Honda-SOHC

SOHC.co.uk Forums => CB650 => Topic started by: BeatsBreaks on July 20, 2022, 06:08:19 PM

Title: 650 engine year please!
Post by: BeatsBreaks on July 20, 2022, 06:08:19 PM: Hi all...

I've a 650 engine but in struggling to find year of it...

RC03E 2123818 is the number, anyone help - I've seen this page but not sure I understand it correctly - http://www.sohc4.com/cb550/cb650/

Thanks in advance!
Title: Re: 650 engine year please!
Post by: Nurse Julie on July 20, 2022, 06:15:39 PM: Is it a UK model or a USA import?. Is your VIN number the format of the 1st on that list or the 4th on that list?
Title: Re: 650 engine year please!
Post by: Oddjob on July 20, 2022, 07:52:51 PM: According to the page it's a 79. The 80 started with a different prefix on the engine number.

Scrub that, looking at the frame number, it's looks like an 80 SC model.
Title: Re: 650 engine year please!
Post by: BeatsBreaks on July 20, 2022, 08:22:17 PM: Quote from: Nurse Julie on July 20, 2022, 06:15:39 PM
Is it a UK model or a USA import?. Is your VIN number the format of the 1st on that list or the 4th on that list?

Its on a 550 frame!! so no idea if USA or UK

Thx
Title: Re: 650 engine year please!
Post by: Nurse Julie on July 20, 2022, 08:31:48 PM: Quote from: BeatsBreaks on July 20, 2022, 08:22:17 PM
Quote from: Nurse Julie on July 20, 2022, 06:15:39 PM
Is it a UK model or a USA import?. Is your VIN number the format of the 1st on that list or the 4th on that list?

Its on a 550 frame!! so no idea if USA or UK

Thx
No idea then, sorry.
Title: Re: 650 engine year please!
Post by: davefirestorm on July 21, 2022, 07:02:21 AM: I’ve just bought one of these sohc 650s ( not collected it yet ) it only has 1 front brake disc and speedo in kilometers I’m guessing it’s a Canadian import? Haven’t got the engine/frame numbers yet
Title: Re: 650 engine year please!
Post by: BeatsBreaks on July 21, 2022, 05:39:46 PM: Quote from: Nurse Julie on July 20, 2022, 08:31:48 PM
Quote from: BeatsBreaks on July 20, 2022, 08:22:17 PM
Quote from: Nurse Julie on July 20, 2022, 06:15:39 PM
Is it a UK model or a USA import?. Is your VIN number the format of the 1st on that list or the 4th on that list?

Its on a 550 frame!! so no idea if USA or UK

Thx
No idea then, sorry.

No worries :)
Title: Re: 650 engine year please!
Post by: SteveW on July 21, 2022, 10:02:14 PM: My 650 custom, got it on the road in March.
Title: Re: 650 engine year please!
Post by: NICKYBOY on November 17, 2022, 02:48:28 PM: Lovely job, mint. What carbs are they ?
Title: Re: 650 engine year please!
Post by: SteveW on November 17, 2022, 03:00:03 PM: PD50, they were a nightmare to get running right but they are ok now.

I bought a set of VB44’s to go on but they don’t fit as the later 650’s from 1981 had different head spacing.
Title: Re: 650 engine year please!
Post by: andy120t on November 17, 2022, 03:16:56 PM: I found some Gpz600 ones which fit and apparently work well - according to the US forum. Just never had it running on them!
Title: Re: 650 engine year please!
Post by: NICKYBOY on November 17, 2022, 04:49:11 PM: What year/ model GPZ 600 are they from. I cant seem to find any with correct spacings !
Title: Re: 650 engine year please!
Post by: SteveW on November 17, 2022, 05:19:06 PM: Quote from: NICKYBOY on November 17, 2022, 04:49:11 PM
What year/ model GPZ 600 are they from. I cant seem to find any with correct spacings !

They won’t line up, you have to use the original GPZ carb rubbers as they are staggered.
Title: Re: 650 engine year please!
Post by: NICKYBOY on November 17, 2022, 06:05:54 PM: Ah right cheers