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Author Topic: What does your tach read at 60mph?  (Read 5946 times)

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Offline IAmCitizenMe

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What does your tach read at 60mph?
« on: July 13, 2009, 05:31:22 PM »
I read posts all the time where people say they things like "I hit 80 in third gear"

I was wondering where people shift when they are cruising. I usually keep my tach at around 3,000 rpms. When I'm doing 60 (or 70, according to my spedometer) my rpms are around 6,000. Seems like if I went 80 in third, my engine would explode.

What are your thoughts?

(I found this video)
« Last Edit: July 13, 2009, 05:47:45 PM by IAmCitizenMe »
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Offline fmctm1sw

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Re: What does your tach read at 60mph?
« Reply #1 on: July 13, 2009, 05:47:43 PM »
350F - 6000RPM!
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Offline Industrial Cafe

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Re: What does your tach read at 60mph?
« Reply #2 on: July 13, 2009, 05:51:13 PM »
4000 rpms exactly. the prettiest rpm to be at. IMO

k1 bike
k8 motor
18/48 sprockets
5th gear
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Offline fmctm1sw

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Re: What does your tach read at 60mph?
« Reply #3 on: July 13, 2009, 05:54:13 PM »
Holy crap, I didn't know those bikes would hit 160 mph!    ::)
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Quote from: 754
Dude is that a tire ? or an O-ring..??

Quote from: inkscars
This is not a pod thread
This is not a #$%* on my vacuum gauges thread
This is a help or GTFO thread.

1973 CB350F
1973 CB350G
1975 CB550K
1983 GL650I
1973 CB750K3 (http://forums.sohc4.net/index.php?topic=92888.0)
1984 Kawasaki KLT-250 (AKA 3 wheeler of death)
1994 Honda TRX300
1999 Honda TRX250

Offline Industrial Cafe

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Re: What does your tach read at 60mph?
« Reply #4 on: July 13, 2009, 06:01:08 PM »
Quote from: IAmCitizenMe on July 13, 2009, 05:31:22 PM
I read posts all the time where people say they things like "I hit 80 in third gear"
my bike hits 80 in 3rd at around 7500rpms
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Offline Industrial Cafe

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Re: What does your tach read at 60mph?
« Reply #5 on: July 13, 2009, 06:02:47 PM »
also the guy in the video needs to clean and straighten his speedo cable/drive.
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Offline clarkjh

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Re: What does your tach read at 60mph?
« Reply #6 on: July 13, 2009, 06:16:01 PM »
The way my speedo and tach are I don't know.  60mph in 2nd gear (+ or - 10mph) is about 7500rpm (+ or - 2000rpm)
As you should be able to tell, my gauges are about ready to go on vacation.

James
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Offline Industrial Cafe

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Re: What does your tach read at 60mph?
« Reply #7 on: July 13, 2009, 06:19:46 PM »
that explains the km/h action in the video
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Offline IAmCitizenMe

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Re: What does your tach read at 60mph?
« Reply #8 on: July 13, 2009, 06:20:27 PM »
Do you guys cruise at those high rpms? If you're going 60 in third gear, do you hang out in third or do you shift up to fifth? Are there benefits?
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Offline B.O.X.N.I.F.E.

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Re: What does your tach read at 60mph?
« Reply #9 on: July 13, 2009, 06:21:26 PM »
Haha, didn't notice the km/h at first. The top of my head almost popped off!
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Offline Industrial Cafe

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Re: What does your tach read at 60mph?
« Reply #10 on: July 13, 2009, 06:22:38 PM »
I hang out in 5th

I like to keep the motor between 3500 and 5500rpms it seems to be nicer to the motor :-\ :)
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Offline Johnny5

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Re: What does your tach read at 60mph?
« Reply #11 on: July 13, 2009, 07:11:07 PM »
Quote from: Industrial Cafe on July 13, 2009, 06:22:38 PM
I hang out in 5th

I like to keep the motor between 3500 and 5500rpms it seems to be nicer to the motor :-\ :)


Agreed.

For cruising at 60mph, my engine is churning at around 4,400 rpm. CB750k7 with 17 front sprocket, 48 rear in 5th gear.

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Offline my78k

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Re: What does your tach read at 60mph?
« Reply #12 on: July 13, 2009, 08:15:17 PM »
Well I can hit 60MPH in first gear on the CBR....but for cruising I wouldn't recommend it!

