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Location: Montana

Joined: 02/25/09

Posts: 15511

RE: OK, Convince me
08/20/14 8:43 AM

OKAY...BLK...you solved it...yes you did;)I just went out and looked at my rear tire.What appeared at the time to be 'a chicken strip'...actually was the rubber being worn in a different way.The rubber from the last wear marks(before)was normal scrubbing.THIS wear is smooth and I was hitting the very edge...almost past the very edge...and the rubber surface was melted.Looks like tiny 'cracks' actually running laterally across that area of about an 1 and a half inch up the profile right there.Consistent all the way around the tire...BUT...you can see where it looks like the tire(bike)was digging in a bit deeper...the wear scrubs kind of increase and decrease along that edge of the tire.But remain all the way around the edge.I've never noticed that before.So my guess is...as you say...the tire is slipping just a tad...as my speed increases.Gotta be.Thanks again man....All this time I thought 'WHY do I still have these strips on here?"...they really aren't on there...the wear is all the way out...but smoother.(and melted looking as well).And though both sides look 'almost' the same...yes..I can see where the RIGHT side(right handers)is a bit more 'worn'.That's where the wiggle was occurring...on the fast right hander(s).The lefties didn't seem to be doing it,at least not like the right ones...and that's probably from the curving speed of those turns.They were shorter and wouldn't allow faster velocities.


I've got just one last question for you Blk then...do you think this wear and stuff indicates I've reached the 'safe' limit of grip in these situations with these tires?I don't want to lowside.Thanks man...


What I've been trying to do with THIS set of tires is go mild on the straights,and hard on the corners to get the wear across the profile more even...I apparently been hitting that tire edge for some time now...and didn't realize it.But the scrub marks are right there...all the way across.May have been the light or something causing me to not actually know what I was looking at?


* Last updated by: Grn14 on 8/20/2014 @ 9:09 AM *

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Blkcasper


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Location: California

Joined: 10/28/12

Posts: 766

RE: OK, Convince me
08/20/14 12:59 PM

Grn there are a lot of things to look at. Road conditions,outside temperature, tire temp, tire wear, tire air temperature, these things change all the time. Without seing a picture of you tires hard to tell. If you really want to learn all you can about what your bike can do. I strongly recommend that you do a track day. I know it can be expensive and may there's not one close to you. But there is only so much you can do and learn while riding on the street safely. Yeah you can aslo get hurt or whatever on the track too. But you'll learn so much more in 1 day of track riding than you will in years of street riding. The experience alone is woth the price of admission.



Luvin My ZX14R'S.

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Grn14


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Location: Montana

Joined: 02/25/09

Posts: 15511

RE: OK, Convince me
08/20/14 9:03 PM

I hear ya Vic....if only.No joy here for any tracks.


I took her out again after work today...hit my 'testing curves'.One of em...a left hander...I was able to safely hit 140 with no problem...could have gone faster.Then the right hander....got er up to 135....then a weave began...not as much as previously however.I'm gonna chalk this weaving thing up to road surfaces.Attainable speeds in right/left handers...uphills and downhills...are so variable...


I'm gonna stick for now with my suspension settings....they seem top be overall very close to getting the bike to be stable at nice speeds...with the ability to power up some throughout most of these curves.I'm happy with it.No need to push any harder really.Hell...most of em...they're 'sweeps'...but the radius's just won't allow the 14R to rip insanely safely.I'm good with that.It IS the street...not a racetrack...so it's all good.I will make one more 'test' however.My next set of tires will be something different...just to see.These Pirelli Angel GT's ARE a really good tire...but I just don't think they're really made to carve a heavy bike really hard.More for Touring I feel.You know...Connies,FJR's..bikes like that...Honda ST's.NOT the torque of the 14R in lean at speed.They do GREAT at 100...110..120...but after that...???????


I really payed attention to the road cambers while riding today.The higher speed ones without any wiggling were definitely 'banked' to some degree.


* Last updated by: Grn14 on 8/20/2014 @ 9:05 PM *

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VicThing


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Joined: 07/17/14

Posts: 2364

RE: OK, Convince me
08/21/14 5:48 AM

Here's some highlights from my ride last night. RktSled I think I spotted you on Dupont (in the video).

https://www.youtube.com/watch?v=VGDa50EJYRE

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aegisranger


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Western Pennsylvania

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Posts: 192

RE: OK, Convince me
08/25/14 10:25 AM

I suppose one big difference between me, and most of you is the available roads

Here's some highlights from my ride last night

Wow Vic, you're right... it's flat flat flat out there. Quite a lot of traffic too.



After 3 seconds of full throttle, everything else on the road becomes 'Oncoming Traffic'...
1991 Suz VX800(project), 1986 Suz Savage (daughter's bike), 2001 Ducati 748, 2007 Honda VFR800, 2015 Kawasaki ZX14R, 1987 Buick Grand National, 2013 Subaru BRZ

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