Honda CB750 Sandcast

Original-looking tires

vince ciotti

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Need a set of tires for my Sandcast, VIN #378. Hate to put modern-looking tires on it. Anyone find tires any that look like the originals: ribbed front and flat back?

Thanks!

Vince Ciotti


Wayne

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Vince
Did the originals look like mine? It's a NITTO SAFTEY NT-7S 350-19 4 Ply rating Nylon.

Avon Speedmasters look pretty close I think.

[size=


Nielsen

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I have used:

Dunlop 325Hx19 (54H) GOLD SEAL F11
Dunlop 400H x 18 (64H) GOLD SEAL K87 MKII-M

 :-\


kp

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markb

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Sorry for posting on an old thread.

I'm looking at getting a set of Dunlop F-11/K-87 from Yamiya for #97.  Except for the Dunlop brand the front tire doesn't look much like original ribbed look.  This is probably the cheapest option except for the outrageous shipping and happens to be what Vic World uses on his restorations.

Also looking at the Bridgestone Accolade AC03/AC04.  The front is more more of a ribbed look but I don't like the rear so much.  I don't understand the size description.  Does anyone know if they fit?  More expensive than the Dunlops but available domestically I think.

The Continental RB2/K112 in my opinion look the most like original but the most expensive and I think I would like to stay with either the Dunlop or Bridgestone brand.  Both are listed in the parts book but was there one or the other that was fitted to the early sandcasts?

I also like the looks of that Avon front tire but I didn't see a rear one that I like.  I don't think I want to mix and match brands.  

I guess my question in all this is what tires can I put on #97 that will be generally considered acceptable?  Any opinions?  I am ready to buy soon.

Mark
« Last Edit: June 02, 2015, 01:19:59 pm by markb »
Mark B
1969 CB750 sandcast #97 restored - Sold Restoration thread link
1969 CB750 sandcaxt #576 - Sold
1969 CB750 sandcast #1553 - Sold
1969 CB750 sandcast #1990 - Sold
1969 CB750 sandcast #5383 restored - Sold Restoration thread link
1970 CB750 K0 restored - Sold
2010 H-D Tri Glide Ultra Classic (Huh?)


Steve Swan

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So, i just rec'd from Yamiya the F11/K87 combo week b4 last. http://www.yamiya750.com/index.php?main_page=advanced_search_result&search_in_description=1&keyword=dunlop  

Entire rear tread pattern is about as close to correct original appearance as one could dream for.  Front zig/zag pattern is awful, imHo.  and for average daily riding, fwiw, these Dunlop tires are worthless, they are a 1700 mile tire at best.  i've got 1400 miles on the K87 on 2157 and it has about 1/8" center tread remaining.  the front has also appreciably worn, more than one would expect a ft.tire to wear in 1400 miles.

Below are new Bridgestone Accolade 02/03 ft/rr tire combo i just took off 232 last week.  i bought these around 2006.  The front rib is not accurate but FAR better than the F11.  The rear pattern is good on the sides and awful down the center.  The front has the new sizing on the wall of tire.  The sizing on rear tire is the old decimal.   But, they are Bridgestones....

100/90-19 = 3.25-3.50x19.  So you know what size you are purchasing, use a tire size conversion table - http://www.webbikeworld.com/Motorcycle-tires/tire-data.htm

imHo, the Accolade 02/03 tires are as decent looking as the F11/K87 tires and both the right size for a restoration.  the Accolade rear tread pattern is as much a downer as the front tread pattern on the F11.  the little diagonal rain grooves on the Accolade front are only mildly detracting.

early parts book calls for Bridgestone tires.  i know the experts say Dunlops were also fitted.  

when it comes to restoring, i guess we don't live in a perfect world, at least when it comes to tires.....  so, it boils down to restorer's preference.

as nice as you are making 97, Mark, i'd scout ebay morning, noon and night for an acceptable original set.  A K1 i'm restoring still has the original front BS and it's pretty much gone with nearly 6k miles on the clock.

my understanding, the Accolades are no longer being mfgr'd....?   the Accolade front i have is model 02; rear is model 03.  If you can still get Accolades, Mark, do let me know.  sounds like they must be since you reference Accolade models AC03 (ft?) and AC04 (rr?)  so i am guessing the AC 03/04 have superceded the 02/03 series.

going on http://www.bridgestone.com/products/motorcycle_tires/products/accolade/ one can see the diffs between tires.  My 2006 purchased Accolades clearly have tire model of 02 and 03 on the tire; no "AC" on tire.  i note the BS website show an AC03 which looks like my 02 and AC02 appears to be like my 03 tire.  

That AC03/AC04 combination looks about the best i've seen.....  Appears neither are exact in original tread pattern but as a pair, both are closer than the other tire pairs.

And agreed, Continental's on a CB750, #97 would be jibber-jabbering auf Deutsch.


