Topic: What are the stock sleeves made of?? Any heat treatmed made to them??

[Lykowsky]

Hi, sorry for rubbish question.

I'm looking for any information about material which stock cb500/550 liners are made of, being on the path and looking to coat my cylinder bores after excesive rebore <3mm >i have came to the point when I'm in doubt.

I haven't a clue what them sleeves were made of and or any heat treatment were made to keep good hardness, but due to the fact that ussualy casted cylinder sleeves from that era were keeping constant hardness through the material so that amount of rebore work will not affect reliability of the engine. I want to run standard wiseco chrome plated piston rings.

I'll really appreciate any infos about heat treatment as well as material used.

Thanks
Lykowski

[Doctor_D]

IIRC, the cylinder liners made from spun-cast iron.

[mick7504]

Here is some more material info from LA Sleeves site.

http://www.lasleeve.com/master.html

There are three different materials that L.A. SLEEVE uses for custom sleeves.  The first and most popular is the Moly 2000 chrome-moly iron.  This material covers all applications from hi-performance to small engine.  Moly 2000 iron is available in all sizes and is the material chosen for ninety percent of all sleeves made.  Unless otherwise specified we make custom sleeves from this material.The second material is ductile iron (also known as Nodular).  This is a high tensile strength, air quenched iron material and is used for specific hi-performance applications, such as fuel blown motors.  Sleeve availability is limited to a small range of available casting sizes.The third material available is aluminum, A355 centrifugally spun or A6061-T651 aluminum.  Sleeve sizes are very limited.  Also, aluminum sleeves are only made for applications where plating is required.

[Lykowsky]

Are you shure about them chromoly liners??

I'm not shure that they were putting any technoligicaly better sleeves than just iron in that time.
Can you put some more info?

[Sam Green Racing]

Rob, if you think about it, most blocks are just cast iron. I'm reffering to none Aluminium (Aluminum for our American Bros) blocks that don't have liners. When it comes to making liners, you can't beat a good cast water drain pipe to make them from. Old Victorian cast pipes were best, around 100 years old. (this is not an April fools joke) I have drain pipe sleeves in one of my twins that has aly barrels, I had the 125 stock Honda sleeves taken out and replaced with the drain pipes to take it out to over 150cc, never had any probplems.

Sam. WA3 6JR.

[MRieck]

Mec made his own sleeves from old pipe

[Sam Green Racing]

I can see dozens of members becoming scrap iron merchants in the pursuit of Victorian cast iron drain pipes, we've let the cat out of the bag now Murphy.

Sam.

[Big Jay]

It is not chrome moly as in Bar stock. It is a cast iron with some additives.

[Lykowsky]

does anybody know them were heat treated somehow?? or just PURE cast Iron were used??

[Sam Green Racing]

Just cast iron Rob.

Sam.

[turboguzzi]

Just cast iron Rob.

Sam.

+1

[Doctor_D]

IIRC, the cylinder liners made from spun-cast iron.

Sheesh... correct answer was the first one.

[Sam Green Racing]

Yes Dave. sounds like Rob wanted a dozen answers so he could be sure.

Sam.

[754]

It is not just cast iron, it is a select  ALLOY.

 For those of you in the "just cast iron" camp, start using henry abe piston in your turbo and blown motors.. hey, all the pistons are aluminum...

 LA Sleeve should be able to fix you up, or mod sleeves from another bike.
 

[Sam Green Racing]

OK Frank, it's not JUST cast iron today but it was years ago and I'm sure drain pipes are nothing special but they work fine, I was referring to the fact that they are not specially treated once cast.

Sam.

[Lykowsky]

Thanks for straightening that all up  , so i'll send them just to rebore and put those super fast pistons back together.

Big thanks oiiii

Rob