CBR 600F2 1991 - 1994 CBR 600F2

Safe Crusing RPM?

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Old Jul 8, 2010 | 10:21 PM
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super60daytona's Avatar
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Default Safe Crusing RPM?

I bought an F2 this spring and it is definitely re-geared. I am wondering how high up in the revs this motor is safe to cruise at for long durations (over an hour at constant(ish) RPM). I have large hills to go up and down everyday similar to San Fransisco, and some nice stretches of twisty road to really twist it up in so I enjoy the extra grunt.

I LOVE how this thing pulls. Pulled my 93 against a 2009 R6 and he stood no chance, I was faster to 60 by a bit and blew him out of the water to 100 (was just a dot in the mirror, he said he was on it full kill) and I'm a 280LB fatty.

I reline in 6th at ~157MPH and find myself flowing with traffic at ~8,000RPM's. The rear is a 45 tooth, been too lazy / busy to pull the cover and check the front gear. I'm also only getting in the mid 30's for fuel mileage, is this a result of the re-gearing or is this fairly normal? The R6 owner stated he gets around 53MPG with his tall geared, fuel injected, new bike.

Thanks for your thoughts,
Harold
 
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Old Jul 9, 2010 | 12:25 AM
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keep it below 14,000 cruising rpm
 
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Old Jul 11, 2010 | 01:07 PM
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i have stock gearing and i usually get somewhere around 35-40 mpg and i normally cruise at about 4-7k and shift anywhere between 7500 and up depending on how fast i wanna get up to speed
 
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Old Jul 13, 2010 | 04:10 PM
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I have stock gearing I redline around 145 (or so I hear) and I cruise in 6th at 75mph at 6,000 RPM's at 80mph its about 6150 or so

Before I got a new chain the old one was soooo stretched, I was running about 7500 rpm at 80mph!
 
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Old Jul 13, 2010 | 09:00 PM
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my 93 is stock gearing to my knowledge and 65mph is 5500rpms in 6th. i dunno my 6th gear redline speed tho, i hit 140 and still had plenty left.

yea i forgot to say my mpg is around 46 for traveling. so less for city driving
 

Last edited by psx2rulz; Jul 14, 2010 at 03:06 AM.
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Old Jul 13, 2010 | 10:33 PM
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Stock 94, at 100 kph (60mph) I'm at 5000 RPM. At 120 kph (75mph) I'm at 6000 RPM in 6th gear. My gas mileage is 5.3 L/100klm (44.3 Mpg) highway.
 

Last edited by pt40fathoms; Jul 13, 2010 at 10:36 PM.
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Old Jul 14, 2010 | 03:12 AM
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There is no way in hell you're re-geared AND peaking out at 157mph. The bikes top speed with stock gearing is 150mph, which given a 5% speedo-error would amount to 157.5mph indicated at top speed. Adjusting your gearing will reduce this top speed, so if the gearing is even at all off from stock, you wouldn't be getting those numbers.

I've been as close as I care to get to topping out, and I hit an indicated 145 at 12k RPM, and again the gauges are off. I'm also +2 in the rear.
 
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Old Jul 14, 2010 | 06:17 PM
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so your telling me that your modded f2 is faster (0 - 100) than a 2009 r6? , is it true guys?
i'll trade my f3 with ur f2 lol

Originally Posted by super60daytona
I bought an F2 this spring and it is definitely re-geared. I am wondering how high up in the revs this motor is safe to cruise at for long durations (over an hour at constant(ish) RPM). I have large hills to go up and down everyday similar to San Fransisco, and some nice stretches of twisty road to really twist it up in so I enjoy the extra grunt.

I LOVE how this thing pulls. Pulled my 93 against a 2009 R6 and he stood no chance, I was faster to 60 by a bit and blew him out of the water to 100 (was just a dot in the mirror, he said he was on it full kill) and I'm a 280LB fatty.

I reline in 6th at ~157MPH and find myself flowing with traffic at ~8,000RPM's. The rear is a 45 tooth, been too lazy / busy to pull the cover and check the front gear. I'm also only getting in the mid 30's for fuel mileage, is this a result of the re-gearing or is this fairly normal? The R6 owner stated he gets around 53MPG with his tall geared, fuel injected, new bike.

Thanks for your thoughts,
Harold
 
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Old Jul 14, 2010 | 06:36 PM
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His friend probably has something wrong with the bike, is afraid of high RPM's, or is a woman


Just kidding... at least about the woman part. There's no way in hell this bike holds a candle to a brand new R6, espescially with stock gearing, and espescially from 60mph-100 when regeared heavily.
 
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Old Jul 14, 2010 | 11:46 PM
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I raced a newer gixxer 750 and he gave me about 3 bike lengths lead. We did a roll on in first gear and by the time I shifted to second, he had 7 bikes on me at least.
 
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