Author Topic: Major problem fitting exhausts.  (Read 856 times)

Offline Phil9886

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Major problem fitting exhausts.
« on: July 14, 2020, 01:48:22 PM »
So - feeling quite depressed now. I couldnt seem to make the new exhaust system for the K6 line up with the rear mounting point once the end was in the cylinder head.  Have just checked the part numbers and two of the pipes supplied have different part numbers to the K6 drawing / parts list (the two without the decal that screws on). Checking part numbers the system I have is for a pre-K6 model. But the question is - is a K6 exhaust system different in terms of dimensions to a pre-K6 version. Or should the exhaust systems be interchangeable?  The photo shows the part numbers I have.

Also, the main supporting bolt at the rear is too large a diameter to fit through the rear footrest brackets. However I bought the footrest brackets new from the K6 page of CMSNL - so this is all getting very strange.

Hopefully I'm doing something stupid. That wouldn't be the first time. But has anyone got any ideas?

Offline Nurse Julie

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Re: Major problem fitting exhausts.
« Reply #1 on: July 14, 2020, 02:02:10 PM »
All the 341 exhaust systems are for a K2-K6 and if you can't get the foot rest bolt into the foot rest hanger, it may be where you have had the frame powder coated and the hole is too small.
No. 2 pipe, goes inside of the side stand and all should fit.
Edit..... Maybe you have been supplied the incorrect brackets as the K6 brackets have been no longer available for a long time now, did they have 341 middle part number🤔🤔🤔
« Last Edit: July 14, 2020, 02:09:42 PM by Nurse Julie »
LINK TO MY EBAY PAGE. As many of you know already, I give 10% discount and do post at cost to forum members if you PM me direct.
https://www.ebay.co.uk/sch/julies9731/m.html?item=165142672569&rt=nc&_trksid=p2047675.m3561.l2562

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Offline Phil9886

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Re: Major problem fitting exhausts.
« Reply #2 on: July 14, 2020, 02:24:40 PM »
Thanks for the quick answer. I've attached a photo of the problem.  Believe me there is no way the rear mounting point is going to line up. I started this project about 10 years ago and memory is fading now. But I do remember getting a new cylinder head (and having it blasted and painted) as fins were broken on the original. Now I'm wondering if I ended up with a cylinder head from a K7? Could that be the problem? If it is - it's out with the engine again and I'll be looking for a new cylinder head.

Regarding the rear footpeg - I can just drill that out to the larger diameter to fit the supporting bolt so a relatively easy fix. But a new cylinder head! Damn!!!

Offline Bryanj

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Re: Major problem fitting exhausts.
« Reply #3 on: July 14, 2020, 02:28:29 PM »
That exhaust is the wrong side of the sidestand

Offline Andrew-S

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Re: Major problem fitting exhausts.
« Reply #4 on: July 14, 2020, 02:33:25 PM »
That exhaust is the wrong side of the sidestand

Yep, feed it in from underneath and pull back into position.
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Offline Nurse Julie

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Re: Major problem fitting exhausts.
« Reply #5 on: July 14, 2020, 02:37:15 PM »
The cylinder head is just fine, it's just the pipe you have in the wrong position.
LINK TO MY EBAY PAGE. As many of you know already, I give 10% discount and do post at cost to forum members if you PM me direct.
https://www.ebay.co.uk/sch/julies9731/m.html?item=165142672569&rt=nc&_trksid=p2047675.m3561.l2562

LINK TO MY CB400/4 ENGINE STRIP / ASSESSMENT AND REBUILD...NOW COMPLETE
http://www.sohc.co.uk/index.php/topic,14049.msg112691/topicseen.html#new

Offline Phil9886

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Re: Major problem fitting exhausts.
« Reply #6 on: July 14, 2020, 02:41:06 PM »
There aren't words to explain how embarrassed I am right now. And relieved!  Yes it fits fine now.  THANKS SO MUCH!!!

Offline Nurse Julie

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Re: Major problem fitting exhausts.
« Reply #7 on: July 14, 2020, 02:49:04 PM »
There aren't words to explain how embarrassed I am right now. And relieved!  Yes it fits fine now.  THANKS SO MUCH!!!
Good, I'm pleased you sorted it out. You aren't the first and you for sure won't t be the last to not be able to see the wood for the trees.
LINK TO MY EBAY PAGE. As many of you know already, I give 10% discount and do post at cost to forum members if you PM me direct.
https://www.ebay.co.uk/sch/julies9731/m.html?item=165142672569&rt=nc&_trksid=p2047675.m3561.l2562

LINK TO MY CB400/4 ENGINE STRIP / ASSESSMENT AND REBUILD...NOW COMPLETE
http://www.sohc.co.uk/index.php/topic,14049.msg112691/topicseen.html#new

Offline Andrew-S

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Re: Major problem fitting exhausts.
« Reply #8 on: July 14, 2020, 02:52:20 PM »
There aren't words to explain how embarrassed I am right now. And relieved!  Yes it fits fine now.  THANKS SO MUCH!!!

We've all been there over one issue or another over the years, whether classic bikes or cars - glad it's all come to together now and goes to show the power of this forum.
1972 UK XL250 K0 Motosport
1976 UK Z900 A4
2018 BMW R1200 GS

Offline MrDavo

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Re: Major problem fitting exhausts.
« Reply #9 on: July 14, 2020, 03:02:36 PM »
That exhaust is the wrong side of the sidestand

Been there, done that.....
1969 Honda CL450 'Scrambler'
1974 Kawasaki Z1A
2005 Harley XL1200R Sportster
1985 Porsche 911 3.2 Carrera Sport
1978 VW Bay Window camper van

Offline Phil9886

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Re: Major problem fitting exhausts.
« Reply #10 on: July 14, 2020, 03:25:52 PM »
Yep. It really did show the power of the forum. Hope I can help someone out one day. One side done and the other to go. It's actually a work of art by Honda.

Offline Andrew-S

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Re: Major problem fitting exhausts.
« Reply #11 on: July 14, 2020, 04:24:45 PM »
Yep. It really did show the power of the forum. Hope I can help someone out one day. One side done and the other to go. It's actually a work of art by Honda.

Looking great, don't forget to fit your pillion footrest.  ;)

Cheers, Andrew
1972 UK XL250 K0 Motosport
1976 UK Z900 A4
2018 BMW R1200 GS

Offline Phil9886

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Re: Major problem fitting exhausts.
« Reply #12 on: July 14, 2020, 06:04:24 PM »
Thanks. Yes - have remembered those but need to drill / ream the hole in the footrest bracket out to 14mm. My brackets have a smaller (10mm?) hole but appear to be identical in every other way to the originals.

Offline honda-san

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Re: Major problem fitting exhausts.
« Reply #13 on: July 14, 2020, 07:24:12 PM »
I suspect your brackets are actually from a 550 which used a 10mm diameter mounting bolt. Other than the hole, they appear the same as the 750K6 ones.

Chris R.
Chris R.

 

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