Author Topic: 1976 CB550F1 (what have I let myself in for) Project  (Read 8660 times)

Offline eight0

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Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #165 on: February 21, 2021, 10:45:16 AM »
Right I think I'm ready to do this. Last minute check to see if those more experienced can spot anything wrong.
I don't need to put hondabond on the crank posts (not sure what they're called) do I?

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1x 1976 CB550F1
1x 1977 DT250
1x KTM EXC 300 TPI
1x 1998 CBR600 FW
1x 1978 CX500

Offline hairygit

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Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #166 on: February 21, 2021, 11:21:10 AM »
Just a VERY thin smear on the outer pair.

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Offline philward

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Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #167 on: February 21, 2021, 11:26:44 AM »
Hairy has beat me to it - just done mine.mere'st smear on outer eadge of crankcase surface
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Offline Oddjob

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Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #168 on: February 21, 2021, 01:06:49 PM »
Little tip, where the hole is in the little oil pump on the gearbox, mark the outside of it so you can see where it's located. Do the same with the hole in the lower crankcase, when the 2 marks line up it's located correctly.

I can't see anything wrong with your pic, looks damned good.
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Offline eight0

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Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #169 on: February 21, 2021, 04:59:51 PM »
Success!!!

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Thanks for the help everyone.
1x 1976 CB550F1
1x 1977 DT250
1x KTM EXC 300 TPI
1x 1998 CBR600 FW
1x 1978 CX500

Online K2-K6

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Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #170 on: February 21, 2021, 05:40:12 PM »
Nice work, great when a project gets into the building phase too.

Offline Oddjob

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Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #171 on: February 21, 2021, 06:00:44 PM »
Any problems with the primary shaft installation?
Don't play stupid with me, I'm better at it

Offline eight0

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Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #172 on: February 21, 2021, 06:02:08 PM »
Nope, it was really easy. So much easier than the way I was going to do it.

Couldn't help mocking it up. Still need to paint the head.

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1x 1976 CB550F1
1x 1977 DT250
1x KTM EXC 300 TPI
1x 1998 CBR600 FW
1x 1978 CX500

Offline SteveD CB500K0

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Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #173 on: February 22, 2021, 07:56:08 AM »
Isn’t that a Zero logo?

Going electric?


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2020 Tiger 900 GT Pro
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Offline Oddjob

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Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #174 on: February 22, 2021, 09:06:14 AM »
It's an 8 within a zero, hence his name.
Don't play stupid with me, I'm better at it

Offline eight0

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Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #175 on: February 22, 2021, 09:09:44 AM »
An 0 in an eight sided shape. ;)

My surname is Hayto. My grandad used to make home cine films and call them 'eight-0 films' so that's where it came from.
This bikes not one I'm planning on selling.
1x 1976 CB550F1
1x 1977 DT250
1x KTM EXC 300 TPI
1x 1998 CBR600 FW
1x 1978 CX500

Offline SteveD CB500K0

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Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #176 on: February 22, 2021, 11:05:21 AM »
I was wrong anyway

It’s a Z in a 0




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2020 Tiger 900 GT Pro
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2003 Speed Triple 955 (borrowed)

Offline eight0

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Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #177 on: February 23, 2021, 07:17:44 PM »
Got the pistons on. Is there a desired order of piston ring gaps in terms of orientation?

And before anyone says I have the pistons in the wrong order.. the machinist couldn't work out which was the front of the block so labelled them back to front.

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« Last Edit: February 23, 2021, 07:21:30 PM by eight0 »
1x 1976 CB550F1
1x 1977 DT250
1x KTM EXC 300 TPI
1x 1998 CBR600 FW
1x 1978 CX500

Offline Oddjob

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Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #178 on: February 23, 2021, 10:10:24 PM »
Not in line with the gudgeon pin, I tend to do them at say 10 to and 10 past with the oil ring if it's one piece at 20 to, if not it doesn't really matter so long as both the gaps aren't in line with each other.

Starting to look really nice, genuine pistons or aftermarket?
Don't play stupid with me, I'm better at it

Offline eight0

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Re: 1976 CB550F1 (what have I let myself in for) Project
« Reply #179 on: February 24, 2021, 09:08:20 AM »
Thanks Ken. No, not genuine, they are from DS. I do regret not spending a bit more on the pistons. I got the machinist to bore all to 0.25 over and as a last minute thought when I went to collect it gave him a piston to check all was good.
It was out by a 'few thou' apparently. I gave him all four pistons and none of them fit. Luckily they were all larger than they should be so he was able to save it and re-bore each cylinder to match each piston and did it without charge.
1x 1976 CB550F1
1x 1977 DT250
1x KTM EXC 300 TPI
1x 1998 CBR600 FW
1x 1978 CX500

 

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