Post up your ported cylinder Artwork

[I Know Something]

I'm new to this and basicly have a Dremel and home made attachments. It's better then expected for my own evaluation. It's a start.i have no idea what anybody else uses. I just know I cant afford it.

P.s. it's a 372XP big bore china thing. Cheap and useable.

 

[Canadian farm boy]

I'm new to this and basicly have a Dremel and home made attachments. It's better then expected for my own evaluation. It's a start.i have no idea what anybody else uses. I just know I cant afford it.

P.s. it's a 372XP big bore china thing. Cheap and useable. View attachment 233052

Looks good. Just make sure the exhaust port roof has some ark to it. It looks a little flat in the picture.

 

[Canadian farm boy]

Dolmar 5105

 

[Ketchup]

@Canadian farm boy, mind sharing the stock numbers for that 5105?

Top notch work, man.

 

[Canadian farm boy]

@Canadian farm boy, mind sharing the stock numbers for that 5105?

Top notch work, man.

I actually didn’t time the cylinder until after I had done the machine work.
So with just a gasket delete (.036) the cylinder timed at
76/135/113

 

[I Know Something]

Looks good. Just make sure the exhaust port roof has some ark to it. It looks a little flat in the picture.

I actually didn't touch anything but took the edge off of it. And thanks. I just enlarged it a bit was all. Still learning.

 

[Canadian farm boy]

MS880

 

[legdelimber]

Not bad for a dremel hehe

View attachment 230956 View attachment 230957

Picture is focused on the combustion chamber, so the flange area is a bit fuzzy of course and hard for my eyes to make out well.
It may just be the chamfer/bevel on the edge.
But is the spigot/extension a bit thin in a region on exhaust side?
How much does the cylinder rely on the spigot/extension to locate it in the cases?

 

[Mattyo]

Picture is focused on the combustion chamber, so the flange area is a bit fuzzy of course and hard for my eyes to make out well.
It may just be the chamfer/bevel on the edge.
But is the spigot/extension a bit thin in a region on exhaust side?
How much does the cylinder rely on the spigot/extension to locate it in the cases?

Had to read the post twice to understand what you meant. It's a good question. I don't think the skirts are a press fit into the cases anyway so it's not like they do the exact positioning. Personally I think the bolt holes are pretty exact and line things up best. In addition I move the piston to bdc when I'm seating the head so that helps a bit to align the head. Maybe someone else can chime in here too. The skirt was nicked a bit by the bridgeport because I cut the base freehand. But even so ...I'm pretty sure there are spots of full thickness.
Oh and on top of that ...this is a 52mm china head. So the skirts are thin to begin with. As the head gets bored wider....the skirts get thinner.

 

[Deets066]

 

[Bigmac]

Not a saw, but I figured I would post here, 86 Trx250r cylinder, 4mm stoker, stock cylinder

 

[Deets066]

Not a saw, but I figured I would post here, 86 Trx250r cylinder, 4mm stoker, stock cylinderView attachment 235756View attachment 235757View attachment 235758

Very nice work

 

[David Young]

I said WTF when I saw this intake port....View attachment 232890 I decided to fix that... well the best I could anyway.View attachment 232896View attachment 232895

Looks like some real hack work. Nice job on the save.

 

[huskyboy]

Looks like some real hack work. Nice job on the save.

Thanks David, I took a look at the piston when I got the saw and it was all scuffed up. I knew I needed to investigate further. Good thing I did! I feel good about the salvage of the cylinder and the saw runs good now. Should the owner have a problem I’ll find him a new cylinder.

 

[MG porting]

I'm new to this and basicly have a Dremel and home made attachments. It's better then expected for my own evaluation. It's a start.i have no idea what anybody else uses. I just know I cant afford it.

P.s. it's a 372XP big bore china thing. Cheap and useable. View attachment 233052

Looks good like Canadian farm boy said give the roof of the exhaust some arch.

 

[I Know Something]

He did. Got the comment well after it was put together and headed for work.

 

[Redfin]

Ive read gutting the stratos adds ALOT. I really hope I did this right.

 

[Redfin]

 

[Lightning Performance]

Ive read gutting the stratos adds ALOT. I really hope I did this right.View attachment 237392View attachment 237393View attachment 237394View attachment 237395

Is that a custom tank handle?

 

[Lightning Performance]

Not a saw, but I figured I would post here, 86 Trx250r cylinder, 4mm stoker, stock cylinderView attachment 235756View attachment 235757View attachment 235758

I second the very nice work.
You mean it started life as a stock cylinder.