rpm speed cross reference

[trykemike]

here is a list of values that may be usefgul :

gear rpm mph kph

4 4500 35 55
5000 40 65
5500 43 70
6000 47 75
6500 51 83
7000 55 90
7500 59 97
8000 63 101

5 5000 49 80
5500 54 85
6000 58 95
6500 63 101
7000 68 115
7500 73 120
8000 78 125

[jonathan180iq]

What tach are you running?

[bigfour]

Hey thanks, I didn't know the GZ could go that fast in 4th without redlining, mine sounds angry if I get near 40 in 4th.

[Badbob]

Originally Posted by bigfour

Hey thanks, I didn't know the GZ could go that fast in 4th without redlining, mine sounds angry if I get near 40 in 4th.

I rode mine for a couple of hours once at 60-65 mph in fourth gear. It was the only way I could get over fifty in the head wind. Lots of vibration but that was about it.

[Water Warrior 2]

bigfour, the bike isn't angry, it is yelling for more throttle.

[Ofnoan]

Hmmm... My mechanic mentioned that I should not exceed 100 kph (60-65 mph) if I want my bike to last... After all it's an air cooled engine...

[Jordan310]

Heh.

Nah youll be fine.
I do 60-63Mph in 4th all the time.

Its fine.

[trykemike]

The figures quoted are calculated using the final drive ratio and gear ratio. I used a calulator that I found on the web. The values relect values that I have acheived on my speedo and have calculated using wheel circumference and rpm @ specified engine rpm.

Re: the 16 tooth mod . Here are some calculated values.

5 th gear
49 mph 4750 rpm
54 mph 5250
59 mph 5750

here are to same speed with 15 tooth sprocket

5 th gear
46 mph 4750 rpm
53 mph 5500 rpm
60 mph 6250

there seems to be a definite drop in engine speed in the 50 - 60 mph range which is the cruising speed for this machine.

[Jordan310]

Is this a good thing or a bad thing

[Sarris]

My bike seems to run better & stronger with the 16 tooth gear. My concern would be the clutch if anything. I wonder if Barnett or anyone else makes a heavy duty spring & clutch plate kit for it?
:??: