Mikuni on Briggs 5HP

[solomon]

It is about 32mm (inside diameter) and it attaches with a hose.
How do i install on my briggs 5hp flathead?

 

[EagleTalons]

That is way too large for your briggs...

 

[solomon]

well i have googled and thier are people that use 40mm on these 5hp engines. Anyways the carb on the spare 5hp i have is ****ty as balls. So i want to experiment. What should i do to mount it?

 

[EagleTalons]

Those are heavily modified and good luck getting it to run smoothly.

Here is a good guide to making a manifold.

I think you can cut the carb in half for an adapter to the hose.

 

[freakboy]

u would need to have huge *** ports both sides a high *** lift cam.

 

[anderkart]

I agree, Its too big.
If you already have the carb and just wanna experiment with it anyway... you'll probably find that while riding your kart, opening the throttle past 1/2, 2/3 or maybe 3/4 will actually make the engine loose power.

If you run into this, you could just adjust your throttle cable/pedal-stop to only open the carb as far as it still runs strong. Using a correctly sized carb would still be better but this will basically be making your carb work more like its smaller. If that needle on your slide has multiple mounting positions, adjust it so the needle is sticking out of the slide as far as it can. This will help lean the carb out a bit.

Mikuni sells jets for tuning so you could also do some plug readings: http://www.google.com/search?source...lz=1T4DMUS_enUS221US222&q=reading+spark+plugs and then rejet if necessary to get that carb dialed in better for your engine.

 

[anderkart]

I think you can cut the carb in half for an adapter to the hose.

Cool idea man.

 

[jr dragster T]

That carb is wayy too large and will be a bear to ever get it to run right. And No, I highly doubt there is a 5 hp Briggs&Stratton engine running a 40 mm carb. Heck for that matter even a Blockzilla 3 racing motor, A 40 mm carb is way too much. The Blockzilla 3" runs a 33-36 mm carb and that's a real racing engine. The stock intake port on a 5 hp is around 23 mm and the intake valve is like 22 mm.

 

[freakboy]

come to think about it. i think my racin mower carb is 40 mm aka 4 cm it dont seem to big i got a demo saw carb here for a tiny demo saw that the carb is 20 so it might work

 

[solomon]

well im going to a michine shop on friday (my brother inlaw works thier) and i can do anything thier for free. So im goin to port out the intake as far as it goes and then make an adapter for the carb. Im also gonna shave down the block and mill the head make valve clearance. Maybe even make a header. I will also make an air filter adapter what else should i do?