Dennis
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Offline Johnie

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Re: What does your tach read at 60mph?
« Reply #13 on: July 13, 2009, 08:21:59 PM »
K1 easy to remember:
60MPH, 5th gear, 4,000 RPM.  Smooth as my wifes butt!!!   ;D
Man those HM300's sound nice at that speed.
« Last Edit: July 17, 2009, 06:49:37 AM by Johnie »
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Offline Spanner 1

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Re: What does your tach read at 60mph?
« Reply #14 on: July 13, 2009, 08:26:01 PM »
Damn it Johnie, you covered  feel, hear and see...the 3 bases !!!
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Offline mgbgt89

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Re: What does your tach read at 60mph?
« Reply #15 on: July 13, 2009, 08:34:28 PM »
Speedo cable is broken right now.. All i know is 75 on the interstate is about 6500.
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Offline andy750

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Re: What does your tach read at 60mph?
« Reply #16 on: July 13, 2009, 08:36:02 PM »
CB750K2 or CB750K4, 60mph, 4000 rpm.

CB750K4 -Cruising at 85mph, 5800 -6000 rpm, 5th gear, 18/48, stock pipes etc. Did this riding from Boston, MA to Mid-Ohio last year.

CB750K4 - 100-110 mph, 7000rpm(?maybe?), a couple of hours on the Autobahn heading to Munich, hanging on for dear life and hoping I dont have to brake suddenly  ;D

cheers
Andy

 
« Last Edit: July 13, 2009, 08:38:11 PM by andy750 »
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Offline the technological J

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Re: What does your tach read at 60mph?
« Reply #17 on: July 13, 2009, 09:16:31 PM »
how high should u let the rpms go before shifting? is it bad to shift just before the redline? compared to the video? i can hit 95 mph in third at 9000.... but 60 in fifth is around 4, 4 and ahalf
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Offline Industrial Cafe

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Re: What does your tach read at 60mph?
« Reply #18 on: July 13, 2009, 09:25:43 PM »
I shift at 6000 normally, unless I'm passing, or having fun. then it's 9000rpm
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Offline Spanner 1

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Re: What does your tach read at 60mph?
« Reply #19 on: July 13, 2009, 11:21:21 PM »
Us old farts say waaaaay too much rpm on our old bikes past 5 or 6k rpm, or do I speak for my sad, old self..... ( get a crotch rocket )..!!
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Offline volkswagendan

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Re: What does your tach read at 60mph?
« Reply #20 on: July 14, 2009, 04:23:03 AM »
my tach blew off at 130. havent seen it seance.
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Offline Johnie

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Re: What does your tach read at 60mph?
« Reply #21 on: July 14, 2009, 05:43:16 AM »
Quote from: Spanner 1 on July 13, 2009, 11:21:21 PM
Us old farts say waaaaay too much rpm on our old bikes past 5 or 6k rpm, or do I speak for my sad, old self..... ( get a crotch rocket )..!!
Yup...I agree on the high RPM's spanner.  I usually shift between 4 - 5.  No need to put my investment through unusual high stess... ::)
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Offline BeSeeingYou

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Re: What does your tach read at 60mph?
« Reply #22 on: July 16, 2009, 10:27:35 PM »
Quote from: Spanner 1 on July 13, 2009, 11:21:21 PM
Us old farts say waaaaay too much rpm on our old bikes past 5 or 6k rpm, or do I speak for my sad, old self..... ( get a crotch rocket )..!!

  Me too spanner.  I usually shift somewhere between 3000-5000 rpm though once in awhile I will "run it up".

On my 76F1 it's 4000rpm at 55mph, 4500rpm at 60mph, and 5000rpm at 65mph.  Stock set up.
« Last Edit: July 16, 2009, 10:29:34 PM by srust58 »
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Offline my78k

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Re: What does your tach read at 60mph?
« Reply #23 on: July 17, 2009, 07:02:29 AM »
These I-4's are meant to be revved up a wee bit. Heck they would barely stay charged if you guys keep the RPM's that low.

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Offline flybox1

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Re: What does your tach read at 60mph?
« Reply #24 on: July 17, 2009, 08:04:31 AM »
Quote from: fmctm1sw on July 13, 2009, 05:47:43 PM
350F - 6000RPM!

+1...and how sweet the sound out of those 4into2 Jardines.
I spend very little ride time, maybe 10%, above 60 on this old bike.
I shift around 6500rpm, cruise ~5500rpm.
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