Honda-SOHC

SOHC.co.uk Forums => CB500/550 => Topic started by: Nurse Julie on July 10, 2016, 10:22:56 PM

Title: 1978 CB550 F2
Post by: Nurse Julie on July 10, 2016, 10:22:56 PM
Hi all
Does anyone know what tyres were fitted as Standard from new on the above model?
Ta xx
Title: Re: 1978 CB550 F2
Post by: Green1 on July 10, 2016, 10:31:02 PM
I know what your looking at and I was woundering the same thing  ;)
Title: Re: 1978 CB550 F2
Post by: Nurse Julie on July 10, 2016, 10:32:57 PM
What are you looking at then Mick?. If its the same thing I'm looking at, I'm a lot closer to it than you are 😁😁😁
Title: Re: 1978 CB550 F2
Post by: Green1 on July 10, 2016, 10:35:29 PM
Would the thing your looking at happen to have Dunlop Roadmasters by any chance
Title: Re: 1978 CB550 F2
Post by: Nurse Julie on July 10, 2016, 10:37:28 PM
I don't know, I can't see the bloody writing, that's why I'm asking what they should be 😃😃😃
Title: Re: 1978 CB550 F2
Post by: Nurse Julie on July 10, 2016, 10:39:35 PM
Ahaaa, I have just seen the make now. Is that what was on as original? Xx
Title: Re: 1978 CB550 F2
Post by: Green1 on July 10, 2016, 10:41:06 PM
Your right it is closer to you then me and my dads fairly sure they had them. 
Don't worry your safe James took my hard earned cash.  ;)
Title: Re: 1978 CB550 F2
Post by: Nurse Julie on July 10, 2016, 10:42:49 PM
Good, you have too many anyway !!!  :-* :-* :-*
Title: Re: 1978 CB550 F2
Post by: Green1 on July 10, 2016, 10:45:03 PM
Said the person with bikes coming out of there ears.  ;D

I know how to read the date on tyres but I'm not going to share it with you now.  :P
Title: Re: 1978 CB550 F2
Post by: Nurse Julie on July 10, 2016, 10:47:18 PM
Yes, bikes all over the place here. Please tell me the date, I promise I won't call you a shrimp again for a while if you do
Title: Re: 1978 CB550 F2
Post by: Green1 on July 10, 2016, 10:48:29 PM
Can't tell you on those ones the pics to blury
Title: Re: 1978 CB550 F2
Post by: Nurse Julie on July 10, 2016, 10:49:52 PM
Ok Shrimp. I will let you know when I see the bike in the flesh.
Title: Re: 1978 CB550 F2
Post by: Green1 on July 10, 2016, 10:53:17 PM
Do you want to know how?
Title: Re: 1978 CB550 F2
Post by: Nurse Julie on July 10, 2016, 10:54:33 PM
Yes please
Title: Re: 1978 CB550 F2
Post by: Green1 on July 10, 2016, 10:58:27 PM
Trade secret so everyone keep it under your hats  ;)
Look for a 4 digit code close to were its stamped DOT
The code shows the week and year so 1509  will be the 15th week 2009
Title: Re: 1978 CB550 F2
Post by: Nurse Julie on July 10, 2016, 10:59:57 PM
I see, makes sense
Title: Re: 1978 CB550 F2
Post by: Nurse Julie on July 10, 2016, 11:01:40 PM
Does it say 3.60 H19 ? Is that an old tyre size as it seems a bit meaty
Title: Re: 1978 CB550 F2
Post by: Green1 on July 10, 2016, 11:06:38 PM
That does seem to say that if so looks over sized
Title: Re: 1978 CB550 F2
Post by: Nurse Julie on July 10, 2016, 11:12:10 PM
Yes, that's what I thought. They should be 3.25 front. Hopefully get round to seeing it soon, if no one pushes the buy now button beforehand. Anyway, it's only a bike, plenty more out there to be bought. Thanks for your help Shrimp, sorry, Mick xx
Title: Re: 1978 CB550 F2
Post by: Green1 on July 10, 2016, 11:14:02 PM
Rear tyre is 4.10 18 so that looks over sized as well unless Honda did use those sizes that year.  ???
Title: Re: 1978 CB550 F2
Post by: Green1 on July 10, 2016, 11:31:15 PM
Just been told by my brother who is a tyre fitter by trade pre 2000 tyres often have a 3 digit code so 184 will be 18th week 1994
but now I'm wondering what the code would be for 1978 if they even have a code
Title: Re: 1978 CB550 F2
Post by: Nurse Julie on July 10, 2016, 11:34:40 PM
Yes, I see what your saying. I'm not really worried that it's got a non standard size fitted. As long as they are black, round and stick to the tarmac, I'm a happy bunny.
Title: Re: 1978 CB550 F2
Post by: Green1 on July 10, 2016, 11:40:12 PM
Youve done it now I need to know if tyres from the 70's had a code?
Title: Re: 1978 CB550 F2
Post by: Nurse Julie on July 10, 2016, 11:41:53 PM
 ;D ;D ;D ;D Don't loose any sleep over it. Let me know when you find out
Title: Re: 1978 CB550 F2
Post by: Green1 on July 10, 2016, 11:48:07 PM
To late my eyes sting like crazy but I need to know.
Title: Re: 1978 CB550 F2
Post by: Chris400F on July 11, 2016, 02:34:31 PM
Does it say 3.60 H19 ? Is that an old tyre size as it seems a bit meaty
I have no idea what Julie and Mr Green are looking at!
Back in the late 70's when I were a lad people removed the original fit Jap crap rubber and replaced it with TT100's or Avon Roadrunners.
If I remember right then 3.60 H 19 would have replaced an original 3.00 x 19 and similarly a 4.10 H 18 would have replaced a 3.50 x 18.
Can't remember why the sizing was different, something to do with the profile I think.

