7500 rpm's at 65 mph is this normal ?

mcintyreruss
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7500 rpm's at 65 mph is this normal ?

30 Sep 2007 10:19

#173697

i found a 13,14,15,16 front and 38,40,42 rear sprocket which ratio is best to fix my problem, oem is 16/38 ratio

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modprod
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Re: 7500 rpm's at 65 mph is this normal ?

30 Sep 2007 10:32

#173701

mcintyreruss wrote:

i found a 13,14,15,16 front and 38,40,42 rear sprocket which ratio is best to fix my problem, oem is 16/38 ratio

Of all the sprockets you list the 16/38 would be of course be the lowest "numerical" ratio and would give the lowest rpm at a given speed but I ask what bike? 7500 @65 sounds like a little bike? Is this in high gear?

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mcintyreruss
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Re: 7500 rpm's at 65 mph is this normal ?

30 Sep 2007 10:34

#173702

81 kz550 ltd, in 6th gear, rpm's will drop some when i hit about 80 to 85 when i get on the throttle hard

Post edited by: mcintyreruss, at: 2007/09/30 13:38

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guitargeek
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Re: 7500 rpm's at 65 mph is this normal ?

30 Sep 2007 10:47

#173704

mcintyreruss wrote:

rpm's will drop some when i hit about 80 to 85 when i get on the throttle hard

Engine revs go lower as your speed goes higher? Sounds to me like you have other problems...

1980 KZ750-H1 (slightly altered)
1987 KZ1000-P6 "Ponch"
1979 GS1000 "Dadzuki"

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mcintyreruss
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Re: 7500 rpm's at 65 mph is this normal ?

30 Sep 2007 12:04

#173729

the ratio on the bike is 16/38 now, anybody got an idea of what can cause the rpms to be 7500 at 65 mph in top gear?

Post edited by: mcintyreruss, at: 2007/09/30 15:08

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810gpz750
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Re: 7500 rpm's at 65 mph is this normal ?

30 Sep 2007 13:57

#173751

reasons for high rpm. (1) clutch slipping (2) are the wheels and tires stock(if you have a smaller tire and wheel combo rpm's go up bigger rpm's go down) (3) is you speedometer right?

your rpm's going down as you go faster? thats odd it makes me think clutch slippage, but the clutch normally slips more with more throttle and also the faster you go. sounds like VOODOO to me :woohoo: :evil: :woohoo:

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flht1997
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Re: 7500 rpm's at 65 mph is this normal ?

30 Sep 2007 14:58

#173758

messed up tach?

Matt Milwaukee, WI
75' KZ400, (5) 78' KZ400, 76' KZ 750, 78' KZ650
78'CB750F, 78' CB550K
89' BMW R100RT
05' H-D Electra Glide
06' KLR650
Do it right or don't bother doing it at all.

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mcintyreruss
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Re: 7500 rpm's at 65 mph is this normal ?

30 Sep 2007 15:38

#173765

speedometer is okay, everything on bike is stock, engine rev sounds right with tach read out, any other thoughts. how do you check clutch slippage?

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810gpz750
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Re: 7500 rpm's at 65 mph is this normal ?

30 Sep 2007 16:36

#173771

the best way to tell if your clutch is slipping. in 2nd or 3rd get the bike up to around 4,000rpm and go wide open throttle. if your clutch is slipping the tach will jump up in rpm's but you wont speed up. if the clutch is good the tach and speedo will climb toghether. hope this helps a slipping clutch is pretty easy to diagnose.

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mcintyreruss
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Re: 7500 rpm's at 65 mph is this normal ?

30 Sep 2007 16:43

#173776

i think this is my problem. how do you fix a slipping clutch?

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810gpz750
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Re: 7500 rpm's at 65 mph is this normal ?

30 Sep 2007 16:51

#173777

oh yeah forgot to say my clutch was slipping a while back above 8,000rpm. it was due to worn springs replaced em' with the "red springs". a little harder to pull the clutch in but its worth it.

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mcintyreruss
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Re: 7500 rpm's at 65 mph is this normal ?

30 Sep 2007 16:53

#173779

thanks i try that

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