Author Topic: Obvious sillyness (Oldest tires & sprockets contest)  (Read 3344 times)

0 Members and 1 Guest are viewing this topic.

Offline Don R

  • My Sandcast is a
  • Really Old Timer ...
  • *******
  • Posts: 20,013
  • Saver of unloved motorcycles.
Obvious sillyness (Oldest tires & sprockets contest)
« on: December 31, 2023, 10:26:56 AM »
  I might need new tires on my bike, the tread is OK but the sizes are some sort of letter code and the date stamps only have 3 digits?  Do they really need replaced?
« Last Edit: January 10, 2024, 02:39:22 PM by Don R »
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.

Offline PeWe

  • Really Old Timer ...
  • *******
  • Posts: 15,629
  • Bike almost back to the 70's 2015
Re: Obvious sillyness
« Reply #1 on: December 31, 2023, 10:36:51 AM »
If rubber feels not dry without cracks, test ride next.
Might work fine for cruising around in legal speeds.

Inspired riding where your knees or foot pegs will go close to the asphalt, fresh tires a cheap ensurance.
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline BenelliSEI

  • Really Old Timer ...
  • *******
  • Posts: 10,030
  • 1969 cb750
Re: Obvious sillyness
« Reply #2 on: December 31, 2023, 11:06:06 AM »
For tires: “when in doubt, throw them out”.

Offline grcamna2

  • Not a
  • Really Old Timer ...
  • *******
  • Posts: 15,198
  • I love to restore & travel. Keep'em Going Strong !
Re: Obvious sillyness
« Reply #3 on: December 31, 2023, 03:05:11 PM »
For tires: “when in doubt, throw them out”.

 ;)  :)
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline 70CB750

  • Labor omnia vincit improbus.
  • Really Old Timer ...
  • *******
  • Posts: 14,806
  • Northern Virginia
Re: Obvious sillyness
« Reply #4 on: December 31, 2023, 03:59:15 PM »
If rubber feels not dry without cracks, test ride next.
Might work fine for cruising around in legal speeds.

Inspired riding where your knees or foot pegs will go close to the asphalt, fresh tires a cheap ensurance.

Done that to plenty of tires with no issues.  Your experience may be different. 
Prokop
_______________
Pure Gas - find ethanol free gas station near you

I love it when parts come together.

Dorothy - my CB750
CB750K3F - The Red
Sidecar


CB900C

2006 KLR650

Offline madmtnmotors

  • When did I get to be a
  • Really Old Timer ...
  • *******
  • Posts: 6,110
  • Sunny Central Florida
Re: Obvious sillyness
« Reply #5 on: December 31, 2023, 04:29:22 PM »
For those that don't recognize the silliness, four-digit date codes were implemented in the year 2000 making any tire with a three-digit date code well over twenty years old!

Good one Don! This also would have been appropriate in the joke of the day thread.  ;D
TAMTF...


Wilbur



Projects:
"Evolution": http://forums.sohc4.net/index.php?topic=100352.0
"P.O. Debacle": http://forums.sohc4.net/index.php/topic,126692.msg1441661.html#msg1441661
F2/F3 O-rings: http://forums.sohc4.net/index.php?topic=113672.msg1300721#msg1300721
Cam Tower Studs: https://www.mcmaster.com/#93210a017/=t19sgp
Clean up that nasty harness: http://forums.sohc4.net/index.php?topic=137351.msg1549191#msg1549191
http://forums.sohc4.net/index.php/topic,148188.msg1688494.html#msg1688494
http://forums.sohc4.net/index.php/topic,139544.msg1579364.html#msg1579364
                                          