Oh, found this about dating on older tyres (from a US site, hence the spelling of 'tires').
"Tires manufactured during the 1980s had a three-digit code for the date, with the first two digits indicating the week, and the last digit indicating the year (355 would mean the 35th week of 1985) and tires manufactured in the 1990s had a three-digit date code but with a little triangle (Δ) after the code".
Haven't seen anything about tyres from the 70's, not that you would want to be using them anyway!
Title: Re: 1978 CB550 F2
Post by: Nurse Julie on July 11, 2016, 03:28:28 PM
I was looking at a bike on Fleabay Tom and the tyres looked a bit chunkier than they should  be. I didn't know what would have been on as standard. I have now  been to see the bike and they are indeed oversized.
Title: Re: 1978 CB550 F2
Post by: mike the bike on July 11, 2016, 06:30:54 PM
Thanks for the explanation Mick, I thought they were 506 years old.
Title: Re: 1978 CB550 F2
Post by: Green1 on July 11, 2016, 07:28:35 PM
Thanks for the explanation Mick, I thought they were 506 years old.

Being in Wales yours probably are  ;D
Title: Re: 1978 CB550 F2
Post by: mike the bike on July 11, 2016, 08:25:56 PM
Meaning...what exactly?
Title: Re: 1978 CB550 F2
Post by: Green1 on July 11, 2016, 08:35:02 PM
No comment I'm not going to dig myself into a hole.
Title: Re: 1978 CB550 F2
Post by: mike the bike on July 11, 2016, 09:14:46 PM
It wouldn't have to be a very deep hole either
Title: Re: 1978 CB550 F2
Post by: Green1 on July 11, 2016, 09:30:04 PM
Haha don't you start.
I let you know I'm almost average
Title: Re: 1978 CB550 F2
Post by: mike the bike on July 11, 2016, 09:48:32 PM
In Japan
Title: Re: 1978 CB550 F2
Post by: Green1 on July 11, 2016, 09:51:03 PM
Thats Ok with me the university I'm working on is swarming with Japs so I feel like a big man  ;D
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