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SOHC.co.uk Forums => CB750 => Topic started by: Sparrow1 on August 16, 2017, 10:30:37 AM

Title: Engine and frame no's
Post by: Sparrow1 on August 16, 2017, 10:30:37 AM
Hi guys,
  Although I found the old thread topic on this, 1, it's more then 120 days old and 2, it doesn't quite answer my question. The site recommends I start a new thread again.
  Bit confused on a K2 I'm looking at. Anyway the numbers are :frame 2074937 and engine 2049772. I've been doing some research and it seems possible to have numbers out (although still in the K2 era) as much as a few thousand. In this case probably around 2 - 4 months apart. I've had a K0 and I have a K3 presently (returned to UK spec) and the numbers in both of these were/are much closer as many of your threads confirm previously with theirs. Any thoughts? What if you were looking to buy this bike? the V5 confirms these numbers.
  Finally the MOT history contradicts the reg date claimed by the present owner, DVLA : July 1971 owner/V5 March 1974, in Scarborough. Do they make mistakes? Anyone come across this?
  Thanks, Nigel.
Title: Re: Engine and frame no's
Post by: neilg on August 16, 2017, 01:01:20 PM
Firstly I can't answer as to whether these numbers are original, however the V5 will show what ever engine number is provided either on original registration by a dealer or a subsequent updated number after an engine swop with the number provided by the keeper at the time. So from the V5 you can't tell if the engine is original or not. Unless of course there is a large difference in manufacturing dates. And yes they most definitely do make mistakes. What prefix is on the registration plate?? That's the big clue as to the correct year. I think July 71 was J and March 74 on an M.
Title: Re: Engine and frame no's
Post by: Sparrow1 on August 16, 2017, 02:50:03 PM
Hi Neil.
  Yes, indeed, it's on an 'M'. Even both engine and Frame no's are consistent with the K2, reg, and the V5. I wonder if the largish separation on these two numbers makes a difference to it's value? It certainly raises my eyebrow but not excessively.. I think a phone call to the DVLA may help. Anyone else have any ideas? Been here before?
  It's a pity the Brit market never received any engines with the improved upgrades, as in the next year, on the K3.. The European market semed far less important than the USA and Germany one. A long wait until the K6!
  Nigel.
Title: Re: Engine and frame no's
Post by: Bryanj on August 16, 2017, 04:06:22 PM
The big difference in numbers is because in UK we kept getting K" whilst US had K3,4,5,6, and the engine numbers kept going up
Title: Re: Engine and frame no's
Post by: Sparrow1 on August 16, 2017, 05:26:28 PM
Ah,
  Thanks Bryanj.
   And it appears to be a cock up within the DVSA dept. an MOT Inspector wrote the wrong year down.
    So the numbers are perfectly reasonable in the UK and to be expected from time to time. Thanks.
   Nige.
   
Title: Re: Engine and frame no's
Post by: Trigger on August 16, 2017, 05:28:57 PM
Hi Nigel, Have not seen you for a while mate.
If it is a UK K2, if so the numbers are correct as long as they start with 20**** and there was a few late registered into early 1973 with 20 engine numbers.
How can you have a K3 returned to UK spec ? We never had K3 in the UK. And Yes you can have mistakes on paperwork.

Title: Re: Engine and frame no's
Post by: sprinta on August 16, 2017, 06:54:44 PM
Firstly I can't answer as to whether these numbers are original, however the V5 will show what ever engine number is provided either on original registration by a dealer or a subsequent updated number after an engine swop with the number provided by the keeper at the time. So from the V5 you can't tell if the engine is original or not. Unless of course there is a large difference in manufacturing dates. And yes they most definitely do make mistakes. What prefix is on the registration plate?? That's the big clue as to the correct year. I think July 71 was J and March 74 on an M.

My understanding is that normally the engine number would be higher than the frame number so on the numbers you have given they are both K2 but the engine may be from an earlier bike than the one you have?

