Author Topic: What exhaust is this?  (Read 1401 times)

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Offline SHELLFISH

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What exhaust is this?
« on: March 29, 2010, 01:54:20 PM »
This 1976 550F is on e bay right now.
I don't recognize the exhaust.
Anybody have a clue?
It looks like the emblem says BC or RC?
I did a quick Google search and came up empty.
Thanks!
I want to die like my grandfather did...in his sleep and not screaming like the passengers in his car!

Offline wannabridin

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    • 1976 CB750K, under construction:
Re: What exhaust is this?
« Reply #1 on: March 29, 2010, 01:54:57 PM »
looks like an R.C. to me
1976 CB750K, currently under construction:
http://forums.sohc4.net/index.php?topic=64468.0

-And if you don't do it this year, you'll be one year older when you do...

Offline 78 k550

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Re: What exhaust is this?
« Reply #2 on: March 29, 2010, 01:59:47 PM »
not sure if he made exhaust but just found out from my cam RC can stand for Russ Collins.

Paul
Paul
Littleton, CO

76/77 CB 750F, 
75 GL1000, (AKA GL1-242 NGWClub),
76 GL1000 LTD
84 GL1200 Standard
6 Bultaco's= 42, 49, 121, 152, 167, 188

Offline Retro Rocket

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Re: What exhaust is this?
« Reply #3 on: March 29, 2010, 05:37:24 PM »
Yep, thats an RC pipe as well.

Mick
750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline PeWe

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Re: What exhaust is this?
« Reply #4 on: April 04, 2010, 05:48:48 AM »
This 1976 550F is on e bay right now.
I don't recognize the exhaust.
Anybody have a clue?
It looks like the emblem says BC or RC?
I did a quick Google search and came up empty.
Thanks!

It's a Russ Collins 4-1 as it is written on it.  
I had one on my bike 1979-1983 until I made a total overhaul including tuning the engine, replaced by an Alpha 4-1.  

Today plans of purchase a Carpy's Yoshi 4-1 replica with good clearance to ground and allow the engine to breath. I remember that Yoshi 4-1 was one of the best 4-1 out there in the beginning of the 80's. Russ Collins had a very bad clearance to ground. My exhaust became rather scratched after a while. My photos below are from July 1980 when it was popular to modify the bikes here with longer fork, banana seat, high steering rod and a nice sounding 4-1.
« Last Edit: April 04, 2010, 06:08:56 AM by PeWe »
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 PeWe

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Re: What exhaust is this?
« Reply #5 on: April 04, 2010, 06:23:52 AM »
not sure if he made exhaust but just found out from my cam RC can stand for Russ Collins.

Paul

RC cam profiles are still available for CB750 SOHC :-)
http://www.dynoman.net/bikepages/sohc/cams_dp.html

More info here: http://www.satanicmechanic.org/rccam.shtml
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