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Author Topic: Performance Cam for CB650?  (Read 1812 times)

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Offline SOHC4 Cafe Racer Fan

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Performance Cam for CB650?
« on: August 03, 2015, 08:27:01 PM »
Do any of the aftermarket cam manufacturers make higher performance cams for the 1979-1982 CB650???
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"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

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1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
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2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
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Offline Retro Rocket

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Re: Performance Cam for CB650?
« Reply #1 on: August 03, 2015, 10:29:24 PM »
It seems megacycle no longer make a cb650 cam, I imagine one of their 500/550 cams would probably work seeings though they are interchangeable...

http://www.megacyclecams.com/catalog/Page32.pdf
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Offline bwaller

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Re: Performance Cam for CB650?
« Reply #2 on: August 04, 2015, 05:13:26 AM »
I have a Web 58a in one street job my wife rides. It's a mild improvement, probably like a 650 cam?? Not sure about the 58b, it shows a little more duration and the same lift.

I think with your choice of pistons & compression the Megacycle 12620 will make you smile. That's the one I race with and in the smaller displacement and 29mm carbs it has a weak spot around 6K at WOT. In a larger engine with similar carbs it should work great. Don't even consider the MegaX6.
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Offline calj737

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Re: Performance Cam for CB650?
« Reply #3 on: August 04, 2015, 05:14:56 AM »
Ping Mr Rieck for your MegaCycle cam and rockers. I bet the grind on my 500 would be pretty yummy in that motor
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Offline SOHC4 Cafe Racer Fan

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Re: Performance Cam for CB650?
« Reply #4 on: August 04, 2015, 09:34:38 AM »
Thanks Brent and Cal.  I just sent MR an email asking for some of his sage advice.
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1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline SOHC4 Cafe Racer Fan

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Re: Performance Cam for CB650?
« Reply #5 on: August 04, 2015, 10:08:36 AM »
Quote from: Retro Rocket on August 03, 2015, 10:29:24 PM
It seems megacycle no longer make a cb650 cam, I imagine one of their 500/550 cams would probably work seeings though they are interchangeable...

http://www.megacyclecams.com/catalog/Page32.pdf

Thanks, Mick. 
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1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline cb650

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Re: Performance Cam for CB650?
« Reply #6 on: August 04, 2015, 12:37:25 PM »
Some one did make a hot 550 cam that had 1mm more lift than the 650.  But at the price I wasnt that curious.
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Offline SOHC4 Cafe Racer Fan

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Re: Performance Cam for CB650?
« Reply #7 on: August 04, 2015, 03:03:31 PM »
I just spoke with Mike.  He echoed Brent and Cal's advice.  Megacycle 126-20 cam and hardweld rockers.  I'm sending them to him early next week.  THANKS, MIKE!!
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1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold
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