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Did run into another issue with the steering stop but just drilled and tapped the frame stop to m6 and fitted a bolt with a 4mm head and 4mm the other end which has given me good lock.

Got a 22mm 1mm pitch tap now to make my top lock nut to look factory, as you can see the zx12 top nut looks pants !
I thought there might be an issue with the stops but that is the correct solution :thumbup:
 

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Discussion Starter #42
Zumina even though the stops are in the same place the handlebars point further back and the forks are also further back with the lower offset.
The b model zx12's have a 4mm less offset than the a1/a2 bringing my conversion in line pretty much with newer models.
 

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I still wouldn't chance it. I have one in the stock setup... Anytime you change the stock geometry, even slightly, it is (not) a good idea.
Don't tell that to certain AMA race team that sawed an R-1 frame in half and welded the back half of an R-7 frame to it in order to have an adjustable swingarm pivot.

Of course, that was about a decade ago, so they surely must have crashed and burned by now.... :runaway:


BTW, I don't think you've deterred him, he's still posting..... :lol:


I've been running a VFR800 with RC51 upside down forks/triples/brakes for the past 6 years and zero handling difficulties. A little more ride height in the rear solved the longer trail problem due to triple clamp offset just fine.

The numbers are so close I'm certain he'll be good.

I await the results of the first road test of the ZX12/14r :mfclap:
 

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My forks are extended at least 1/2 inch over stock by cutting the internal stops, but raised thru the triples 10mm, and I run the ass end up close to 3/4 inch.. no idea what the resulting rake/trail is.. guess I should have burst into flame by now..

Don't want to even discuss my widow maker TL1000 with the Busa forks, raised swingarm pivot and shim on the rear shock... :)
 

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As you guys know... The point when you NEED a steering damper, and you don't have one, could possible be too late. The bike can handle perfectly, then that specific tire combination with altered steering geometry (even stock geometry) could result in tank slappers (once the tires are just worn that specific way).

I am honestly not trying to argue, I am more trying to plead.

I noticed that on my bike (stock) when I ride one handed (rest the other hand) I used to notice that the handle bars would giggle back and forth. Once I put the damper on, that went away. I am not saying that would ever lead to slappers, but I just didn't feel comfortable after I saw that.

Don't a lot of tracks require bikes to be fitted with dampers? I could be wrong, but I'm just assuming that when you start to push the bike, you increase the likelihood of having tank slappers.
 

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As you guys know... The point when you NEED a steering damper, and you don't have one, could possible be too late. The bike can handle perfectly, then that specific tire combination with altered steering geometry (even stock geometry) could result in tank slappers (once the tires are just worn that specific way).

I am honestly not trying to argue, I am more trying to plead.

I noticed that on my bike (stock) when I ride one handed (rest the other hand) I used to notice that the handle bars would giggle back and forth. Once I put the damper on, that went away. I am not saying that would ever lead to slappers, but I just didn't feel comfortable after I saw that.

Don't a lot of tracks require bikes to be fitted with dampers? I could be wrong, but I'm just assuming that when you start to push the bike, you increase the likelihood of having tank slappers.
spot on dude..a tank slapper on a powerfull bike at high speed will wipe u out...i had a nasty one on me r1 in 99...almost killed me ffs...i wont push me 12 untill i get meself one mofos
 

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Discussion Starter #50 (Edited)
Odd combination the 14 upper and the 12 lower pin mount.
Ive not seen the pin mount for the 14 ....perhaps it's close enough to
adapt to the 12?
I had to machine a bush for the upper triple as the zx14 stem diameter is 25mm the zx12 shaft is 22mm x 16mm long.
 

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I noticed that on my bike (stock) when I ride one handed (rest the other hand) I used to notice that the handle bars would giggle back and forth. Once I put the damper on, that went away. I am not saying that would ever lead to slappers, but I just didn't feel comfortable after I saw that.
Could be worn tires, loose steering head bearings, lots of things.

And a lot of bikes have a bit of a decel wobble at certain speeds with no hands on the bars, even if things are mechanically sound. It's a compromise between stability and handling.
 

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Could be worn tires, loose steering head bearings, lots of things.

And a lot of bikes have a bit of a decel wobble at certain speeds with no hands on the bars, even if things are mechanically sound. It's a compromise between stability and handling.
New tires, perfect balance, and great bearings. All bikes do this. It just turns back and forth very slightly. Most people wouldn't even notice it, as you dont feel it in your arm. But it was enough for me to say, what do I have to loose getting a damper...
 

