Topic: Original Tire Identification

[craigermags]

Can you guys help me out there. I originally had a 1970 CB750 when I was 18 yrs old and sold it a few years later.............Anyway 40 years later I am now restoring a 1971 CB750 but have no memory who the original tire manufacturer was or if the same tires can be obtained.

I am considering using a Dunlap tire but the original manufacture would be preferred for this restoration.

Can anyone help me on this. Thanks   Craig

[Muckinfuss]

Chen-Shin.   C-rib on front.  variety of Chen-Shin on rear....C-180, C-287 and a couple of others. 

Try these guys...http://www.coolretrobikes.com/hondawheels.htm        Coker also makes some vintage treads, but the sidewall won't be correct.

[Lostboy Steve]

Did Nitto make any of the tires for the early models? My 68 z50 has the original Nitto knobbies on it.

[Stev-o]

I believe Bridgestones were the OEM tire back then, that particular model is no longer made.
Dunlop Gold Seals may have come on some later models.

Dunlop K81 is a very good tire for the rear and gives the correct period look. 4.00x18" is the correct size.


http://www.motorcycle-superstore.com/20560/i/dunlop-k81-rear-tire

At any rate, don't use any cheap china crap! [cheng shin]

[Muckinfuss]

He wanted to know what was original.  That was Chen Shin, not Bridgestone or Dunlop.  As far as the other post, I'm only aware of the IRC Tractor Grip that is still sold by Honda.  Nitto?  Perhaps if the wheel was upgraded from an 8" to a 10".

[Lostboy Steve]

No the 1968 z50k0 came with Nitto Tires. I was just wondering if Back in 1968, they used Nittos on anything else.

[Dream750]

As per the first CB750 parts book, dated April 1969 ... Beginning with frame no: 1000001, the CB750 was fitted with either Bridgestone or Dunlop tires.
 
At frame no: 1013459 the rear fender tire decal appears and comes as two separate decals. Honda PN: 8705-300-670 and this is correct for the K0 and K1 bikes. (first pic below)
 
Beginning with the K2, the rear fender tire decal changes to a one piece style, Honda PN: 8705-341-670 (second pic below)
 
The original Bridgestone/Dunlop tires are no longer available from Honda, but you can have the correct rear fender tire decal for your 1971 CB750 restoration.

[ekpent]

I remember reading a vintage British road test recently of a 1969 or 70 750 that said the bike had Dunlap K-77's on their machine.

[Stev-o]

As per the first CB750 parts book, dated April 1969 ... Beginning with frame no: 1000001, the CB750 was fitted with either Bridgestone or Dunlop tires.
 

Thank you for confirming, John.

[Dream750]

You're welcome Stev-o.
 
Wish I had better pics to post up in reply #6.    
 
If you go to a larger view, you can see the Bridgestone/Dunlop brands shown on the bottom of both types of the fender decals. 

[Stev-o]

You're welcome Stev-o.
 
Wish I had better pics to post up in reply #6.    
 
If you go to a larger view, you can see the Bridgestone/Dunlop brands shown on the bottom of both types of the fender decals. 

It's a good pic, the brands can be clearly read. 
Your knowledge here is very much appreciated.  Thanks again.

[Kevin D]

I found this at Motorcycle Yamiya:

TIRE SET, FRONT F11 & REAR K87
FRONT:3.25-19
REAR:4.00-18
Manufactured by: DUNLOP
225.29 USD

http://www.yamiya750.com/index.php?main_page=product_info&cPath=144_87&products_id=1799

Oh, thats an F11 not an F6 Dunlop for the front.

[Retro Rocket]

He wanted to know what was original.  That was Chen Shin, not Bridgestone or Dunlop.  As far as the other post, I'm only aware of the IRC Tractor Grip that is still sold by Honda.  Nitto?  Perhaps if the wheel was upgraded from an 8" to a 10".

I'm not sure where you got that from , the 750's used  Bridgestone and Dunlop , Chen shin were absolute rubbish in the beginning, i mean dangerous sh1t, and aren't much better these days although they are far better than the early ones... Ask me how i know...?

[ekpent]

He wanted to know what was original.  That was Chen Shin, not Bridgestone or Dunlop.  As far as the other post, I'm only aware of the IRC Tractor Grip that is still sold by Honda.  Nitto?  Perhaps if the wheel was upgraded from an 8" to a 10".

 Ask me how i know...?

How do you know .  Was road rash involved ? 

[6adan]

My 70 JDM came new with a Dunlop F6 on the front and the K87 looks correct from what I remember.

[Retro Rocket]

He wanted to know what was original.  That was Chen Shin, not Bridgestone or Dunlop.  As far as the other post, I'm only aware of the IRC Tractor Grip that is still sold by Honda.  Nitto?  Perhaps if the wheel was upgraded from an 8" to a 10".

 Ask me how i know...?

How do you know .  Was road rash involved ? 

Not quite but almost, I had a CB450 given to me by my brother, I already had a 750/4, the 450 needed fork seals and a rear tire, i didn't have much cash so i bought one of the early Chen shin tires, it was the cheapest tire i could get, that should tell you something, and there was NO better Chen shin model tires at the time. After getting the waxy mold release of that tire it did nothing but slide as soon as anything but a gentle lean angle was involved, in the wet it was like riding on diesel, even though i had little money at the time, i cut the thing off the rear rim with a hack saw after about 100 miles use {if that}, it was without doubt the worst tire i ever rode on full stop, I had Pirelli Phantoms on my 750/4 and they were great...

[ekpent]

They were definitely a low cash tire back in the day.

[Retro Rocket]

They were definitely a low cash tire back in the day.

Tire..?  More like a bad tasting black donut....