Spuds Porting and Tuning Thread

[Joe Newton]

This weekend, I have been mostly porting a MS150, I would usually just stick the hole in the exhaust but this one wasn't running and the local dealer had said the bore was scored.

 

 

 

Admittedly, there was a bit of brown residue on the piston but it looked in good shape:001_rolleyes:

 

 

 

Stripped it down and it is TINY, I had to use the smallest diamond bur on it and be VERY careful not to go to far. The squish on the saw is tight so not much to be changed here.

 

 

 

The exhaust port was widened, the inlet port was lowered and widened significantly, the upper transfers swept back a little and the lower separator rounded slightly.

 

 

 

The ignition was advanced and the exhaust drilled.

 

 

 

It sounds a bit angry now and picks up a bit fast.

 

 

 

I am still playing with carb settings but I can now lean on it a bit without it bogging down in the cut.

 

 

 

Early impressions are good:thumbup:

 

 

Get a vid up!

 

I wonder how the minuscule cutting gear will deal with the upgrade in power.

[wyk]

Get a vid up!

 

I wonder how the minuscule cutting gear will deal with the upgrade in power.

 

That, my friend, is what she said.

 

Ahh yeahhh.

 

This week it's mostly alcohol on my bench. Spending the BDays in the Portugals.

[spudulike]

That, my friend, is what she said.

 

Ahh yeahhh.

 

This week it's mostly alcohol on my bench. Spending the BDays in the Portugals.

 

What a life, flitting between Madeira and Portugal:thumbup: Sounds a little easy to me!

 

Vid, will see what I can do. One really weird thing was the further the H screw is wound out, the faster it revs - hit 15,500 rpm at one stage, I think I need t take it all the way out and wind it in until the revs are right but at 5.00pm on a Sunday, didn't want to piss off my long suffering neighbours!

 

I always thought this saw was limited, no limits on this one:thumbup:

 

Interesting little project - I did what I knew would work and it seems to have done just that!

[JaySmith]

Recently sent a 200t to Steve to fix. Thoroughly recommend him, very good value for money and kept us informed what he was doing at every step and how much it was going to be. She's running like a dream now and means the 201 can go to the back of the lock up! Cheers for your help Steve.

[Stubby]

Recently sent a 200t to Steve to fix. Thoroughly recommend him, very good value for money and kept us informed what he was doing at every step and how much it was going to be. She's running like a dream now and means the 201 can go to the back of the lock up! Cheers for your help Steve.

 

Steve is now officially a legend in my book .

[MattyF]

Steve when you get some stickers made up ??

[Stubby]

Steve when you get some stickers made up ??

 

I suggested this a few years ago .....

[MattyF]

I know stubby I'm just reminding him 👍 he needs to have a design a logo competition, maybe the winner gets a works port job or some thing.

[wyk]

What a life, flitting between Madeira and Portugal:thumbup: Sounds a little easy to me!

 

Cheap and cheerful. Monaco was a bit out of the budget.

[spudulike]

Recently sent a 200t to Steve to fix. Thoroughly recommend him, very good value for money and kept us informed what he was doing at every step and how much it was going to be. She's running like a dream now and means the 201 can go to the back of the lock up! Cheers for your help Steve.

 

No worries Jay, glad you are happy, cheers:thumbup: