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Mastermind Revisits The MS261CM Type II

paragonbuilder

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It's pretty much everything but the carb on this model. If you remove the divider from the carb it throws the low pressure signal off to the point that it doesn't run well.

So the carb as it comes is set up to have the proper signal with the divider. Upon removal there would be less air passing directly over the jets. Do you think enlarging the transition jets by a size or two would help the carb run better?

I'm assuming it runs fine at idle with the throttle plate directing flow over the idle jet, and WOT with plenty of air flow to pull fuel from the carb.

Thoughts?
 

paragonbuilder

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Thanks for sharing such detail Randy, other than the transfer slopes, the stock #s and squish seemed real good!

Your work, as always, looks excellent.

I needed some good news tonight, cause I also got some bad news. One of my old friends, a guy known as Wolfman, passed last night.

Back in the day, Wolfman worked as a bartender/bouncer at Dutchy's Den, the hottest spot in Peekskill, along with two of my other friends Baby John & Goon. All 3 were over 6' and 200 lbs. That place was my regular hang out till I got married, and I even had my first wedding reception there (we met there).

Wolfman had long blond/brown scraggly hair, and a beard to match and always greeted you with a smile. He subsequently worked for Metro North RR.

Baby John passed several years earlier, but Goon is still with us. Don't know what ever happened to Dutchy, but he was a larger than life person who treated everyone he knew like family.

At my 25th birthday party (my last before marriage), Dutchy and the boys all came, and when we killed the 2 kegs of beer, he called the bar and had them send more. We floated 8 keg that night, and I still run into people who talk to me about that party (two of my friends started a lawn mower in the living room).

When the State Police came to ask us to keep the noise down, the Trooper said "we don't want any trouble..." Goon stopped him right there and said "If you don't want any trouble, then leave". I intervened and told Goon to shut up and apologized to the Trooper. I guess he had sympathy for me cause he left us alone. But, it was a good party!

On another occasion, Goon got arrested for taking a Trooper's hat and not giving it back, he had to call for backup.

RIP Wolfman, you, and your big smile, will be missed.

My condolences Mike. [emoji19]
 

Mastermind

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So the carb as it comes is set up to have the proper signal with the divider. Upon removal there would be less air passing directly over the jets. Do you think enlarging the transition jets by a size or two would help the carb run better?

I'm assuming it runs fine at idle with the throttle plate directing flow over the idle jet, and WOT with plenty of air flow to pull fuel from the carb.

Thoughts?

I think it's best left as is. Period. The divider is not a restriction in any way, so why make it an issue?
 

Mastermind

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Strato theory of operation is tricky to explain. Pictures do a much better job.

If everything after the carb is gutted, then how is a divider in the carb changing or not changing anything? Plenty of time for mixing in the intake, jug, transfers, crankcase. And, the divider is no thicker than the throttle plates and shafts. So it's not a restriction. But, removing it throws the calibration off so much that it won't run well at all.

My point is, why make a issue out of something that is not an issue in any way?
 

Onan18

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If everything after the carb is gutted, then how is a divider in the carb changing or not changing anything? Plenty of time for mixing in the intake, jug, transfers, crankcase. And, the divider is no thicker than the throttle plates and shafts. So it's not a restriction. But, removing it throws the calibration off so much that it won't run well at all.

My point is, why make a issue out of something that is not an issue in any way?


Oh, everything else is gutted, I missed that part. I thought Jeremy was trying to understand why Stratos do what they do. Yeah, removing the divider from the carb is no bueno, throws the calibration all to heck and back.

My bad boss, I will go sit in the corner now. :calimero1:
 

SOS Ridgerider

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A friend of mine told me they used to do that to their MX bikes. I believe the idea is to carry more oil. They had a weird name for it. Can't remember.
From what I understand Honda is doing something similar to one of their new engines too.
 

Adirondackstihl

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A friend of mine told me they used to do that to their MX bikes. I believe the idea is to carry more oil. They had a weird name for it. Can't remember.
From what I understand Honda is doing something similar to one of their new engines too.
Never wanna do that to a cylinder.
But I have done it to an intake port.
Sorta like a golf ball. Creates less drag.
 
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