Charging system diagnosis: http://forums.sohc4.net/index.php?topic=1012.msg8345#msg8345
Get the manuals: http://manuals.sohc4.net/cb750k/
The Dragon: http://forums.sohc4.net/index.php?topic=45183.msg1571675#msg1571675
Headlight Switch: http://forums.sohc4.net/index.php?topic=113986.msg1283236#msg1283236
Branden's leak free top end thread: http://forums.sohc4.net/index.php?topic=107040.0
Engine Lifting Made Easy: http://forums.sohc4.net/index.php/topic,58210.msg1684742.html#msg1684742
                                      http://forums.sohc4.net/index.php/topic,100352.msg1675840.html#msg1675840
Static and Dynamic Timing: http://www.hondachopper.com/garage/carb_info/timing/timing1.html
Airbox Gasket Replacement: http://forums.sohc4.net/index.php/topic,114485.msg1290000.html#msg1290000
"Café" : http://forums.sohc4.net/index.php/topic,84697.msg953814.html#msg953814
PD Carb Choke Linkage: http://forums.sohc4.net/index.php/topic,100352.msg1669248.html#msg1669248
                                    http://forums.sohc4.net/index.php/topic,110931.msg1248354.html#msg1248354
                                    http://forums.sohc4.net/index.php/topic,48858.msg515204.html#msg515204
Follow up on your damn posts: http://forums.sohc4.net/index.php/topic,144305.msg1791605.html#msg1791605
Taiwanese Cam Chain Tensioners:  http://forums.sohc4.net/index.php/topic,155043.msg1774841.html#msg1774841
Gumtwo Seat Cover: http://forums.sohc4.net/index.php/topic,164440.msg1897366.html#msg1897366
Primary Drive: http://forums.sohc4.net/index.php/topic,166063.msg1919278.html#msg1919278
Tank Latch: http://forums.sohc4.net/index.php/topic,165975.msg1919495.html#msg1919495
Shorten your forks: http://vintage-and-classic-honda-s.456789.n3.nabble.com/How-to-shorten-forks-td4042465.html DO NOT CUT THE SPRINGS!
Clutch How To: http://vintage-and-classic-honda-s.456789.n3.nabble.com/How-to-change-and-adjust-a-clutch-SOHC-td4040391.html
Late model K7/K8/F2/F3 front sprocket cover removal: http://forums.sohc4.net/index.php/topic,178428.msg2072279.html#msg2072279
630 to 530 conversion: http://forums.sohc4.net/index.php/topic,180710.msg2094423.html#msg2094423

Sent from my Tandy TRS-80!

Offline newday777

  • Really Old Timer ...
  • *******
  • Posts: 5,343
  • Avatar is my 76 K6 in Colorado w/Cody on back 1980
Re: Obvious sillyness
« Reply #6 on: December 31, 2023, 05:02:39 PM »
Hey I have a couple tires on the parts bikes with 3 digi dates on them.
Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline PeWe

  • Really Old Timer ...
  • *******
  • Posts: 15,629
  • Bike almost back to the 70's 2015
Re: Obvious sillyness
« Reply #7 on: December 31, 2023, 11:40:42 PM »
An old  bike with its original tires is worth more? ;D
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline Don R

  • My Sandcast is a
  • Really Old Timer ...
  • *******
  • Posts: 20,013
  • Saver of unloved motorcycles.
Re: Obvious sillyness
« Reply #8 on: January 01, 2024, 10:16:50 AM »
 These tires have white letter sidewalls, they are pretty fancy to be honest. The seller thought they might be original but I'm pretty sure they have been changed once. They did make it a few miles on my test ride.
 I did keep the original front tire off of my sandcast. it looks OK but has a flat spot from sitting a decade or two.
 Thanks Wilbur, I guess the sillyness wasn't as obvious as I thought. lol.
 
« Last Edit: January 01, 2024, 10:18:25 AM by Don R »
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.

Offline Don R

  • My Sandcast is a
  • Really Old Timer ...
  • *******
  • Posts: 20,013
  • Saver of unloved motorcycles.
Re: Obvious sillyness (Oldest tires contest)
« Reply #9 on: January 10, 2024, 02:23:52 PM »
 When figuring the sprocket ratio do you count where the teeth were, or only where they are?
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.

Offline Kelly E

  • Geriatric Hooligan
  • Master
  • *****
  • Posts: 2,384
Re: Obvious sillyness (Oldest tires contest)
« Reply #10 on: January 10, 2024, 02:28:06 PM »
When figuring the sprocket ratio do you count where the teeth were, or only where they are?

