Author Topic: 1975 cb550 k , will the same year 550 f 4 into 1 pipes Fit the k? (Read 3420 times)

shaprok7 · « **on:** February 08, 2009, 05:48:33 PM »

I have a 1975 cb550 k , will any of the 550 f, 4 into 1 pipes Fit the k? If so do i need to changes the jets for this???

TwoTired · « **Reply #1 on:** February 08, 2009, 06:13:57 PM »

The jetting and carb settings are different between the two models. There is a chart in the carb FAQ that shows this.

There are also differences in the frame, the kick starter and foot pegs to accommodate all the pipes on one side of the bike.

Not saying it can't be done. But, you'll have to be more creative than just using nuts and bolts.

Cheers,

Edit: I forgot about the brake pedals being different, and the frame features that allow it's operation to clear the muffler and 4 pipes on one side.

NickC · « **Reply #2 on:** February 08, 2009, 07:09:57 PM »

I can answer the fitment problem. It will be right up against your rear brake peg. you will have to do some creative heating/bending to clear it.

shaprok7 · « **Reply #3 on:** February 08, 2009, 07:13:53 PM »

If anyone has done this it would be great to get a few tips. I just like look much better not afraid to put in some work!

thanks
shane

shaprok7 · « **Reply #4 on:** February 09, 2009, 10:22:07 AM »

NickC · « **Reply #5 on:** February 09, 2009, 11:10:58 AM »

What I did was bolt the pipes up, used an oxy- torch to heat up the pipes nice and red, put a breaker bar into the end and bend as needed. I can stand on the brake as hard as I can now, and it barely contacts the exhaust. This bend does create a kind of akward position for a muffler, so I am going to have the muffler shop bend an additional piece to create an "upswept" position for the muffler.

shaprok7 · « **Reply #6 on:** February 09, 2009, 11:35:43 AM »

thanks nick, do you have a pic , where does the pipe meet the peg on the single tubes or after they go into one?

NickC · « **Reply #7 on:** February 09, 2009, 12:03:25 PM »

I'll see if i can snap a pic this afternoon. I am ALMOST certain the pipes are off an F bike, but not 100%.
The brake hits a few inches before the pipes meet at the collector.

pablo78cb550 · « **Reply #8 on:** February 09, 2009, 01:11:18 PM »

i have the F brake arm and F fold able foot peg if you are interested.

NickC · « **Reply #9 on:** February 09, 2009, 03:46:48 PM »

Pablo,
Do you happen to have a closeup of the F bike in that area? I need to compare a few things

pablo78cb550 · « **Reply #10 on:** February 09, 2009, 04:38:03 PM »

That's actually a78 CB550 K.
I thought i'd need the f models brake arm to clear the 4 into 1 exhaust, i was misinformed.
so i do not need the pieces.
But here is a bigger pic.

shaprok7 · « **Reply #11 on:** February 09, 2009, 04:49:16 PM »

Pablo, bike looks sweet where did you get the exhaust? Has anyone put on the Mac
4 into 1 on a 550k wanted to know how the clearnce is. http://www.macperformance.com/???

pablo78cb550 · « **Reply #12 on:** February 09, 2009, 04:56:19 PM »

loudfastugly.com
but he's out of these now.
but i see them pop up on ebay every once in awhile.

fastbroshi · « **Reply #13 on:** February 09, 2009, 06:07:20 PM »

Keep in mind, that's not a Honda 550F 4-1. This is.

NickC · « **Reply #14 on:** February 09, 2009, 07:06:02 PM »

Thanks broshi. I can see now the difference in the brake placement. I'll see if i can get a pic so other can see

shaprok7 · « **Reply #15 on:** February 10, 2009, 10:08:30 AM »

NickC · « **Reply #16 on:** February 10, 2009, 04:21:46 PM »

It appears the F brake pedal comes much further out from the frame vs. the K. There is no way the exhaust would fit between the frame and brake like the F

fastbroshi · « **Reply #17 on:** February 10, 2009, 04:31:45 PM »

Yes that's exactly right, you'd need the F brake pedal and shaft assembly. But you'll probably run into fitment issues as the K frame doesn't have the tang to hold the spring that keeps the pedal up. You'll see mine doesn't have this as well. I've compared to my F frame and this tang is on an integral part of the frame that the splined brake shaft rotates in.

shaprok7 · « **Reply #18 on:** February 11, 2009, 07:26:25 PM »

thanks nick
the old man is a machinist we can make something now to find a cheep 4 into 1!!!!!!

TwoTired · « **Reply #19 on:** February 11, 2009, 08:17:47 PM »

As I understood it, all the after market 4 into 1s were made to fit onto either the F or K models. It's only Honda's F model header/muffler that requires the F model bits (pegs, brake lever, kick start) so it will still tuck next to the frame.

I'm afraid Nick's setup isn't going to fare well while canyon carving in right hand turns.

Cheers,

Derby City · « **Reply #20 on:** February 12, 2009, 03:37:50 PM »

I can't help you with your question, but if the pipes you're taking off the bike are in decent shape, I'd be interested in possibly purchasing them from you.

L.A. Nomad........ · « **Reply #21 on:** February 13, 2009, 11:29:41 AM »

Rearsets would solve all these problems.

NickC · « **Reply #22 on:** February 13, 2009, 12:59:11 PM »

Quote from: TwoTired on February 11, 2009, 08:17:47 PM

As I understood it, all the after market 4 into 1s were made to fit onto either the F or K models. It's only Honda's F model header/muffler that requires the F model bits (pegs, brake lever, kick start) so it will still tuck next to the frame.

I'm afraid Nick's setup isn't going to fare well while canyon carving in right hand turns.

Cheers,

It's no issue in the land of flat strait roads

This is more of a temp fix anyway, until I can fab up something else to work....

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Author Topic: 1975 cb550 k , will the same year 550 f 4 into 1 pipes Fit the k? (Read 3420 times)

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