4pots1969

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I remember that at the time in 1969 all bikers said that the tires mounted on the CB750 were real soaps!
So why do you absolutely put these tires?
And that's why I opted for the Dunlop TT100 GP which will give him a little sporty look while retaining the spirit of the 1969/1970.
The look of this tire is very beautiful on the Honda CB750...

Gerard
« Last Edit: June 06, 2015, 10:50:59 am by 4pots1969 »


Steve Swan

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Agreed, Gerald !  Those TT100's were the best tire in their day.  i rode a lot of miles on TT100's.

http://en.wikipedia.org/wiki/TT100_%28motorcycle_tyre%29

Knowing Mark, i'm guessing he could not live with TT100's on his bike....   ;D  ???

It would make 97 look too much like my 1974 Commando    :o


4pots1969

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Steve, your Norton Commando is superb and the TT100 tire him doing very well... Super Look!!
« Last Edit: June 02, 2015, 03:35:39 pm by 4pots1969 »


markb

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as nice as you are making 97, Mark, i'd scout ebay morning, noon and night for an acceptable original set. 
I have looked some.  Even if some could be found that look OK I can't imagine they would be rideable.

Steve, thanks for the thoughtful post.  It sound like we're on the same page.  I guess it's going to come down to the BS or Dunlop. 

Knowing Mark, i'm guessing he could not live with TT100's on his bike....   ;D  ???

You're right Steve.  Good tires but too far out of place for me.  :)
Mark B
1969 CB750 sandcast #97 restored - Sold Restoration thread link
1969 CB750 sandcaxt #576 - Sold
1969 CB750 sandcast #1553 - Sold
1969 CB750 sandcast #1990 - Sold
1969 CB750 sandcast #5383 restored - Sold Restoration thread link
1970 CB750 K0 restored - Sold
2010 H-D Tri Glide Ultra Classic (Huh?)


Steve Swan

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yeah, between the D's and the B's, i went with the D's.  But, i had not seen the AC03/04, despite my looking...  yet, none of these tires are perfect.  2015, that'd be too much to ask.

i will say though... the AC03/04 combination looks about best to my eye.  Better tread pattern overall than the Dunlops, imHo.  but there's probably the new sizing markings on the B's.  That K87 is about as perfect as one can get.  but, that F11 is pretty blinding.

let us know what direction you choose.


Steve Swan

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Ho !!!  that AC04 appears to come only in one size...... ???   130/80x18 = 5.00/5.10x18

the AC02 does come in 4.00x18.  

a reasonable combination could be an AC03 front and an AC02 rear...  appears would be pretty mcuh same as my 2006 Accolades, 02/03....

i don't know if Accolades are even available any longer.  if i understood correctly, when i was inquiring to availability, my parts source told me Accolades are nla.


markb

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Yikes!  I saw both the ACO3 and ACO4 listed on the Yamiya site and assumed that were suitable replacements.  However if you check out this link you will find that they say the tire is "thick" and you have to remove the chain guard.  :o  ::)
http://www.yamiya750.com/index.php?main_page=product_info&cPath=246_251_184_90&products_id=957
Mark B
1969 CB750 sandcast #97 restored - Sold Restoration thread link
1969 CB750 sandcaxt #576 - Sold
1969 CB750 sandcast #1553 - Sold
1969 CB750 sandcast #1990 - Sold
1969 CB750 sandcast #5383 restored - Sold Restoration thread link
1970 CB750 K0 restored - Sold
2010 H-D Tri Glide Ultra Classic (Huh?)


markb

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There are some AC03 tires available on ebay.  The AC02 doesn't appear to be available anywhere.  For looks the AC03 would look good on the front and the Dunlop K87 would look OK on the back but then you have the mixed brands.  Would that be a no-no?
Mark B
1969 CB750 sandcast #97 restored - Sold Restoration thread link
1969 CB750 sandcaxt #576 - Sold
1969 CB750 sandcast #1553 - Sold
1969 CB750 sandcast #1990 - Sold
1969 CB750 sandcast #5383 restored - Sold Restoration thread link
1970 CB750 K0 restored - Sold
2010 H-D Tri Glide Ultra Classic (Huh?)


Steve Swan

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to my way of thinking, mixing tire brands would be a no-no because the factory would not have sent out a machine with mixed brands.

all things discussed and considered, imHo, the F11/K87 combination, is the closest thing available to original.  i'm feeling good having sprung the bucks for them on 232.  And, Vic uses them.

The Dunlop TT100's were available in 1969 and are today still a damn good tire.  However, i believe the TT100 comes no smaller than a 4.10 size.  And, the TT100 did not come from the Honda factory.  Other than that, the TT100's available today are really really excellent copies of the original TT100 tire.

if you ride 97 any distance, i promise you'll be dismayed to watch the rear literally wear before your eyes.  They ARE a 1700 mile tire.  if a person put 2k miles on them, you'd be down to or close to the cords.  But then, Chris would like to lead you to believe we were riding 2157 MotoGP style with victory lap burnouts.....  ;D ;D ;D ;D