engine RPM's

  • KZSteelers
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engine RPM's

14 Dec 2006 06:51
#99514
I have a 1980 KZ650LTD.

When I'm cruising at 60, its turning about 5000 RPM's. This seems like its screaming.

Is this a normal crusing RPM?

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  • The Gringo
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Re: engine RPM's

14 Dec 2006 07:03
#99516
Sounds pretty much normal. I have always thought the 650's needed a 6th gear. One thing you might try is adding one tooth to your countershaft sprocket. You will sacrifice a little out of the hole acceleration, but it makes the bike nicer at cruising speed.
Andy
Akron, Ohio
80 Z-1 Classic-Sold
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  • OKC_Kent
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Re: engine RPM's

14 Dec 2006 07:23
#99522
My '78 650 has the stock gearing, 16/42. It turns about 4700 rpm at 60. I think the LTD's are a bit different, maybe due to a different rear wheel?? But like Gringo said, go up a tooth on the countershaft sprocket.
Cashion, OK
78 KZ650 B2 85,000+ miles

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  • madderkaw
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Re: engine RPM's

14 Dec 2006 07:46
#99526
My 80 650 LTD is doing 70 at 5000 rpm's. 60 is closer to 4500. It still needs another gear though.

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  • JMKZHI
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Re: .

14 Dec 2006 07:59 - 03 Dec 2008 11:23
#99530
del
Last edit: 03 Dec 2008 11:23 by JMKZHI.

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  • freebyrd24
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Re: engine RPM's

14 Dec 2006 13:02
#99599
My stock 650SR turns 5500 at about 55mph. I wish they came with a 6th, i love the power off the line though
- 1981 KZ1000-K1 LTD - Long term project
1075cc Kit - New Wiseco Pistons

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  • mariozappa
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Re: engine RPM's

14 Dec 2006 13:04
#99600
I went with a 38 tooth on the rear and really takes away the want for a sixth gear. I haven't noticed any loss off the line though.
1977 KZ650C1
and the KZ650/KZ750 Conversion ;)

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  • JMKZHI
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Re: .

14 Dec 2006 13:18 - 03 Dec 2008 11:21
#99601
del
Last edit: 03 Dec 2008 11:21 by JMKZHI.

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  • steell
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Re: engine RPM's

14 Dec 2006 15:51
#99618
JMKZHI wrote:
Hey Gringo, does your 650-CSR have the stock sprockets? I've also got the 81 KZ650-CSR, which has a 13T front & a 33T rear - it seems like that would be a world of difference from some of the others having the 16T/42T setup. Another gear would be nice. JMK.
Sounds like your bike uses a 630 chain while the others use a 530 :)
KD9JUR

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  • 77KZ650
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Re: engine RPM's

14 Dec 2006 16:44
#99635
when my 77 was stock, it would be revving 5000 at 100km/h (about 60mph) 6000 rpm=120 km/h, 7000=140km/h ect...
Scott

Post edited by: 77KZ650, at: 2006/12/14 19:44
07 MDP Rookie of the Year
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Re: .

14 Dec 2006 18:02 - 03 Dec 2008 11:22
#99651
del
Last edit: 03 Dec 2008 11:22 by JMKZHI.

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  • steell
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Re: engine RPM's

15 Dec 2006 07:21
#99752
JMKZHI wrote:
By steell:
JMKZHI wrote:
Hey Gringo, does your 650-CSR have the stock sprockets? I've also got the 81 KZ650-CSR, which has a 13T front & a 33T rear - it seems like that would be a world of difference from some of the others having the 16T/42T setup. Another gear would be nice. JMK.
steell wrote:
Sounds like your bike uses a 630 chain while the others use a 530 :)
Yep, yer right about my chain; I don't know about the others. JMK.

I bet that your bike don't have a kickstart either :)

The 650 switched to a 630 chain, no kickstart, and a HyVo cam chain around 81, previous models had a kickstart, roller cam chain, and 530 chain. A 750 jug, pistons, and head, would bolt right on your bike :)
KD9JUR

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