« previous next »
Pages: [1]   Go Down

Author Topic: Stupid PO trick?  (Read 2333 times)

0 Members and 1 Guest are viewing this topic.

Offline Rgconner

  • Hot Shot
  • ***
  • Posts: 674
Stupid PO trick?
« on: October 14, 2013, 11:11:07 AM »
So I finally got around to putting on my 520 conversion on the 550.

I discovered the FRONT sprocket appears to be a 520 already, but the back was still a 530?

Stupid PO trick?

Or is there a stock reason for the differences?
Logged
1975 CB550K aka "Grease Monkey"

Offline Don R

  • My Sandcast is a
  • Really Old Timer ...
  • *******
  • Posts: 20,234
  • Saver of unloved motorcycles.
Re: Stupid PO trick?
« Reply #1 on: October 14, 2013, 11:22:29 AM »
That's a new one on me.
Logged
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 Bodi

  • Really Old Timer ...
  • *******
  • Posts: 5,702
Re: Stupid PO trick?
« Reply #2 on: October 14, 2013, 04:26:57 PM »
No reason for the difference except maybe stupidity, incompetence,  or desperation. The 520 sprocket will work with 530 chain (not vice-versa!) and either the PO didn't have a clue and bought the wrong size (stupidity), a parts dude got him the wrong part (incompetence), or the old sprocket was really really bad and a 520 was all that could be found (desperation).
 
Logged

Offline lucky

  • Really Old Timer ...
  • *******
  • Posts: 6,715
Re: Stupid PO trick?
« Reply #3 on: October 14, 2013, 07:12:07 PM »
You can get away with it for a while but it will eat up the chain and sprockets.
520 is the pitch between centers.
 So by using a #530 the pitch is longer.
Logged

Offline lucky

  • Really Old Timer ...
  • *******
  • Posts: 6,715
Re: Stupid PO trick?
« Reply #4 on: October 14, 2013, 07:13:45 PM »
It is like telling someone to never weld on a gas tank that has had gas in it.
They will tell you that so and so does it all the time.

Then one day you realize you have not heard from them for a long time.
Logged

Offline tomkimberly

  • Expert
  • ****
  • Posts: 1,113
Re: Stupid PO trick?
« Reply #5 on: October 14, 2013, 07:27:27 PM »
#$%* happens, live with it.


Tom K.
Logged

Offline 754

  • Really Old Timer ...
  • *******
  • Posts: 29,050
Re: Stupid PO trick?
« Reply #6 on: October 14, 2013, 07:38:36 PM »
The second number in chain is WIDTH not Pitch
 520 is 2/8 or an inch wide
 530 is 3/8 of an inch wide

Looks like the PO did you a favor
Logged
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline Rgconner

  • Hot Shot
  • ***
  • Posts: 674
Re: Stupid PO trick?
« Reply #7 on: October 14, 2013, 07:48:44 PM »
Well, looking at the number on the wheel, it says it is a 320!

15 tooth.

Replaced with a 520 18 tooth. Gonna be a different bike, that is for sure!
Logged
1975 CB550K aka "Grease Monkey"

Offline KJ790

  • Enthusiast
  • **
  • Posts: 248
Re: Stupid PO trick?
« Reply #8 on: October 14, 2013, 07:58:03 PM »
Quote from: lucky on October 14, 2013, 07:12:07 PM
You can get away with it for a while but it will eat up the chain and sprockets.
520 is the pitch between centers.
 So by using a #530 the pitch is longer.

Not really, a 520 and a 530 are the same pitch. As mentioned already, the difference is in the width. You can get away with a 530 chain on 520 sprockets alright, but there isn't really any reason to unless you cannot find a 530 sprocket anywhere (which isn't the case for these bikes...). Chances are the PO had no idea what he was doing and got lucky that he mixed parts in a way that doesn't cause any issues.
Logged
The most dangerous part of a motorcycle is the nut that connects the handlebars to the footpegs.

Offline Rgconner

  • Hot Shot
  • ***
  • Posts: 674
Re: Stupid PO trick?
« Reply #9 on: October 14, 2013, 08:05:47 PM »
You know why he is named Lucky?

he is lucky if he gets it right.

