twin disscussion

[BriggsTwins]

PB blaster and let it soak!!! that will break it loose. be careful otherwise your gonna be drilling and retapping that hole

 

[Rotore]

I got them apart already took me 10mins. Btw what's the slide on it for?

 

[BriggsTwins]

which slide, the thick round one, or the flat one

 

[Rotore]

Flat one?

 

[modelengineer]

I discovered that my twin has only been firing on one cylinder, so the vids really show a 250cc single... It's all good now though.

In the carby the round one is the butterfly, the flat one is a vacuum operated slide. AFAIK it's used instead of an accelerator pump, but instead of injecting more fuel, it stops the throttle being opened really quickly which would cause the engine to run lean.

 

[Rotore]

So its the slide opens with the vacuum created by the engine and draws it's own fuel instead of using a pump?

I see no point in using it now....

 

[Kaptain Krunch]

From what i understand its just basically to make the throttle response very even and smooth, you will get better performance from a flatslide or even a roundslide, there just way to complicated IMO, why have a slide, butterfly, AND choke. Mikuni slide carbs just have a slide, they dont even have a choke.

 

[Rotore]

Oh ok I get where your going with that

 

[modelengineer]

Mikuni slide carbs just have a slide, they dont even have a choke.

My Mikuni's have a butterfly, a slide, and a choke but the choke is (I think) another fuel jet which opens. It's not another air restrictor.

 

[Kaptain Krunch]

You must have CV carbs if they have a butterfly and a slide. I'm talking about plain slide carbs, which used a cable operated slide and have no choke, just a fuel enrichment circuit (which is basically another jet like you said that is opened when you pull the choke lever/cable).

 

[Rotore]

Shoul I keep or remove the govener on the twin?

 

[BriggsTwins]

keep it, do you really need the rpms? when you can make it work with a governed speed

 

[Rotore]

I don't think I still have the springs or linkages so yea

 

[BriggsTwins]

then no worries

 

[Rotore]

Lmao i'm really about to drop a grand on this engine

 

[BriggsTwins]

better get it a nice home then

 

[Rotore]

It's moré of a long term build now

 

[BriggsTwins]

just like me.... got a welder though, that was my milestone to move on with the build