rpm question

  • redneckcarrow
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19 Jun 2011 00:29 #458127 by redneckcarrow
rpm question was created by redneckcarrow
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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19 Jun 2011 21:13 #458235 by hypnohio
Replied by hypnohio on topic rpm question
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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19 Jun 2011 22:46 #458256 by redneckcarrow
Replied by redneckcarrow on topic rpm question
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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19 Jun 2011 23:50 #458268 by WABBMW
Replied by WABBMW on topic rpm question
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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20 Jun 2011 00:28 #458272 by 650ed
Replied by 650ed on topic rpm question

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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20 Jun 2011 01:45 #458280 by loudhvx
Replied by loudhvx on topic rpm question
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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20 Jun 2011 17:26 #458374 by redneckcarrow
Replied by redneckcarrow on topic rpm question
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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22 Jun 2011 19:41 #458786 by redneckcarrow
Replied by redneckcarrow on topic rpm question
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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