6 cube 066

[Deets066]

Thanks for taking the time to share Deets.

Very cool.

You'll get it figured out.

Threads like these are needed.... to learn and stuffs.




























And to help me figure out why muh chits broked

 

[Mastermind]

Threads like these are needed.... to learn and stuffs.




























And to help me figure out why muh chits broked

Threads like this make me wish I hadn't ended up with no time to play with my own toys.

 

[Deets066]

Threads like this make me wish I hadn't ended up with no time to play with my own toys.

I'm sure you'd really like to spend your free time building chainsaws huh?

 

[Sty57]

Did you happen to check what the skirt to wall clearance was before running it?

 

[Deets066]

Did you happen to check what the skirt to wall clearance was before running it?

I remember getting theses measurements when I built the head. Just don't know what they are. Need to check again

 

[Moparmyway]

Mic the piston and see if its still round. You have to break them in slow and put them through some heat cycles when new.

Would it be better to heat them in an oven so they get a few thermal cycles .......... somewhat before running ?

 

[Sty57]

I remember getting theses measurements when I built the head. Just don't know what they are. Need to check again

I'd be curious to know if there is a difference between the stock cast piston and the forged one on the skirt clearance. Forged should be a little loser compared to the cast if I remember right.

 

[Moparmyway]

I'd be curious to know if there is a difference between the stock cast piston and the forged one on the skirt clearance. Forged should be a little loser compared to the cast if I remember right.

These fancy blue ones are slightly looser in the bore

 

[Sty57]

Would it be better to heat them in an oven so they get a few thermal cycles .......... somewhat before running ?

I have no idea on that, I'm just thinking about how there broke in on sleds and wheelers.

 

[Sty57]

All that stuff was liquid cooled too, so being air cooled may throw another curve into the brake in......just kinda spit balling here.

 

[Sty57]

These fancy blue ones are slightly looser in the bore

I believe thats why you see coatings on the skirts on them to help stop the scuffing on startup. I know the skiddo / rotax pistons have been like that for a long time.
Sleds are really easy to seize when you don't let them warm up good and just blast on them.

 

[Sty57]

A lot of guy I know have used these guys for sled cylinder repair.
http://www.millennium-tech.net/index.php?osCsid=1mtqbvefq325brin2pkk4d2sr2

I don't know if they'll do a small saw jug or not. I know most of these places won't do jugs that don't have a removable head on them.

 

[Deets066]

I believe thats why you see coatings on the skirts on them to help stop the scuffing on startup. I know the skiddo / rotax pistons have been like that for a long time.
Sleds are really easy to seize when you don't let them warm up good and just blast on them.

I've changed about 7 pistons in my sled, never had a issue with cold seize or breaking in. I'd put em in and ride like normal


Which was rather fast. Lol

 

[Deets066]

A lot of guy I know have used these guys for sled cylinder repair.
http://www.millennium-tech.net/index.php?osCsid=1mtqbvefq325brin2pkk4d2sr2

I don't know if they'll do a small saw jug or not. I know most of these places won't do jugs that don't have a removable head on them.

If I get it replated, I'll send it to US Chrome

 

[Sty57]

If I get it replated, I'll send it to US Chrome

From what I've been told, the guys that started Millennium all worked at US Chrome and started there own shop. There just down the street from each other.

 

[Deets066]

I used to get my snowmobile jugs welded, bored, and plated for $80

 

[spencerpaving]

I did a 62mm cylinder this winter...ran strong first couple pulls then it went down...the plating chipped around the top of the cylinder...i figured the clearances for the head were too tight where it protruded into the cylinder....it did not have a oring seal...i have to send it out again

 

[Redfin]

Be careful when you jump back and forth, you could accidentally slip and crack your noggin, if you're not wearing your helmet.

Deeter always has his hemet on.

 

[Deets066]

Deeter always has his hemet on.

 

[Deets066]

I did a 62mm cylinder this winter...ran strong first couple pulls then it went down...the plating chipped around the top of the cylinder...i figured the clearances for the head were too tight where it protruded into the cylinder....it did not have a oring seal...i have to send it out again

How much clearance do you think is sufficient?