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Author Topic: would you put in a big bore kit and a hot cam if you had the chance?  (Read 13297 times)

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Offline b5rider

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Re: would you put in a big bore kit and a hot cam if you had the chance?
« Reply #75 on: May 30, 2015, 07:21:45 AM »
I'll try to have a video up today
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1984 Honda Elite 150
1998 Yamaha 650
2004 Honda 750 ACE
1975 CB550
1978 CB400A
1978 CB550 now 603cc w/sidecar

The key to life is to make sure the line to put flowers on your grave is longer than the one to piss on it.

Offline Tews19

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Re: would you put in a big bore kit and a hot cam if you had the chance?
« Reply #76 on: May 30, 2015, 07:30:24 AM »
Awesome! Is it tuned? If so what's your carb settings?
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1970 Honda CB750 survivor.

Offline b5rider

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Re: would you put in a big bore kit and a hot cam if you had the chance?
« Reply #77 on: May 30, 2015, 07:33:09 AM »
Quote from: Tews19 on May 30, 2015, 07:30:24 AM
Awesome! Is it tuned? If so what's your carb settings?
I'll ask today.  Andrew pulled the plugs after the test drive and he said it is perfect
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1984 Honda Elite 150
1998 Yamaha 650
2004 Honda 750 ACE
1975 CB550
1978 CB400A
1978 CB550 now 603cc w/sidecar

The key to life is to make sure the line to put flowers on your grave is longer than the one to piss on it.

Offline b5rider

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Re: would you put in a big bore kit and a hot cam if you had the chance?
« Reply #78 on: June 01, 2015, 12:57:05 PM »
My mechanic stated the 603cc kit with the 650 cam in my 550 pulls as hard as the 650 in his shop.  The midrange power is definitely more noticeable. It's not a subtle cruiser anymore... Until I put the sidecar back on. 
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1984 Honda Elite 150
1998 Yamaha 650
2004 Honda 750 ACE
1975 CB550
1978 CB400A
1978 CB550 now 603cc w/sidecar

The key to life is to make sure the line to put flowers on your grave is longer than the one to piss on it.

Offline Tews19

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Re: would you put in a big bore kit and a hot cam if you had the chance?
« Reply #79 on: June 01, 2015, 01:10:56 PM »
Awesome. Were you able to get the Carb settings?
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1969 Honda CB750... Basket case
1970 Honda CB750 survivor.

Offline b5rider

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Re: would you put in a big bore kit and a hot cam if you had the chance?
« Reply #80 on: June 01, 2015, 01:20:46 PM »
As soon as I get the idle to not hang
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1984 Honda Elite 150
1998 Yamaha 650
2004 Honda 750 ACE
1975 CB550
1978 CB400A
1978 CB550 now 603cc w/sidecar

The key to life is to make sure the line to put flowers on your grave is longer than the one to piss on it.

Offline Tews19

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Re: would you put in a big bore kit and a hot cam if you had the chance?
« Reply #81 on: June 01, 2015, 02:32:57 PM »
Hanging idle? Wd-40 spray the boots. See if it increases. If it does you have a leak.
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1969 Honda CB750... Basket case
1970 Honda CB750 survivor.

Offline b5rider

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Re: would you put in a big bore kit and a hot cam if you had the chance?
« Reply #82 on: June 01, 2015, 02:36:10 PM »
Tried that.  No change.  I'll post a dedicated thread soon with all the particulars
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1984 Honda Elite 150
1998 Yamaha 650
2004 Honda 750 ACE
1975 CB550
1978 CB400A
1978 CB550 now 603cc w/sidecar

The key to life is to make sure the line to put flowers on your grave is longer than the one to piss on it.

Offline b5rider

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Re: would you put in a big bore kit and a hot cam if you had the chance?
« Reply #83 on: June 01, 2015, 03:19:27 PM »
I've only been on 2 550s. One had 24k miles and the other was in need of a rebuild,  so my review is very subjective
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1984 Honda Elite 150
1998 Yamaha 650
2004 Honda 750 ACE
1975 CB550
1978 CB400A
1978 CB550 now 603cc w/sidecar

The key to life is to make sure the line to put flowers on your grave is longer than the one to piss on it.

