rpm question

  • redneckcarrow
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rpm question

19 Jun 2011 00:29
#458127
have a 1980 550 ltd in high gear 6th at about 50 mph the tac reads about 4000 rpm is this normal or do you think some one changed one or both sprokets

thanks redneckcarrow
1980 kz 550 ltd stock

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  • hypnohio
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Re: rpm question

19 Jun 2011 21:13
#458235
Don't know about the 550, but that's right for my 440. In 6th gear it's a "10" difference, i.e., 65mph - 5500rpm, 60mph - 5000rpm, etc.
1982 KZ440 LTD
2003 EN500 C
2006 Virago 250

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  • redneckcarrow
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Re: rpm question

19 Jun 2011 22:46
#458256
took for a ride today was off on mph its 45 at 4000 rpm but what you have said guess its normal.
dont redline till 9500 on tack and what i have read top speed is about 80 mph so i guess it makes sence thanks
1980 kz 550 ltd stock

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  • WABBMW
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Re: rpm question

19 Jun 2011 23:50
#458268
With everything stock, my '82 KZ650 turned 5,000 at a GPS verified 60 MPH, which is about 63 on the speedometer, for what that is worth.
Bill Baker
Houston, Texas
1982 KZ650 CSR
2008 Yamaha FZ1
2006 Yamaha FZ1
1977 Honda Supersport 750 four (sold)
1984 Honda Nighthawk 650 (sold)

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  • 650ed
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Re: rpm question

20 Jun 2011 00:28
#458272
redneckcarrow wrote: took for a ride today was off on mph its 45 at 4000 rpm but what you have said guess its normal.
dont redline till 9500 on tack and what i have read top speed is about 80 mph so i guess it makes sence thanks

I don't think so!
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)

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  • loudhvx
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Re: rpm question

20 Jun 2011 01:45
#458280
I made a gearing/speed/RPM calculator for the 550's. It's in my signature. You just have to measure the rear tire circumference.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.

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  • redneckcarrow
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Re: rpm question

20 Jun 2011 17:26
#458374
thanks loudhvx will have to measure tire and check sprokets maybe tack or speedo is off
also noticed the manual down loaded that been looking for one been to 3 bookstores now one could find it so thanks big time
1980 kz 550 ltd stock

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  • redneckcarrow
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Re: rpm question

22 Jun 2011 19:41
#458786
loudhvx did speed/rpm calculator yea my gauges dont match so something is off speedo is allmost 5mph or tach is 3500 rpm off will have to find gps and check

ps used your online manual last night to check couple things very helpful thanks
1980 kz 550 ltd stock

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