rpm speed cross reference

trykemike · 05-10-2007, 01:02 PM

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** · 05-11-2007, 05:26 PM

What tach are you running?

bigfour · 05-11-2007, 05:58 PM

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 · 05-13-2007, 10:46 PM

Quote:

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 · 05-14-2007, 03:35 AM

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

Ofnoan · 05-17-2007, 03:29 AM

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 · 05-17-2007, 03:47 PM

Heh.

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

Its fine.

trykemike · 06-20-2007, 06:53 PM

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 · 06-20-2007, 08:54 PM

Is this a good thing or a bad thing

Sarris · 06-20-2007, 10:13 PM

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?
:??:

05-10-2007, 01:02 PM	#1
trykemike Senior Member Join Date: May 2007 Location: toronto ont canada Posts: 177	rpm speed cross reference 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 __________________ sds4 Login or Register to Remove Ads
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05-11-2007, 05:58 PM	#3
bigfour Member Join Date: Oct 2006 Location: CT, Norwalk Posts: 51	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. __________________ Login or Register to Remove Ads
	0

05-14-2007, 03:35 AM	#5
Water Warrior 2 Senior Member Join Date: Dec 2006 Location: Squamish B.C Canada Posts: 11,409	bigfour, the bike isn't angry, it is yelling for more throttle. Login or Register to Remove Ads
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06-20-2007, 06:53 PM	#8
trykemike Senior Member Join Date: May 2007 Location: toronto ont canada Posts: 177	rpm speed cross reference 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. __________________ sds4
	0

06-20-2007, 10:13 PM	#10
Sarris Senior Member Join Date: May 2007 Location: New Port Richey, Florida USA Posts: 1,348	Higher Gearing 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? :??: __________________ Prudent riders live longer than moron riders.
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05-11-2007, 05:26 PM	#2
jonathan180iq Super Moderator Join Date: Jan 2007 Location: Dalton, GA Posts: 3,996	What tach are you running?
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05-17-2007, 03:29 AM	#6
Ofnoan Junior Member Join Date: Jan 2007 Location: Jerusalem, Israel Posts: 5	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...
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05-17-2007, 03:47 PM	#7
Jordan310 Senior Member Join Date: Feb 2007 Location: Los Angeles Posts: 122	Heh. Nah youll be fine. I do 60-63Mph in 4th all the time. Its fine.
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06-20-2007, 08:54 PM	#9
Jordan310 Senior Member Join Date: Feb 2007 Location: Los Angeles Posts: 122	Is this a good thing or a bad thing
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