The hunt for more power :)

[maicoman009]

Before I would EVER spend 10,499 bucks on a big bore 2-stroke "AND NO PUN INTENDED"it would have to be a European 2-stroke & definetly NOT Japanese!

[riffraff]

darn tootin 'bout that Maicoman, and that price is before taxes, doc fees and delivery I bet

[RedFoxCR]

Who in the world knows why do Keihins have an electric valve? As far as i know it opens at some RPM and gives engine some more fuel. I tried shortening it onto a battery and it opened and closed successfully, whatever polarity i used. But i can't understand if it works or not on a working engine. So, here's the deal.  lets install a small battery and a button on the bar. When the button is pressed, the valve is opened. And it''l  be possible to add some fuel whenever it's needed. 

[Chokey]

The Power Jet works exactly the opposite of what you describe. It's a normally-open solenoid. It delivers extra fuel to supplement the main jet when the engine is running in the meat of the torque curve to prevent a lean condition under heavy loads. At a programmed rpm, the ECU energizes the solenoid to shut off the extra fuel to lean the mixture out slightly for better top-end over-rev. If you disconnect the wire to the Power Jet, it will remain open. The only difference you will notice is a small loss of over-rev.

[2T Institute]

+ 1 on that.
Power jets were devised to split the main jet circuit, so you could have good drive while on the needle and not go rich at peak, then someone found the more rpm the more fuel the power jet delivers, hence the soleniod cut.
Tip No1 leave it to the cdi as your going to be to busy to put your finger on a button to cut it

[RedFoxCR]

Damn! I'm an idiot!  I took it apart and it seemed like the solenoid OPENS that stuff when connected to a battery... You sure, buddy???
So, can i enrich the mixture on the top end a bit, eg by the float adjustment and the n connect that valve and have no smoke and good responce?

[TMKIWI]

Dont try to adjust the float to correct mixture problems.
Always use jets to do the job.

[ford832]

Dont try to adjust the float to correct mixture problems.
Always use jets to do the job.

Sorry,my eyes aren't what they used to be.Did you just say "get Jetz to do the job"?

[TMKIWI]

 

[graham472]

If you think its lean on top put a bigger main jet in it. Have a go, you wont blow your motor by richening it up. You'll know if it's too rich cause it will run like shit. One way to learn about jetting is to change them.

[RedFoxCR]

But i was running great on the jet that already was installed, just one day i was cleaning the carb and messed up everything. The problem is the float, not the jet. I raise the very fuel level - and the engine suffocates with petrol. The jet is surely enough.

[MyckMcClung]

And worth every penny. did you see how much they want for the KX250?? OMFG!!!!