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Author Topic: How fast will my cb650 be?  (Read 10929 times)

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Offline coldwave007

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Re: How fast will my cb650 be?
« Reply #25 on: October 03, 2011, 10:10:05 AM »
I've got an 80 CB650 with the PD carbs.  Bike ran like crap until I got it to stock with airbox, filter, carb sync, and proper jetting.  First time I took her out the front tire about came up!  I've had her to the ton a couple of times and she still had more left in her.  I just didn't want to push it any further.

So will a cb650 go fast?  Yup.  They just have to be set up right.
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Offline TwoTired

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Re: How fast will my cb650 be?
« Reply #26 on: October 03, 2011, 10:32:19 AM »
Quote from: cb650 on October 03, 2011, 09:04:30 AM
Acually TT is wrong.
Ain't me babe.  It's you calling Motorcyclist Magazine a liar.

Quote from: cb650 on October 03, 2011, 09:04:30 AM
the 79 ran the 1/4 mile in 12.99 so goes a old report.  And honda claimed 63 hp. 
Where, at the Crankshaft? ...or the Rear wheel where it is actually measurable?

Quote from: cb650 on October 03, 2011, 09:04:30 AM
In 80 with the style change and gearing they slowed to 13.3.
Maybe Motorcyclist mag didn't use sea level on a cold day, a 90# pro-rider, and a Dyno calibrated in the bike's favor?

Reminds me of the old "Magazine Wars", competing for advertising dollars.  ::)
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Offline cb650

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Re: How fast will my cb650 be?
« Reply #27 on: October 03, 2011, 12:00:43 PM »
Cycle (jan 79) test of the 79 shows 12.99.   And they do show 50 hp at the rear.  I'm sure honda did it at the crank. So I'm sure it is more than 50. There is a lo po version that went to germany. Had a smaller profile cam in it.   And it is referred to as a 50hp cam. Also said the latter models did run slower.  Have a Motorcyclist (feb 82) testing the nitehawk and it runs 13.29.  It was generally the worst performer of all the bikes they listed.  I did also state I didnt believe the numbers but was stating what is written.  Isnt that what engineers do?    ;D
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Offline ABikeNamedTrouble

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Re: How fast will my cb650 be?
« Reply #28 on: October 03, 2011, 01:29:16 PM »
Quote from: buffaloejon on October 03, 2011, 09:16:58 AM
Like I've always heard, it'll go fast enough to kill you. But in all seriousness, it will go fast enough to scare you, so why go any faster? I don't give a toot about a motorcycle that can break 200 mph, cause who has the need to go that fast? Not even professional racers! So why the need for more hp, when the huge majority of street riders won't need it? I would think if you have to ask, it'll probably go fast enough for you.
Nonsense.  My 650 isn't fast enough for me.  I NEED a 200hp V-Max to get to work in the morning.  Don't you??   ;)
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- Adam

1980 CB650c Custom
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Offline Hush

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Re: How fast will my cb650 be?
« Reply #29 on: October 03, 2011, 01:53:57 PM »
SRUST58 that spare tyre is for emergencies and I'm sitting on the junk in the trunk. ;D
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Offline Danno

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Re: How fast will my cb650 be?
« Reply #30 on: October 03, 2011, 08:40:47 PM »
sorry nate your question led me to believe you were a kid the track is definately the right place to do that
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Offline nate sere

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Re: How fast will my cb650 be?
« Reply #31 on: October 03, 2011, 08:54:28 PM »
I am a 36 year old kid.  The bike is all put together and fired right up.  It is loud and sounds very angry!  It sure sounds fast!  I need to do a few things still before I can ride it, but should have it out in a few days.   
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Offline phil71

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Re: How fast will my cb650 be?
« Reply #32 on: October 03, 2011, 11:52:09 PM »
that bike, as shown, looks like a free vasectomy.
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Offline TrueSpin

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Re: How fast will my cb650 be?
« Reply #33 on: October 04, 2011, 05:23:24 AM »
For what it's worth, my 750F is faster than a Shadow 1100ACE. At least to around 70mph.
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Offline ABikeNamedTrouble

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Re: How fast will my cb650 be?
« Reply #34 on: October 04, 2011, 10:47:28 AM »
Quote from: phil71 on October 03, 2011, 11:52:09 PM
that bike, as shown, looks like a free vasectomy.

agreed!
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- Adam

1980 CB650c Custom
Keihin PD mechanical carbs
Stock air box and 4-4 exhaust
http://forums.sohc4.net/index.php?topic=97504.0

Offline RustyStuff

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Re: How fast will my cb650 be?
« Reply #35 on: October 04, 2011, 01:35:10 PM »
Quote from: phil71 on October 03, 2011, 11:52:09 PM
that bike, as shown, looks like a free vasectomy.

 ???

Might wants some earplugs. mabey Pre order your hearing aids??
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'80 CB650

Offline nate sere

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Re: How fast will my cb650 be?
« Reply #36 on: October 04, 2011, 01:49:01 PM »
I plan to ride fast enough that the sound cant keep up.....
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Offline cb650

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Re: How fast will my cb650 be?
« Reply #37 on: October 04, 2011, 04:14:53 PM »
I'm thinking of changing my headers and going with one open.  Just a turnout.  Neighbors are a$$holes with the thumpin #$%* and barking wastes of dog flesh so piss on them.
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Offline nate sere

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Re: How fast will my cb650 be?
« Reply #38 on: October 04, 2011, 09:50:44 PM »
fixed the seat pan.....
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Offline lrutt

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Re: How fast will my cb650 be?
« Reply #39 on: October 05, 2011, 06:16:28 AM »
I don't know how many times I've heard people say one of these SOHC bikes brought the front end right up in the air.

I've been riding these things for almost 40 years and you have to really try to get air under that front tire. It sure as hell doesn't happen by accident unless you've pinned the throttle and your hand slips off the clutch.
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Offline Retro Rocket

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Re: How fast will my cb650 be?
« Reply #40 on: October 05, 2011, 11:51:24 PM »
Quote from: lrutt on October 05, 2011, 06:16:28 AM
I don't know how many times I've heard people say one of these SOHC bikes brought the front end right up in the air.

I've been riding these things for almost 40 years and you have to really try to get air under that front tire. It sure as hell doesn't happen by accident unless you've pinned the throttle and your hand slips off the clutch.

+1    These bikes are quite hard to wheelstand even if you know how, they have a really high balance point and need piles of revs to get them there. Unless they have a lot of engine work they will NEVER power stand....
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Offline scunny

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Re: How fast will my cb650 be?
« Reply #41 on: October 06, 2011, 03:21:35 AM »
bikey will skip front wheel in hard acceleration 1st gear, kissing the sky with front end requires dumping the last bit of the clutch. I don't bounce as good as I used to so don't do it often.  :D
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Offline d1000rr

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How fast will my cb650 be?
« Reply #42 on: October 06, 2011, 05:09:27 AM »
You bought the wrong but if you want to be "fast".
On a side note... I think your bike looks pretty cool :D
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Offline nate sere

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Re: How fast will my cb650 be?
« Reply #43 on: October 06, 2011, 07:06:14 AM »
i'm not so much looking for "fast" as I am respectable.   
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Offline Goldbug

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Re: How fast will my cb650 be?
« Reply #44 on: October 06, 2011, 07:57:01 AM »
If you want to be fast on an old bike get a 2-stroke widow maker. Powerband like a light switch, no suspension or brakes to speak of and an oscillating frame.
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