Offline b5rider

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Re: would you put in a big bore kit and a hot cam if you had the chance?
« Reply #84 on: January 06, 2016, 07:23:54 AM »
Just a short update on the build.
I replaced the carbs with some older ones (with 105 mains) because the PD carbs were not able to be tuned to my liking. The older carbs worked great out of the box.
I pulled the plugs after some 20 miles, and they all look good; no soot or white chalk, just some nice tan color
I broke the engine in with the sidecar in place because I let my M1 permit lapse and you don't need a motorcycle license to ride a 3-wheeled vehicle in California.
The bike pulls hard in the midrange and has no flat spots during acceleration.

Only issue I've noticed is it gets very hot during freeway rides. I think it's a combination of the big bore kit and the extra load from the sidecar.
I will add an oil cooler with a built-in thermostat as soon as I can find a location for it as the sidecar mounts are in the way.

I have had a few issues with oil leaks from the tach gear, rocker covers, oil pan, and shifter shaft. Most of those have been resolved except the tach gear (started another thread)

Anyhow, I am really enjoying the extra power and would recommend the upgrade to anyone with a 550.
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1984 Honda Elite 150
1998 Yamaha 650
2004 Honda 750 ACE
1975 CB550
1978 CB400A
1978 CB550 now 603cc w/sidecar

The key to life is to make sure the line to put flowers on your grave is longer than the one to piss on it.

Offline flatlander

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Re: would you put in a big bore kit and a hot cam if you had the chance?
« Reply #85 on: January 06, 2016, 08:03:18 AM »
are you going to dyno it? if so, please post results.
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Offline b5rider

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Re: would you put in a big bore kit and a hot cam if you had the chance?
« Reply #86 on: January 06, 2016, 08:26:57 AM »
Unfortunately, I don't have any free access to a dyno, so I'm using my carefully calibrated butt dyno.
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1984 Honda Elite 150
1998 Yamaha 650
2004 Honda 750 ACE
1975 CB550
1978 CB400A
1978 CB550 now 603cc w/sidecar

The key to life is to make sure the line to put flowers on your grave is longer than the one to piss on it.

Offline Jerry Rxman Griffin aka MuthaF'er

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Re: would you put in a big bore kit and a hot cam if you had the chance?
« Reply #87 on: January 06, 2016, 12:57:51 PM »
If it's getting hot you may want to take the time to increase your jetting and see what the plugs look like and what the AnalDyno says.
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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 PeWe

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Re: would you put in a big bore kit and a hot cam if you had the chance?
« Reply #88 on: January 06, 2016, 01:55:16 PM »
Quote from: Jerry Rxman Griffin aka MuthaF'er on January 06, 2016, 12:57:51 PM
If it's getting hot you may want to take the time to increase your jetting and see what the plugs look like and what the AnalDyno says.
+1
I had similar experience with my bike. I could do richer and solved a heating engine and got better throttle responce too.
EDIT: Check pilot jets by only drive in lower speed, low throttle lift. It is easy to miss lean pilot jet if mostly driving full throttle as the dyno guys usually do.
« Last Edit: January 06, 2016, 02:00:05 PM by PeWe »
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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 b5rider

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Re: would you put in a big bore kit and a hot cam if you had the chance?
« Reply #89 on: January 06, 2016, 02:43:45 PM »
Thanks.  Most,  if not all,  of my driving is below WOT

Sent from my SAMSUNG-SM-N920A using Tapatalk

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1984 Honda Elite 150
1998 Yamaha 650
2004 Honda 750 ACE
1975 CB550
1978 CB400A
1978 CB550 now 603cc w/sidecar

The key to life is to make sure the line to put flowers on your grave is longer than the one to piss on it.
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