Author Topic: Are special footpeg and brake lever needed for 550 F exhaust?  (Read 640 times)

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Offline jakec

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We are fitting an F exhaust on the 550 chopper. It currently has K model pegs. Just wondering if there is a specific footpeg and brake lever that gives clearance to the 4into1 collector? or if proceeding with K model parts will work? We do not have the exhaust on hand yet or I would check myself.
1970 CB750 K0
1977 CB750 Chop
1997 XR650L

Offline caluser2000

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Re: Are special footpeg and brake lever needed for 550 F exhaust?
« Reply #1 on: March 31, 2021, 10:29:36 AM »
The kick start fitting that connects to the kick start shaft spline is longer by about an 1: or more and foot peg mount extended also about that amount to clear where the headers come together into the collector  on the rhs. The rear brake lever is also extended outwards for the same reason.
« Last Edit: March 31, 2021, 10:48:11 AM by caluser2000 »
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Offline bryanj

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Re: Are special footpeg and brake lever needed for 550 F exhaust?
« Reply #2 on: March 31, 2021, 02:56:15 PM »
Footrest is different, kickstart is different and brake pedal different all to clear the F exhaust, may be easier touse K parts and aftermarket 4 into 1 exhaust
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Offline jonda500

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Re: Are special footpeg and brake lever needed for 550 F exhaust?
« Reply #3 on: March 31, 2021, 06:48:25 PM »
The F model foot peg folds up for kick start lever clearance when kick starting and has a dedicated mounting stud that is unique to the F frame - you may be able to install one to a K frame so that a F foot peg will fit though. If you aren't using an F model kick start lever the K model foot peg will work fine.

The F model brake lever pivot tube and pivot shaft are both much longer to allow room for the four into one collector and the brake lever is constructed from flat steel rather than tube to allow the kick starter to clear it and so that cornering clearance isn't compromised.

The F model kick start lever will not work with the K foot peg, it needs the F foot peg that has a fold up mechanism like the 400-4 has. I have found that a 77/78 K model kick start lever will work with the F model 4 into 1 fitted but scrapes the exhaust when kicking.

So putting a 4 into 1 from an F onto a K is possible but not by just bolting on the right parts.

John
Remember that an ignoramus is only someone who doesn't know something you just learned yesterday!

A starter clutch thread:
http://forums.sohc4.net/index.php/topic,122084.0.html
1972 CB500K1 original 4 owner bike
1972 CB500K1 returned to complete/original condition
1975 CB550F built from parts - project thread:
http://forums.sohc4.net/index.php/topic,149161.msg1711626.html#msg1711626
197? CB500/550 constructing from left over parts
1998 KTM 380 (two stroke) recent impulse buy, mmmm...

Offline jakec

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Re: Are special footpeg and brake lever needed for 550 F exhaust?
« Reply #4 on: April 01, 2021, 12:44:39 PM »
I see, so it is like the 400. Looks like I would need:

Brake lever pivot
Brake lever
Footpeg
Kickstart

That's a lot of parts! haha ok. May just have to cut the pipes off before the collector (this is for a chopper and it will be straight piped anyways. May just slash cut the pipes right before the pegs
1970 CB750 K0
1977 CB750 Chop
1997 XR650L

Offline carnivorous chicken

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Re: Are special footpeg and brake lever needed for 550 F exhaust?
« Reply #5 on: April 01, 2021, 02:20:15 PM »
I see, so it is like the 400. Looks like I would need:

Brake lever pivot
Brake lever
Footpeg
Kickstart

That's a lot of parts! haha ok. May just have to cut the pipes off before the collector (this is for a chopper and it will be straight piped anyways. May just slash cut the pipes right before the pegs

Speaking of which, I believe the 400F pegs will mount to a 550K frame, but dunno about clearance issues, etc.

Offline Scott S

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Re: Are special footpeg and brake lever needed for 550 F exhaust?
« Reply #6 on: April 01, 2021, 02:37:20 PM »
I see, so it is like the 400. Looks like I would need:

Brake lever pivot
Brake lever
Footpeg
Kickstart

That's a lot of parts! haha ok. May just have to cut the pipes off before the collector (this is for a chopper and it will be straight piped anyways. May just slash cut the pipes right before the pegs

 Not quite that simple. Look at the pic you posted at how the brake lever is fitted to the frame. Even if you got all the parts, the K frame is different in how the brake pivot mounts.
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Offline jakec

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Re: Are special footpeg and brake lever needed for 550 F exhaust?
« Reply #7 on: April 02, 2021, 02:09:04 PM »
How it mounts? Or just where is mounts? We are using an amen hardtail frame.
1970 CB750 K0
1977 CB750 Chop
1997 XR650L

Offline caluser2000

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Re: Are special footpeg and brake lever needed for 550 F exhaust?
« Reply #8 on: April 02, 2021, 02:27:26 PM »
How it mounts? Or just where is mounts? We are using an amen hardtail frame.

What have you got set up at the moment. being a non standard frame fitting standard foot pegs etc may be off.
« Last Edit: April 02, 2021, 05:20:39 PM by caluser2000 »
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Offline jonda500

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Re: Are special footpeg and brake lever needed for 550 F exhaust?
« Reply #9 on: April 02, 2021, 05:17:32 PM »
How it mounts? Or just where is mounts? We are using an amen hardtail frame.
The brake lever mounts to the rear brake pivot shaft in exactly the same way, the pivot tube is in almost the same place as a K but is longer on the F frame to match the longer pivot shaft. To use an F pivot shaft and pedal you would need to extend the K pivot tube (could just be a collar (short tube) slipped onto the shaft between the pedal and the pivot tube). The harder part to fit is the folding foot peg because the F frame has a RH foot peg mounting stud where as the K doesn't (uses the lower rear engine mount).
John
Remember that an ignoramus is only someone who doesn't know something you just learned yesterday!

A starter clutch thread:
http://forums.sohc4.net/index.php/topic,122084.0.html
1972 CB500K1 original 4 owner bike
1972 CB500K1 returned to complete/original condition
1975 CB550F built from parts - project thread:
http://forums.sohc4.net/index.php/topic,149161.msg1711626.html#msg1711626
197? CB500/550 constructing from left over parts
1998 KTM 380 (two stroke) recent impulse buy, mmmm...