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Author Topic: What's Missing?  (Read 547 times)

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Offline Vintageguy

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What's Missing?
« on: June 03, 2023, 07:28:47 AM »
Rode my 750F today and lost concentration for a instant. Missed a shift up to about 4,000 rpm. Think I did anything harmful? No noises or issues of note. Thanks.
« Last Edit: June 03, 2023, 07:33:16 AM by Vintageguy »
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Offline bryanj

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Re: What's Missing?
« Reply #1 on: June 03, 2023, 07:33:47 AM »
As the rev to over 7 probably not, unless you meant 14
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Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

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Offline newday777

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Re: What's Missing?
« Reply #2 on: June 03, 2023, 08:33:56 AM »
Quote from: Vintageguy on June 03, 2023, 07:28:47 AM
Rode my 750F today and lost concentration for a instant. Missed a shift up to about 4,000 rpm. Think I did anything harmful? No noises or issues of note. Thanks.
4,000 rpm? Nope.
Ride on and think about shifting full shifts up or down every shift so it goes fully into the gear so you don't wear the shift dogs and cogs.
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Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline Rosinante

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Re: What's Missing?
« Reply #3 on: June 03, 2023, 10:37:30 AM »
If you are keeping RPMs under 4000, then you are riding your bike wrong.  ;)
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1978 CB750K

Offline PeWe

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Re: What's Missing?
« Reply #4 on: June 03, 2023, 11:07:20 AM »
It start to live AFTER  5000rpm.
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CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline Jerry Rxman Griffin aka MuthaF'er

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Re: What's Missing?
« Reply #5 on: June 03, 2023, 01:31:40 PM »
Not unless it ran up to 10-12,000 rpm like I did at WFO 1 to 2 shift. Obliteration ensued.
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As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline Shtonecb500

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Re: What's Missing?
« Reply #6 on: June 03, 2023, 08:21:05 PM »
for my city riding and how loud my pipe is, I shift around 4k all day, my motor really wakes up around 6-7k...I should probably get a quieter pipe.
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73/74'' CB500/550 resto-mod - sold
75' 750f 91' cbr f2 swap cafe - mock up
74' 750 chopper hardtail - complete - sold
74' CB750/836kit - Black mix & match - daily rider - always tweaking
71' cb500 K0 survivor - complete
71' K1 - CANDY GOLD/BROWN Winton kit - in process

Offline Vintageguy

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Re: What's Missing?
« Reply #7 on: June 05, 2023, 09:34:56 AM »
I read somewhere that high revs were not particularly good for 78F's due to increased included valve angle. Could I really safely take my 45 year old Honda up to 6-7000? Thanks.
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Offline Alan F.

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Re: What's Missing?
« Reply #8 on: June 05, 2023, 12:04:52 PM »
You didn't read that here. Reddit maybe?
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