What's on your bench?

[redlight066]

Another saw I'm not porting. 064 with new oem 660 jug.

Hahahaha!! Clean port work as always. Thanks for posting yet another saw you’re not porting.

 

[Bigmac]

It does look like the intake valve maybe kissed the piston. Small mark on the intake edge. May have to pop them out quick too and make sure ther not bent.
It was the exhaust rocker arm that broke.

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Looks like the exhaust may have hit too, I put solvent in the port to check for leaks at the valve seat, I would check both they need to hold solvent and you should be able to blow compressed air at the valves and not see bubbles in the port, I wound bet the intake is bent and probably the exhaust too

just as an FYI I test brand new heads and machine shop fresh head too, it amazing how many of them leak!!

 

[Bigmac]

Yes, thanks.

Would you care to post timing numbers?

Finish it up and double checked the numbers 187° exhaust and 126° transfers, and .043 squish, it’s a mid-range port, should have good bottom end and decent over-rev, I like up to 190° and 130° max for and all around powerband. He is heavier and rides tight trails, I think this will smoke most cr500’s and be lighter, it going int an 02 cr chassis

got the piston mods done, I drill holes to lube the bridge and edge of the exhaust port between the sub exhausts, the piston comes with marks to drill, but the port is too wide to work with there index makes so I put them were needed, I also modify the boost window to make it more directional. Also put oil holes inline with the ring stops, I notice wear there on these big bores so I add themhere is a stock piston next to the big bore

Stock and big bore jugs
The big bore cylinder is o-ringed and has replaceable domes in the head

 

[merc_man]

Looks like the exhaust may have hit too, I put solvent in the port to check for leaks at the valve seat, I would check both they need to hold solvent and you should be able to blow compressed air at the valves and not see bubbles in the port, I wound bet the intake is bent and probably the exhaust too

just as an FYI I test brand new heads and machine shop fresh head too, it amazing how many of them leak!!

I will check the valves tomorow with solvent and a little air For leaks. I may need some more help from you if you dont mind giving some more advice.

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[Bigmac]

I will check the valves tomorow with solvent and a little air For leaks. I may need some more help from you if you dont mind giving some more advice.

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Absolutely!

 

[tickbitintn]

Finish it up and double checked the numbers 187° exhaust and 126° transfers, and .043 squish, it’s a mid-range port, should have good bottom end and decent over-rev, I like up to 190° and 130° max for and all around powerband. He is heavier and rides tight trails, I think this will smoke most cr500’s and be lighter, it going int an 02 cr chassis

got the piston mods done, I drill holes to lube the bridge and edge of the exhaust port between the sub exhausts, the piston comes with marks to drill, but the port is too wide to work with there index makes so I put them were needed, I also modify the boost window to make it more directional. Also put oil holes inline with the ring stops, I notice wear there on these big bores so I add themView attachment 210561View attachment 210562here is a stock piston next to the big boreView attachment 210563

Stock and big bore jugsView attachment 210564 View attachment 210565
The big bore cylinder is o-ringed and has replaceable domes in the head

2 stroke porn!!!!!

Nice stuff. [emoji106]

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[Dub11]

Another saw I'm not porting. 064 with new oem 660 jug.

View attachment 210484 View attachment 210485 View attachment 210486 View attachment 210487 View attachment 210488

Dude that jug is possessed !!!!! It jumped on your lathe then fell on the spinning thing a couple times!!!!

Burn some sage to remedy that *s-word.

 

[Bigmac]

Dude that jug is possessed !!!!! It jumped on your lathe then fell on the spinning thing a couple times!!!!

Burn some sage to remedy that *s-word.

Thats the docs secret....crazy possessed jugs make for good working girls....I mean work saws

 

[Dub11]

Thats the docs secret....crazy possessed jugs make for good working girls....I mean work saws

I guess Helga needs all the help she can get.

 

[Bigmac]

I guess Helga needs all the help she can get.

He isn’t taking new port work so it has to be magic

 

[WillG]

455 rancher x torq getting some love. New carb, fuel filter, purge bulb, spark plug, and a deep cleaning. New carb, bulb and filter are done. Need to clean, reassemble and test in the next day or two.

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[WillG]

Where should I start out with the carb needles? It's an aftermarket carb.

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[MustangMike]

I'm not familiar with the setting for this model, but since no one else has responded, usually 1 full turn out on the low and a little over 1 full turn out on the high will get you to a starting point.

 

[WillG]

I'm not familiar with the setting for this model, but since no one else has responded, usually 1 full turn out on the low and a little over 1 full turn out on the high will get you to a starting point.

Thanks Mike

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[Black Dog Chainsaw]

Old orange top 61 reborn as a 272xp.

 

[RI Chevy]

Where should I start out with the carb needles? It's an aftermarket carb.

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If it is an AM Chinese carb, I have experienced a bit different. They do not usually have the H-1 L-1 presets. They are usually more. Based on a Stihl 036 AM Carb.

 

[WillG]

If it is an AM Chinese carb, I have experienced a bit different. They do not usually have the H-1 L-1 presets. They are usually more. Based on a Stihl 036 AM Carb.

It is. Will see where it's set at out of the box and go from there.

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[RI Chevy]

I think my L was 1.5 turns out and H was almost 2.5 turns out on the AM Definitive Dave carb.

 

[ranchdadmike]

Where should I start out with the carb needles? It's an aftermarket carb.

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2.5 H / 1.5 L is what I see the factory settings were. Might be different with an AM carb

 

[WillG]

2.5 H / 1.5 L is what I see the factory settings were. Might be different with an AM carb

I'm going to see what it's set at now. I'll try the 2.5 and 1.5 to start.

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