Author Topic: any header install tips?  (Read 3100 times)

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Rocking-M

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any header install tips?
« on: April 24, 2007, 02:41:58 PM »
Anyone want to help me dodge any pitfalls with the kerker install? Please jump in!


Offline Jerry Rxman Griffin aka MuthaF'er

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Re: any header install tips?
« Reply #1 on: April 24, 2007, 03:39:51 PM »
Decide where you want your rear mount to go. I used the included bracket. I cut it, bent it, drilled it and attached it to the back side of the rear foot rest rather than up to the top shock mount.

Also, don't forget to check/rejet the carbs before you blue those gorgeous new chrome Kerkers!!   

Other than that just install those bad boys using new copper washers.
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline merc2dogs

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Re: any header install tips?
« Reply #2 on: April 24, 2007, 05:09:22 PM »
and use anti-sieze anywhere you think you need it.

Ken.

Offline LoopsAndLogic

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Re: any header install tips?
« Reply #3 on: April 24, 2007, 05:31:06 PM »
Sorry to butt in, but is it always necessary to replace the copper seals every time you take the headers off??

Thanks

LL
My rides:
75' 76' Honda CB400F Super Sports
86' Honda XR600R for Street Madness
84' Honda Interceptor VF500

Past Rides:
80' Honda CX500C Fully Dressed
81' Honda CB650C very nice!
83' Kawasaki KZ550 A3
78' Hondamatic 400 Hawk
80' 81' 82' Honda GL500 Silverwing Insterstate

Offline KB02

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Re: any header install tips?
« Reply #4 on: April 24, 2007, 05:36:15 PM »
I once had a mechanic tell me that the copper washers (gaskets) are usually good for two or three fitting before that are totally flat and worthless. Basically, they are hollow and as you tighten the header down they squish to meet the header and make the seal. If they are squished all the way, throw them out and get new ones.

... At least that what he said...
« Last Edit: April 24, 2007, 05:49:18 PM by KB02 »
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Offline LoopsAndLogic

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Re: any header install tips?
« Reply #5 on: April 24, 2007, 05:48:04 PM »
Makes sense now ;D

One last question. How would I tell if I have an exhaust leak there?? I don't feal any air nor do I see any soot.

I've had the headers off 2 times already.

 Lets hope it's not one of those discontinued parts :(

Thank you

LL
My rides:
75' 76' Honda CB400F Super Sports
86' Honda XR600R for Street Madness
84' Honda Interceptor VF500

Past Rides:
80' Honda CX500C Fully Dressed
81' Honda CB650C very nice!
83' Kawasaki KZ550 A3
78' Hondamatic 400 Hawk
80' 81' 82' Honda GL500 Silverwing Insterstate

Offline KB02

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Re: any header install tips?
« Reply #6 on: April 24, 2007, 05:51:01 PM »
Air and soot should be the main indicators. The other option is to squirt water on the connection point (while the engine is still cold enough not to evaporate it on contact) and look for bubbles.
1978 CB750K Project
2000 Ducati ST2
...and a pedal bike

Join the AMA today!!

My project thread Part I: K8 Project "Parts Bike"
My project thread Part II: Finishing (yeah, right) touches on Project "Parts Bike"

Rocking-M

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Re: any header install tips?
« Reply #7 on: April 24, 2007, 06:12:25 PM »
Thanks Fellows, I'll mod the rear bracket soon but wanted to hear it run!
Getting those pipes in the exhaust holes from the heads was a bit of a pain.
Took it real slow so I didn't strip any studs. Rubber hammer is the ticket.

The baffle that Kerkers have to come with now really are to quite.
I don't even think a rejet is needed with these baffles.
I think I'll get the 1 1/2 race baffle for when I really want to hear
it or just jerk the current baffle out and let it roar ;D

I'll post pictures soon!

