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Author Topic: New Spockets Break In Procedure.  (Read 535 times)

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Offline BenelliSEI

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New Spockets Break In Procedure.
« on: January 28, 2023, 06:43:13 AM »
In another discussion about chains and sprockets, I suggests that when in doubt, replace the chain and both sprockets. Most would agree. “Hondaman” popped in at one point and suggested something I never thought of, and well worth considering! I’m about to fit sprockets and chain to my KLR650 and will take this extra step. See his actual post below:

A word of advice/experience:
All of the rear sprockets we see today are molded, not cut (if steel). This leaves a fine gritty surface in the teeth, which will wear off in 50 miles and then jam the new chain. This then wrecks the new sprockets, quickly.

To solve this: run the OLD chain on the NEW sprockets for 50-100 miles, first. Then install the new chain. You will get twice as much chain life from that chain if you do this simple 2-step dance.
« Last Edit: January 28, 2023, 06:47:52 AM by BenelliSEI »
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Offline MauiK3

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Re: New Spockets Break In Procedure.
« Reply #1 on: January 28, 2023, 07:05:05 AM »
Great tip! I did not know this.
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Online newday777

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Re: New Spockets Break In Procedure.
« Reply #2 on: January 28, 2023, 07:05:17 AM »
Thanks for posting this John.
I saw it when Mark put that in the other post.
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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 BenelliSEI

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Re: New Spockets Break In Procedure.
« Reply #3 on: January 28, 2023, 07:21:49 AM »
News to me too, but all makes total sense! A few extra steps, but worth a try.
« Last Edit: January 28, 2023, 09:34:09 AM by BenelliSEI »
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Offline PeWe

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Re: New Spockets Break In Procedure.
« Reply #4 on: January 28, 2023, 09:29:54 AM »
Hondaman has mentioned this in older threads.
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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 rocket johnny

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Re: New Spockets Break In Procedure.
« Reply #5 on: January 28, 2023, 02:35:11 PM »
this old dog learned a new trick !
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Offline BenelliSEI

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Re: New Spockets Break In Procedure.
« Reply #6 on: January 28, 2023, 02:48:01 PM »
Quote from: rocket johnny on January 28, 2023, 02:35:11 PM
this old dog learned a new trick !

Apparently it’s possible! That’s what so entertaining about this forum.
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Offline seanbarney41

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Re: New Spockets Break In Procedure.
« Reply #7 on: January 28, 2023, 02:53:19 PM »
Not sure, but I think Sunstar brand sprockets are machined, not cast.  I have definitely seen what Hondaman is talking about with cheaper sprockets.
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Offline RAFster122s

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Re: New Spockets Break In Procedure.
« Reply #8 on: January 28, 2023, 03:04:55 PM »
Thanks for sharing this John, and of course HondaMan (Mark). Will keep this tidbit in mind.
« Last Edit: January 28, 2023, 05:09:13 PM by RAFster122s »
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Offline Stev-o

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Re: New Spockets Break In Procedure.
« Reply #9 on: January 28, 2023, 03:47:20 PM »
Quote from: seanbarney41 on January 28, 2023, 02:53:19 PM
Not sure, but I think Sunstar brand sprockets are machined, not cast. 

Here's one of those "How it's Made" videos, not familar with MTX, but apparently they are available in OZ...

https://www.mxonlineaustralia.com.au/mtx-front-sprocket-17t-honda-cb750-f-rc42-1992-2002-10-mw3-17

Looks like the bike in the shop is a Honda?  [not the one outside]
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'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline PeWe

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Re: New Spockets Break In Procedure.
« Reply #10 on: January 29, 2023, 08:43:06 AM »
Front sprocket has been up too in same discussion.
The design of the teeth. One brand has longer and differently designed, maybe JT.
I think Sunstar was the better one.
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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 Tracksnblades1

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Re: New Spockets Break In Procedure.
« Reply #11 on: January 29, 2023, 12:59:22 PM »
+1 SB41

Most of the steel single sprocket I’ve used look like they started life as plate steel.  Punch pressed, punch press lightening holes, counter machined and trued, hobbed teeth, and drilled mounting holes..
YouTube has several videos of the different makes  subcontracted to overseas manufacturers.
I’ve used a lot of sintered sprockets in industrial applications in under 1725rpm speeds Generally a lot less when mounted on the output of a gearbox or variable drives. Striking any type of arc on sintered steel you’ll know it’s not plate..
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