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Author Topic: 73 CB 500 Engine Surge  (Read 651 times)

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Offline toobad

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73 CB 500 Engine Surge
« on: August 11, 2015, 08:34:03 PM »
I have a 73 CB500 K2 which until up to this point was running perfectly.  About two weeks ago when shifting between gears, I noticed a quick surge in RPMs.  It only lasts about a 1/10Th of a second and then quits - resuming to a smooth operation.  I didn't think too much about it then but it is now occurring about once a ride.  I am thinking it is a carb issue and needs to be resync'd or maybe a piece of debris in one of the jets. Has anyone experienced this issue and what did you do to resolve?  Thanks for your assistance.
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Offline PeWe

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Re: 73 CB 500 Engine Surge
« Reply #1 on: August 11, 2015, 10:20:18 PM »
Have you read this? The Thoughts of Hondaman. / Dealing with the 500/550 "flat spot"
http://forums.sohc4.net/index.php/topic,7401.msg67251.html#msg67251
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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 toobad

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Re: 73 CB 500 Engine Surge
« Reply #2 on: August 12, 2015, 02:02:00 PM »
Good point!  I will check it out.  Thanks for your comment.
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