Offline LoopsAndLogic

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Re: any header install tips?
« Reply #8 on: April 24, 2007, 06:34:20 PM »
You still would want to do a plug chop!!!

Even though it may not sound loud and less restrictive doesn't mean it isn't.

I learned the hard way when I installed a quite superbike pipe on my CB just for fun. Looked at the plugs a little later on, and they were Grey (lean).

Best to be safe and do a plug chop.

Thanks for the help and best of luck to you

LL
My rides:
75' 76' Honda CB400F Super Sports
86' Honda XR600R for Street Madness
84' Honda Interceptor VF500

Past Rides:
80' Honda CX500C Fully Dressed
81' Honda CB650C very nice!
83' Kawasaki KZ550 A3
78' Hondamatic 400 Hawk
80' 81' 82' Honda GL500 Silverwing Insterstate

Offline jrrobertsjr

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Re: any header install tips?
« Reply #9 on: April 24, 2007, 06:46:40 PM »
Some of the old school, hard core guys have said that you can boil those header gaskets.

If they are sealed, the air will expand on the inside and return them to a useable donut.

Never tried it but maybe someone has a few used ones laying around and could give it a shot.


Offline MRieck

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Re: any header install tips?
« Reply #10 on: April 24, 2007, 07:04:26 PM »


 Lets hope it's not one of those discontinued parts :(

Thank you

LL
There are plenty. ;)
Owner of the "Million Dollar CB"

Online ofreen

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Re: any header install tips?
« Reply #11 on: April 24, 2007, 07:27:40 PM »
Some of the old school, hard core guys have said that you can boil those header gaskets.

If they are sealed, the air will expand on the inside and return them to a useable donut.

Never tried it but maybe someone has a few used ones laying around and could give it a shot.



Naw, they are not airtight.  Plus, when installed, they get squashed flatter than Keira Knightley's chest.  You can reuse them, but odds are good they will start leaking.  New ones don't cost that much.  You will need to retorque the exhaust after the first run, then check it again after a few hundred miles.
Greg
'75 CB750F

"I would rather have questions I cannot answer than answers I cannot question." - Dr. Wei-Hock Soon

Offline jtb

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Re: any header install tips?
« Reply #12 on: April 24, 2007, 08:18:45 PM »
Quote

Naw, they are not airtight.  Plus, when installed, they get squashed flatter than Keira Knightley's chest.  You can reuse them, but odds are good they will start leaking.  New ones don't cost that much.  You will need to retorque the exhaust after the first run, then check it again after a few hundred miles.
Quote

Who the Hell is Keira Knightley?
1977 CB750F
1985 V65 Sabre
1986 VFR 750 (gone but missed greatly)

Offline jtb

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Re: any header install tips?
« Reply #13 on: April 24, 2007, 08:20:49 PM »
Rocking-M,  how about a sound file along with the pictures.  I need something to drown out the engine noise  ;D ;D
1977 CB750F
1985 V65 Sabre
1986 VFR 750 (gone but missed greatly)

Online ofreen

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Re: any header install tips?
« Reply #14 on: April 24, 2007, 08:41:17 PM »

Who the Hell is Keira Knightley?

A semi-famous anorexic Hollywood actress.
Greg
'75 CB750F

"I would rather have questions I cannot answer than answers I cannot question." - Dr. Wei-Hock Soon

Rocking-M

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Re: any header install tips?
« Reply #15 on: April 25, 2007, 03:43:37 AM »
Rocking-M,  how about a sound file along with the pictures.  I need something to drown out the engine noise  ;D ;D

Hey JTB, with the stock kerker baffle I could hear the engine noise real good ;D
Without it I can drown out a harley with loud pipes ;D ;D

I had doctored the stock f muffler and it was louder than the stock kerker baffled system.
Sounded pretty good actually but the pipes had been abused over the years and I've wanted a
kerker since the 70's. The kerker has got to weigh at least 20 lbs. less than the stock Honda system. :) ;)