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NONE of mine, and I have 4 bikes with different set ups, have a front wheel wobble or hunt on a smooth road.

Something is off, even as simple as misalignment between your wheels, preload difference in the forks, road surface...
 

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NONE of mine, and I have 4 bikes with different set ups, have a front wheel wobble or hunt on a smooth road.

Something is off, even as simple as misalignment between your wheels, preload difference in the forks, road surface...
Honestly... ride with only one hand holding the steering. You will see it. It does not sit perfectly straight. Every one of your bikes will do it, it is very slight, but is there.

It is something, I never noticed until I was paying attention, but from that point, I see it on all bikes.
 

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Could be worn tires, loose steering head bearings, lots of things.

And a lot of bikes have a bit of a decel wobble at certain speeds with no hands on the bars, even if things are mechanically sound. It's a compromise between stability and handling.
yep..when the front wheels hovers a little and comes down is when things can turn nasty...the 12r needs a damper full stop if ya gonna ride it hard.
 

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I've had my hands off the bars at around 90 before and she went straight and smooth as a babies ass. I do it at 50-70mph all the time goofin off. I even got pulled over for doing it once. I ride 1 handed all the time, highways, back roads, I even let go and go no handed coming to stops....never have I had a wabble in the front end of the 12R. Even hitting huge potholes (which we have plenty of here in good ol' Minnesota) on the interstate, she wabbles a sec and right back to good.

I had the problem on an old LTD750, but the suspension was shot on that thing and the tires were junk. Let go at 10mph and she slowly start to wabble, and steadily increase.

I will add, that after a couple of power wheelies this year, on touchdown, the front wabbled a bit, but I'm quite sure that was my own fault. I probably didn't have the wheel straight. They were nothing that would raise the blood pressure, but got my attn.
 

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I've had my hands off the bars at around 90 before and she went straight and smooth as a babies ass. I do it at 50-70mph all the time goofin off. I even got pulled over for doing it once. I ride 1 handed all the time, highways, back roads, I even let go and go no handed coming to stops....never have I had a wabble in the front end of the 12R. Even hitting huge potholes (which we have plenty of here in good ol' Minnesota) on the interstate, she wabbles a sec and right back to good.
I wouldn't say it is a wobble. The steering just moves a little. I could have ride with no hands, or one hand any day. It just moved slightly.
 

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Sometimes, when the front tire feathers, it may have a shake to it. These 12's love to chew on tires...:lol:
 

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I've had my hands off the bars at around 90 before and she went straight and smooth as a babies ass. I do it at 50-70mph all the time goofin off. I even got pulled over for doing it once. I ride 1 handed all the time, highways, back roads, I even let go and go no handed coming to stops....never have I had a wabble in the front end of the 12R. Even hitting huge potholes (which we have plenty of here in good ol' Minnesota) on the interstate, she wabbles a sec and right back to good.

I had the problem on an old LTD750, but the suspension was shot on that thing and the tires were junk. Let go at 10mph and she slowly start to wabble, and steadily increase.

I will add, that after a couple of power wheelies this year, on touchdown, the front wabbled a bit, but I'm quite sure that was my own fault. I probably didn't have the wheel straight. They were nothing that would raise the blood pressure, but got my attn.
try it at 100 plus dude...me mate on his gixer thou nearly lost it last week even with a damper fitted..if the bike had no damper he'de have come off for sure...i see it happen in front of me..he had to pop home and change his underware i tell ya..when the front wheel stops spinning then hits the deck it causes a tank slapper for sure...i would say with no damper fitted u watch that front wheel mofo
 

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Oh..my wheelies weren't intentional. They were results of hard acceleration. As far as letting go over 100mph...no thanks. I have held it one handed to 115 120 quite a few times....sitting straight up...rolling on fuckin with my buddies...that's bout when it's time to tuck and hang on.

I don't do intentional wheelies. I've always thought tho, that when you're up, you kinda wanna keep that front wheel spinning....gyro and such. I've never been one to "ride wheelies", as a kid on a bike or on motorcycles. I used to jump dirt bikes and quads over everything that had a lip...never did the wheelie thing tho...escapes me. Looks cool tho. Sometimes I feel like I should be doing one at certain moments...:headscratch:...I just like twisting the gas and taking off like a raped ape...
 
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