You'll have to count them, they're mostly there. ;D
Never Give Up - Never Surrender

The Rust Bros. Garage Collection
1974 Honda CB 550 K0                                            1971 MGB/GT
1975 Honda CB 400F Super Sport                          1972 MGB/GT
1977 Kawasaki KZ 1000 LTD                                   1985 GMC S15
1978 Kawasaki KL 250
1980 Suzuki GS 1100E
1982 Honda CB 900F Super Sport
1983 Honda CB 1100F
1984 Honda VF 700S Sabre
1984 Honda VF 1000F Interceptor
1990 Moto Guzzi 1000 Le Mans
1994 Kawasaki Concours ZG 1000A9
2005 Harley Davidson Fat Boy

Offline Don R

  • My Sandcast is a
  • Really Old Timer ...
  • *******
  • Posts: 20,013
  • Saver of unloved motorcycles.
Re: Obvious sillyness (Oldest tires contest)
« Reply #11 on: January 10, 2024, 02:31:21 PM »
 OK thanks.
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.

Offline CycleRanger

  • No comment about being an
  • Really Old Timer ...
  • *******
  • Posts: 5,449
  • Central Texas Shop Manual Advocate
Re: Obvious sillyness (Oldest tires & sprockets contest)
« Reply #12 on: January 10, 2024, 03:38:19 PM »
I recently pulled an original front tire off my 1971 CL350. Still had plenty of tread left.  ;D
I've also got a original Bridgestone Superspeed that came on a rear wheel I got from a '73 750.
It has about half the tread left. I should put it on ebay as "vintage". ::)
« Last Edit: January 10, 2024, 03:41:18 PM by CycleRanger »
Do you have a copy of the Honda Shop Manual or Parts List for your bike? Get one here:
https://www.honda4fun.com/materiale/documentazione-tecnica
CB750K5        '79 XL250s     CL350K3
CB750K3        '76 XS650      '76 CJ360T

Offline HondaMan

  • Someone took this pic of me before I became a
  • Really Old Timer ...
  • *******
  • Posts: 13,911
  • ...not my choice, I was nicknamed...
    • Getting 'em Back on the Road
Re: Obvious sillyness (Oldest tires & sprockets contest)
« Reply #13 on: January 10, 2024, 05:25:58 PM »
So...does that make this one a 16.75-tooth sprocket?
That will raise the RPM at hiway speeds...
See SOHC4shop@gmail.com for info about the gadgets I make for these bikes.

The demons are repulsed when a man does good. Use that.
Blood is thicker than water, but motor oil is thicker yet...so, don't mess with my SOHC4, or I might have to hurt you.
Hondaman's creed: "Bikers are family. Treat them accordingly."

Link to Hondaman Ignition: http://forums.sohc4.net/index.php?topic=67543.0

Link to My CB750 Book: https://www.lulu.com/search?adult_audience_rating=00&page=1&pageSize=10&q=my+cb750+book

Link to website: www.SOHC4shop.com

Offline ekpent

  • Really Old Timer ...
  • *******
  • Posts: 13,512
  • To many bikes-but lookin' for more
Re: Obvious sillyness (Oldest tires & sprockets contest)
« Reply #14 on: January 10, 2024, 06:03:36 PM »
My 1971 Suzuki T500 still has its original redline tires on it and only a couple thousand miles on it. Leaving them on for now since I still haven't decided if I want to keep or sell it. Already have had it a long time since 2017, tough decision when your a hoarder.  :D  Pic later when I change computers .
« Last Edit: January 10, 2024, 06:38:06 PM by ekpent »

Offline CycleRanger

  • No comment about being an
  • Really Old Timer ...
  • *******
  • Posts: 5,449
  • Central Texas Shop Manual Advocate
Re: Obvious sillyness (Oldest tires & sprockets contest)
« Reply #15 on: January 10, 2024, 06:55:46 PM »
That's a beauty!
Do you have a copy of the Honda Shop Manual or Parts List for your bike? Get one here:
https://www.honda4fun.com/materiale/documentazione-tecnica
CB750K5        '79 XL250s     CL350K3
CB750K3        '76 XS650      '76 CJ360T

Offline PeWe

  • Really Old Timer ...
  • *******
  • Posts: 15,629
  • Bike almost back to the 70's 2015
Re: Obvious sillyness (Oldest tires & sprockets contest)
« Reply #16 on: January 10, 2024, 08:39:28 PM »
That T500 is almost NOS! ;)
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline BenelliSEI

  • Really Old Timer ...
  • *******
  • Posts: 10,030
  • 1969 cb750
Re: Obvious sillyness (Oldest tires & sprockets contest)
« Reply #17 on: January 11, 2024, 06:24:23 AM »
Don…. I’ve only seen one sprocket that worn and threw it away so fast I have no photo!

