Top Speed

I was reading a post earlier on top speeds.And one guy asked how fast will these kzs go.One guy replied real top speed is prob 115 mph.
I have a 1978 Kz1000 1075 kit,29mm flatslides,Header,!5 tooth front sprocket,33 rear.
I had my speedo checked it is 3mph fast.
Tonight i was in third gear 100mph at 8500 rpm.It was dark so i backed off there lot of deer around here.
So for me i will keep ya posted but i think i can pass 135 easy.And it did not take long to get there.

i have a stock 1974 z1 900, and i have had it up past 100 mph many times with no probs. Tonight i was out on the highway, i kicked it up to around 105, man was that kinda freaky, needless to say i only held it there for a couple of seconds.

Guys...watch out for those deer....Seriously...they come out of nowhere and they get no traction on paved roads....

Keep yourself Alive

And also watch for dogs crossing right in front of you and your Z1 as both approach 125 mph. Don't ask ...:ohmy:

ok i am not sure of your ratios and what you go to for redline. but going off the specs page
if we say 8500 redline. a 2.190 primary ratio, 1.040 fifth gear ratio. and your final of 2.2 added up to a final overall ration of 5.430. which when divided gives you 1565 rpm of the rear tire. estimating about a 80 inch circumference gives you a forward travel of 125230 inches per minute. then cross multiply with i mile per minute gives you a speed of about 118 mph.
now if you spin it up to ten grand you would be going about 139.5 mph
now i figured in a few estimates and guesses but numbers do not lie.

Or, Matt, you could just gun it!!!
124 mph here. But... is the speedometer right? I think they used to bump up the speedometer reading so you think you are going faster.

Post edited by: Ray J, at: 2007/08/18 11:33

I also have a steering stabilizer.

Ray J wrote:

Or, Matt, you could just gun it!!!
124 mph here. But... is the speedometer right? I think they used to bump up the speedometer reading so you think you are going faster.<br><br>Post edited by: Ray J, at: 2007/08/18 11:33

All of the speedos on older bikes like ours are slightly "optimistic".
ex: indicated speed - 124 mph
actual speed - 119 mph

Mount a lower or higher profile tire (or smaller/larger diameter wheel) on the front, and it can throw the indicated and actual speeds off even more.

id say its safe to say the top speed no matter what it may be greatly exceeds what the average person will ever attempt and what any of the roads around these 50 plus states are capable of handling safelyB)

I just tweaked 40mph out of my girl's Ciao...

Ratios for a 900 or 1000 are
primary- 1.73
5th gear- 1.22
rear (w/15-33)- 2.20
if you can pull 8500 in high you'll be around 147 mph with a 26" rear tire, better be down hill & with the wind if stock. :laugh:

about
57 in 1st
82 in 2nd
107 in 3rd
130 in 4th