TOPIC:

will61310 wrote:

Being a big fella, how do you find the seating positions on the newer stuff? Im a larger guy as well and they just dont seem like i could spend any long periods of time on them. A ZRX or Bandit would be about as new as i can go, or a concours/wing/harley i suppose.

That's maybe another reason I prefer old bikes, I can't seem to fit on new ones. When I look at a new connie at the dealership I drool and pop a half shaft, but as I walk up to it I realize it looks like a minibike. A connie is not a "small" bike by any means, I mean it's 1400cc's and the front fairing is quite wide, but I can't bend my ankles and knees like that even for the 30 seconds in the store let alone hours on the road.

I'm a big guy too and a buddy of mine has a GSX-R 1000, I rode it for about 15 minutes and my hips were killing me. The position is just like riding a race horse, you are basically in a continual squat. They are just not designed for us fatsos lol.

was just over on the yamaha owners site,seems that theyre having problems with cranks and rods going junk on 0n the 06-07 r6 models. sure am glad the new bikes are so overbuilt! looks like theyve also had issues with countershaft sprockets nuts backing off destroying engine cases,coils shorting out........ uh oh looks like theyve got noisy topends and valvetrains also! thank god for the yamaha owners site or would never know how good they actually are. oopsies forgot bad valve springs! transmission problems,ecu problems

from hyabusa site:cracked frames and or sub frames.transmission problems.fuel injection and ecu problems.hydraulic clutch leaks.tires wearing funny......cam chain tensioner failure,glad to see theyve gotten that issue solved .with all this new technology you think they could make a tensioner that would hold up to a 13000 rpm motor!

otakar wrote:

I did not want to read the whole thread, because about half way threw the first page things started to get a bit PISSY. This than could have been already covered. In the old bikes our engines were almost SQUARE. When the 900 was square and the Z2 which was the original concept was a long stroke. As the engine progressed it did not change much threw the J motor. Because these engines had a relatively long stroke to bore ratio, the pistons could have long skirts because there was enough room. The new engines are so over square, that there is not enough room to support the long skirt for clearance and piston mass. The cranks got lighter to support the high RPM and the pistons had to reflect the mass differential also. Where can you remove mass? Well it sure cant be from the crown, so the skirt starts to disappear. So in a short explanation; when you have a grossly over square engine which has a light crank shaft you have no choice than to remove material from the piston skirt. It must be realized that these new bikes turn 16K or more.

The End

Here is a good article that will explain quite a bit.
en.wikipedia.org/wiki/Stroke_ratio#Square_engine_examples

otakar wrote:

otakar wrote:

I did not want to read the whole thread, because about half way threw the first page things started to get a bit PISSY. This than could have been already covered. In the old bikes our engines were almost SQUARE. When the 900 was square and the Z2 which was the original concept was a long stroke. As the engine progressed it did not change much threw the J motor. Because these engines had a relatively long stroke to bore ratio, the pistons could have long skirts because there was enough room. The new engines are so over square, that there is not enough room to support the long skirt for clearance and piston mass. The cranks got lighter to support the high RPM and the pistons had to reflect the mass differential also. Where can you remove mass? Well it sure cant be from the crown, so the skirt starts to disappear. So in a short explanation; when you have a grossly over square engine which has a light crank shaft you have no choice than to remove material from the piston skirt. It must be realized that these new bikes turn 16K or more.

The End

Here is a good article that will explain quite a bit.
en.wikipedia.org/wiki/Stroke_ratio#Square_engine_examples

thats easy stick a chevy 292 6 cyl next to a 302 chevy!

kawasaki zx-11 crank/rod problems,trans problems

PLUMMEN wrote:

from hyabusa site:cracked frames and or sub frames.transmission problems...

To be fair - The things makes 160+RWHP and 100+lbf...stock.

I raised the torque on my KZ shafty from 45 lbf to 65 lbf and it wouldn't run in a straight line till I pulled the swing arm and braced it.

Here's a good video of Charlie Anstaett's turbo Hayabusa

256mph and 636RWHP on a stock crank shaft, stock front end(not raked) and stock chassis...

At the end his builder says "it's pretty much a stock bore, stock stroke motorcycle with 8:1 pistons and a lot of boost)

yeah i have no doubt about how fast they are ,ive ridden a built busa on a heavy dose of juice and have a 07 zx14 with a turbo i bought down south thats insanely quick.but youre only gonna keep a 636hp anything together for so long before something goes bang! thats why they sell those fancy cranks and rods for busas

davel wrote:

PLUMMEN wrote:

from hyabusa site:cracked frames and or sub frames.transmission problems...

To be fair - The things makes 160+RWHP and 100+lbf...stock.

I raised the torque on my KZ shafty from 45 lbf to 65 lbf and it wouldn't run in a straight line till I pulled the swing arm and braced it.

Here's a good video of Charlie Anstaett's turbo Hayabusa

256mph and 636RWHP on a stock crank shaft, stock front end(not raked) and stock chassis...

At the end his builder says "it's pretty much a stock bore, stock stroke motorcycle with 8:1 pistons and a lot of boost)

we still on this shit?
i really don't care at all.
my bike runs and unless plummen lets me flog that zx14, i could really care less.
tall, short, new, old, who gives a shit ?
just ride the damn thing and know if you flog the hell out of it, you will be doing a rebuild earlier than you want to.

flht1997 wrote:

This was/is a great thread, lots of toes getting stepped on. Peoples opinion is there own, but oh how they fight for them eh? the statement that modern sport bikes are unreliable and require more engine repairs really floored me, my opinion is that modern bikes are subject to the best engineering, testing and metallography that was only dreamed of when the KZ was in development and are the most reliable and resilient bikes ever made. And the statement that new plastic bikes wont be around in 30 years? Come on man that is just ridiculous. I will guarantee you in 25 years that whatever medium we are using to sell stuff that it will be full of CBR900RR and Hayabusa's bringing very good money.
The production ZL-1 had steel sleeves. The CAM-AM zl-1 had a high silicon content aluminum, but it didn't work and they ended up plating the pistons with something. The technology of the 60-70's is antiquated at best and pointless to compare to today manufacturing practices.

Sorry dude, but if as you say "modern bikes are subject to the best engineering, testing and metallography that was only dreamed of when the KZ was in development and are the most reliable and resilient bikes ever made" why were the Suzuki GXS-R frames breaking in two so badly that they were recalled?

Modern Junk