I looked, there is no chain size I can find that is "320" so it is likely just a part number of some sort.
Logged
1975 CB550K aka "Grease Monkey"

Offline cougar

  • Hot Shot
  • ***
  • Posts: 409
  • Stamping Ground, Kentucky U.S.A.
Re: Stupid PO trick?
« Reply #10 on: October 15, 2013, 10:02:18 AM »
^^^^ ;D ;D ;D ROFLMAO THANKS "Rgconner"   ...cougar...
Logged
I'm not prejudice, I'll weld anything that pays! Knowledge that is shared is Never Lost!!   Right is right, wrong is wrong! The truth is the truth and a lie is a lie! DEAL WITH IT ACCORDINGLY !!!   I HATE "DIAL-UP"

Offline lucky

  • Really Old Timer ...
  • *******
  • Posts: 6,715
Re: Stupid PO trick?
« Reply #11 on: October 15, 2013, 12:18:09 PM »
Quote from: 754 on October 14, 2013, 07:38:36 PM
The second number in chain is WIDTH not Pitch
 520 is 2/8 or an inch wide
 530 is 3/8 of an inch wide

Looks like the PO did you a favor

Thanks for that detail info. I was told that number WAS the pitch.
Thanks for educating me on that.
Logged

Offline lucky

  • Really Old Timer ...
  • *******
  • Posts: 6,715
Re: Stupid PO trick?
« Reply #12 on: October 15, 2013, 12:20:06 PM »
Quote from: Rgconner on October 14, 2013, 08:05:47 PM
You know why he is named Lucky?

he is lucky if he gets it right.

I looked, there is no chain size I can find that is "320" so it is likely just a part number of some sort.

Everybody is wrong sometimes.
I admitted my mistake .

I usually use a #530 chain with a #530 sprocket so I have not run into any problems.
« Last Edit: October 15, 2013, 12:23:14 PM by lucky »
Logged

Offline Rgconner

  • Hot Shot
  • ***
  • Posts: 674
Re: Stupid PO trick?
« Reply #13 on: October 15, 2013, 11:46:28 PM »
Putting a 18 on it really changed the nature of the bike.

It is not nearly as fast off the line, but that is not as important to me. I would buy a crotch rocket if it was... take off from first is a lot less thrashy, and I hit 40mph at about 8K, so redline is probably 45ish now.


What is nice is that 55 mph is now about 3800K in 5th, and 65mph is around 5K. Much easier on the engine and me to be 1200 rpms lower. Vibration is not nearly as bad.

4th is now just under where 5th was, and 5th is now a suitable 6th. With the 650 cam in the bike, top end power is still good. I can crack it open at 65mph and it goes to 70 or 75 right quick.

4th is now a better climbing gear and I don't think I have to thrash between 4 and 5 so much on the local roads.

17 might have been a better choice, but this is fine for now.
Logged
1975 CB550K aka "Grease Monkey"

Offline dave500

  • Really Old Timer ...
  • *******
  • Posts: 17,052
  • WHAT?no gravy?
Re: Stupid PO trick?
« Reply #14 on: October 15, 2013, 11:53:28 PM »
the stock 17/37 setup gives around 5000 rpm at 100kph(60mph).
Logged

Offline trueblue

  • A person who has had many interesting experiences, some of which are true, is known as an
  • Old Timer
  • ******
  • Posts: 3,124
Re: Stupid PO trick?
« Reply #15 on: October 16, 2013, 04:03:07 AM »
Where did you get your 520 sprockets?
Logged
1979 CB650Z
Nothing can be idiot proofed, the world keeps producing better idiots.
Electronic Guages for your SOHC 4

Offline Rgconner

  • Hot Shot
  • ***
  • Posts: 674
Re: Stupid PO trick?
« Reply #16 on: October 16, 2013, 07:32:30 AM »
http://sidewindersprockets.com/index.html

call up and talk to the man, he will get you what you need.

Be prepared to wait, he has to send them out for machining and if it is an aluminum sprocket then it has to be re-hardened.

The chain he provides is really nice too, worth getting unless you already have some 520s O-ring lying around.
Logged
1975 CB550K aka "Grease Monkey"

Offline trueblue

  • A person who has had many interesting experiences, some of which are true, is known as an
  • Old Timer
  • ******
  • Posts: 3,124
Re: Stupid PO trick?
« Reply #17 on: October 17, 2013, 01:29:36 AM »
Thanks mate, I'll get onto him ;D
Logged
1979 CB650Z
Nothing can be idiot proofed, the world keeps producing better idiots.
Electronic Guages for your SOHC 4
Pages: [1]   Go Up
« previous next »