UK K2's, I believe, continued to have 20###### series frame numbers but they would have received the current latest engines in subsequent years. So that when the K3 were released the UK K2's would still have had 20###### frame numbers but the engine numbers would then have started from 22##### and then when the K4's were released they would have then start from 23##### and so on.
Title: Re: Engine and frame no's
Post by: Sparrow1 on August 16, 2017, 10:39:36 PM
Trigger,
  Good to back! I have a lovely K3 and back in the 750 loop once again..👍😊
  Indeed, poor words regarding my K3. Yes, of course there was never a K3 and I hear ' pratt' quietly spoken by others. I love the Flake Orange (with a tad more flack in this one!) and wanted the Honda improvements on the engine. With all that the bike is back in UK spec featuring handle bars and UK rear 'subtle' lens and black bracket, along with the front indicators attached in the UK way - subtle changes but as close as I dare go, barring the colour of course. She can be retuned to US spec quite quickly.
   My heart lies in a UK K2 and has done so for a while. Hopefully not long now.. Having both of these bikes, in top notch, will make me a happy bunny and very fortunate. Cheers.
  Nige.
Title: Re: Engine and frame no's
Post by: Trigger on August 17, 2017, 06:34:31 AM
Trigger,
  Good to back! I have a lovely K3 and back in the 750 loop once again..👍😊
  Indeed, poor words regarding my K3. Yes, of course there was never a K3 and I hear ' pratt' quietly spoken by others. I love the Flake Orange (with a tad more flack in this one!) and wanted the Honda improvements on the engine. With all that the bike is back in UK spec featuring handle bars and UK rear 'subtle' lens and black bracket, along with the front indicators attached in the UK way - subtle changes but as close as I dare go, barring the colour of course. She can be retuned to US spec quite quickly.
   My heart lies in a UK K2 and has done so for a while. Hopefully not long now.. Having both of these bikes, in top notch, will make me a happy bunny and very fortunate. Cheers.
  Nige.

The K3 sounds nice, lets have a picture of her.
What about the rest of your collection, do you still have that stunning CB450 ?
I have always had a soft spot for the UK K2.
Title: Re: Engine and frame no's
Post by: Sparrow1 on August 17, 2017, 10:24:16 AM
Morning Trigger.
  Ok, I'll dig one out.
  Indeed the Bomber is well and lovely. Wasn't sure if I was allowed to mention a 450 here! 😳
  Let you know about this K2. Have now spoken to the restorer - sounds promising.

  Nige.
Title: Re: Engine and frame no's
Post by: Sparrow1 on August 18, 2017, 04:33:42 PM
Still trying to upload photos on this thread?! Strange, as My profile photo worked...🤔
  So, so put a closure on this, the engine number indeed proved to be a problem with this year and frame no. As Sprinta stated, later confirmed by Trigg, 220/230's are the correct no's for the later K2's and the 204 is from an earlier K2, Circa 1972 and was fitted to the 1974 frame due to common problem then of the chain letting go. The restorer replaced the engine in good faith, keeping it as close to the original frame no, an easy mistake to make many years ago. Now days, engines are repaired if feasible.  I've pulled out sadly but my thanks to all contributed to this thread and particularly to Trigger for guiding me through this - preventing an embarrassing resale value in years to come perhaps.
  Back to looking and trying to work why the this thread won't accept my IPad photos..hmmm..
  Nige.
Title: Re: Engine and frame no's
Post by: Trigger on August 18, 2017, 09:33:03 PM
Still trying to upload photos on this thread?! Strange, as My profile photo worked...🤔
  So, so put a closure on this, the engine number indeed proved to be a problem with this year and frame no. As Sprinta stated, later confirmed by Trigg, 220/230's are the correct no's for the later K2's and the 204 is from an earlier K2, Circa 1972 and was fitted to the 1974 frame due to common problem then of the chain letting go. The restorer replaced the engine in good faith, keeping it as close to the original frame no, an easy mistake to make many years ago. Now days, engines are repaired if feasible.  I've pulled out sadly but my thanks to all contributed to this thread and particularly to Trigger for guiding me through this - preventing an embarrassing resale value in years to come perhaps.
  Back to looking and trying to work why the this thread won't accept my IPad photos..hmmm..
  Nige.