Offline ekpent

  • Really Old Timer ...
  • *******
  • Posts: 13,512
  • To many bikes-but lookin' for more
Re: Obvious sillyness (Oldest tires & sprockets contest)
« Reply #18 on: January 11, 2024, 06:48:54 AM »
I bought a Kawasaki 750 4 cylinder 4 stroke once at a yard sale and it came with a new bearing because the guy said it had a clunk in the back. Well when I got it back to the shop and started looking it over the rear sprocket pretty much had no teeth and the chain was slipping. Guy must not have been to sharp to not notice !  I saved to somewhere in my shop for #$%*e and giggles.

Offline Don R

  • My Sandcast is a
  • Really Old Timer ...
  • *******
  • Posts: 20,013
  • Saver of unloved motorcycles.
Re: Obvious sillyness (Oldest tires & sprockets contest)
« Reply #19 on: January 12, 2024, 03:52:35 PM »
So...does that make this one a 16.75-tooth sprocket?
That will raise the RPM at hiway speeds...
I took a closer look 16.25 teeth.
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.

Offline Don R

  • My Sandcast is a
  • Really Old Timer ...
  • *******
  • Posts: 20,013
  • Saver of unloved motorcycles.
Re: Obvious sillyness (Oldest tires & sprockets contest)
« Reply #20 on: January 12, 2024, 03:56:39 PM »
 I had a T350 a while back but it was the opposite end of the spectrum from that T500. I'd like to get my brother an X6, he worked at an oldsmobile dealer that had suzukis for a while when they were new.
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.

Offline Kelly E

  • Geriatric Hooligan
  • Master
  • *****
  • Posts: 2,384
Re: Obvious sillyness (Oldest tires & sprockets contest)
« Reply #21 on: January 12, 2024, 05:58:35 PM »
Here's the sprocket that was on the 78' KL 250 when I got it. The bike has 15k miles on it and I think this is the original sprocket. ;D
Never Give Up - Never Surrender

The Rust Bros. Garage Collection
1974 Honda CB 550 K0                                            1971 MGB/GT
1975 Honda CB 400F Super Sport                          1972 MGB/GT
1977 Kawasaki KZ 1000 LTD                                   1985 GMC S15
1978 Kawasaki KL 250
1980 Suzuki GS 1100E
1982 Honda CB 900F Super Sport
1983 Honda CB 1100F
1984 Honda VF 700S Sabre
1984 Honda VF 1000F Interceptor
1990 Moto Guzzi 1000 Le Mans
1994 Kawasaki Concours ZG 1000A9
2005 Harley Davidson Fat Boy

Offline grcamna2

  • Not a
  • Really Old Timer ...
  • *******
  • Posts: 15,198
  • I love to restore & travel. Keep'em Going Strong !
Re: Obvious sillyness (Oldest tires contest)
« Reply #22 on: January 12, 2024, 06:32:39 PM »
When figuring the sprocket ratio do you count where the teeth were, or only where they are?

This sprocket is really worn;I've seen one in the past that was So badly worn that all the teeth were curved in one direction,like a circular saw blade.
The chain was just slipping over it every time the bike was shifted
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline Don R

  • My Sandcast is a
  • Really Old Timer ...
  • *******
  • Posts: 20,013
  • Saver of unloved motorcycles.
Re: Obvious sillyness (Oldest tires & sprockets contest)
« Reply #23 on: January 13, 2024, 02:06:37 PM »
 Here is an engine that I just opened. Has sat for so long it varnished inside but was awfully abused when it was running. 
 The pump screen was pushed in causing oil to go through it, I assume a lot of this crud happened sitting in the barn but the crank oil holes are plugged solid. No way did that happen while sitting. A chip was gone off of a piston, I think the oil pump ate it.
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.

Offline Don R

  • My Sandcast is a
  • Really Old Timer ...
  • *******
  • Posts: 20,013
  • Saver of unloved motorcycles.
Re: Obvious sillyness (Oldest tires & sprockets contest)
« Reply #24 on: January 13, 2024, 02:08:37 PM »
 The screen.
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.