That's another beer you owe me  ;D ;D ;D
Title: Re: Engine and frame no's
Post by: Sparrow1 on August 18, 2017, 09:54:10 PM
Indeed! A pleasure! 🍻
Title: Re: Engine and frame no's
Post by: Trigger on September 12, 2017, 10:13:57 PM
Indeed! A pleasure! 🍻

I did find a vid of your Black Bomber >>>
https://www.youtube.com/watch?v=Ji3CpP8SEls
https://www.youtube.com/watch?v=6ujCvq-YQMc
Title: Re: Engine and frame no's
Post by: AshimotoK0 on September 13, 2017, 11:28:38 AM
Morning Trigger.
  Ok, I'll dig one out.
  Indeed the Bomber is well and lovely. Wasn't sure if I was allowed to mention a 450 here! 😳
  Let you know about this K2. Have now spoken to the restorer - sounds promising.

  Nige.

Course you are allowed to mention your Bomber  on here in 'Other Bikes' section. I have one, albeit in a million bits, and sold a project one to a member on here a few months back ! Plus another member has just imported a flip front seat '67 one. So there are at least four of us on here including yourself who own one. I just scored a 'NOS in box' front guard for mine in Japan for £101  .. one happy bunny .. I told the guy to bid up to £330 (yes they are that rare) but nobody bid against us so it went for the start price. DS does repros for £330 but they don't look right IMHO because they have folded over front and rear edges.
Title: Re: Engine and frame no's
Post by: BigAl (Alan) on September 13, 2017, 02:22:14 PM
Production figures? as image, figures out of Haynes (Great Bike series CB750) Nigel's figures starting at 20****  seem correct.
My concern is the produced K2 numbers of 63,500?...as Nigel's bike is 74,937 (frame No. 2074937) I have assumed that numbering would start from 000001? Is there a correct Honda list of produced bikes?

Alan
Title: Re: Engine and frame no's
Post by: Trigger on September 13, 2017, 02:41:08 PM
The figure 63.500 is incorrect as the UK units carried on until 1975, though I have seen UK Unit VINs starting with 210  ;)
Title: Re: Engine and frame no's
Post by: JamesH on September 13, 2017, 05:22:57 PM
I'm the other 'lurking' bomber owner .

Maybe we should start a separate bomber thread?

Photo of mine down at the Goodwood Revival this weekend..

(https://uploads.tapatalk-cdn.com/20170913/f52237437c7d34da65dbfc1a66691cfc.jpg)
Title: Re: Engine and frame no's
Post by: MCTID on September 13, 2017, 10:05:22 PM
Lovely Bomber James.....I (of course) like most of the Honda's from this era..........never contemplated a CB450 personally, but there is just something about this CB450 which looks 'right'. Maybe it's that first model which steps up from the gorgeous 250/ 305 twins to a bigger bike (engine capacity and cycle parts) which makes this one so attractive. In particular, I love the chrome panels on the tank and the saddle, and the side panels, and the clocks, and the exhausts.....you get my drift !

My Sister in Law bought a new Honda CRX car about 1990 and I opened the bonnet and thought 'Wow' because everything just looked 'right' and in the right place and configuration. Perfect. And I think the Bomber is also in that league.

I think you are right to keep it exactly as it is (I would have to polish and preen it) and I hope you will post some more photos of it in the future.......on it's days out. Just ferking beautiful !
Title: Re: Engine and frame no's
Post by: Sparrow1 on September 27, 2017, 06:22:23 PM
Ashimoto, James and MCTID,  Trigger, (never knew a video existed on my Bomber!!)😳👍
  My apologies for not thanking you all for your Bomber contribution - still looking for an earlyish 750 and have been somewhat distracted. Hard work finding a decent one!
  James, you have lovely Bomber, fancy we try to get a couple more together meeting halfway? (I live in Ringwood).  I'm running a Jap bike day at Sammy Millers, New Forest on the 2 June 2018 and you and all of you guys are most welcome to join in. Some really lovely Jap stuff on the day, which is now in it's 4th year. Around 60 - 80 bikes attend and the awards are sponsored by the VJMC.
  The final tale of that K2 I was looking at was that it turned out to have an earlier K2 engine in it. It was the wrong engine for it's year.
  Now, back to trying to find the 'right' 750....🤔
  Nige.
Title: Re: Engine and frame no's
Post by: JamesH on September 27, 2017, 06:46:59 PM
Hi Nige. Definitely up for meeting with the Bombers in 2018. Yours looks stunning. I'll be in touch next week re. my K2. It's pretty much there now. James.
Title: Re: Engine and frame no's
Post by: Sparrow1 on September 29, 2017, 04:45:58 PM
Didn't know you're a Bomber bloke, although I remember you telling me you had many, many bikes.
  It is addictive I agree...🤔

  Nige.
Title: Re: Engine and frame no's
Post by: JamesH on September 29, 2017, 06:56:08 PM
Probably best I don't disclose how many on a public forum Nige. Let's just say a few. Have a '68 CL450 as well. Like the 450 twins a lot..
Title: Re: Engine and frame no's
Post by: Nurse Julie on September 30, 2017, 10:00:17 PM
Here is Nigel and his lovely Bomber again, with Trigger. This was the day after we all met up at Sammy Millers for the classic Jap bike day in 2015.[attachimg=1]
Title: Re: Engine and frame no's
Post by: Rozabikes Tim on October 01, 2017, 08:53:06 AM
Probably best I don't disclose how many on a public forum Nige. Let's just say a few. Have a '68 CL450 as well. Like the 450 twins a lot..
Was it yourself that had a 450 flat tracker too? Loved that...
Title: Re: Engine and frame no's
Post by: JamesH on October 01, 2017, 09:13:47 AM
Probably best I don't disclose how many on a public forum Nige. Let's just say a few. Have a '68 CL450 as well. Like the 450 twins a lot..
Was it yourself that had a 450 flat tracker too? Loved that...
No think that was Woodside?
Title: Re: Engine and frame no's
Post by: Woodside on October 01, 2017, 09:27:36 AM
yep the metal flake silver one...now sold ..it was cracking
Title: Re: Engine and frame no's
Post by: mike the bike on October 01, 2017, 04:27:51 PM
Hi Nigel
Good to hear from you again,  it's been a while.  June 2nd is in my diary.
Title: Re: Engine and frame no's
Post by: Sparrow1 on October 01, 2017, 04:56:00 PM
Mike!
  Great to hear from you and hope your trusty 750 is still going strong! I have been out of it for a while, 750 less, the K0 had to go sadly.. but have had a decent K3 over the last year now anyway. She's a happy bike and chats to the 450's in the garage - Er, along with the Truimph 650's. No overhead cams to found on those, although i'm pushing my luck on this forum now indeed!!😉
  Very good to hear from you and really look forward to meeting you and (your friends?) again in June!
   Happy memories Julie (love the photos - oooozing with pride me!) and love reading your posts and love your dry wit dealing with these hairy bikers! 😊
   I hope you could consider coming on down again with Trig? I'm sure we'll put something on as well as the the Sammy Jap day also. A good Forest run the next day and breaking out of it's boundaries and into a pub? Surely You both can't refuse that!🍺🍾
   James, understood, Mum's the word.. Love the CL 450 but saving up for the bigger bike!😉
  Nige.
 
Title: Re: Engine and frame no's
Post by: Nurse Julie on October 01, 2017, 05:35:19 PM
   Happy memories Julie (love the photos - oooozing with pride me!) and love reading your posts and love your dry wit dealing with these hairy bikers! 😊
   I hope you could consider coming on down again with Trig? 
I'm sure we will try to get down there Nigel. It was a great day out.
Title: Re: Engine and frame no's
Post by: mike the bike on October 01, 2017, 07:07:32 PM
Trusty 400 actually.   
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