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Startup revs out of control


footballnick17

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Hi guys, im having an issue with my startup, whenever i start it up it revs out of control and im forced to stop it because it seems like its going full throttle

Info:

Twin SU Carbs

Smog Equipment removed

L24 Block

N42 Head

And sometimes it revs all the way, stops, air pops out of the carb then it revs back up again almost to red line and continues

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I'm on my phone so not seeing the video. 

You appear to have put new boots on the choke cables. Maybe the wires are too short. If I remember right from the locking barrel at the ends it should measure 2" to hold down for the cable. When full choke is on it measures 1 1/4". 

Also feel the bottom and see if the nozzles are up or down. I'm just guessing at things that I've had trouble with. 

Good luck.

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I'm a very frugal thinking guy so if it were mine I would try and pinch the supply fuel line  coming out of the fuel filter to lower the psi before buying new parts. Or make a sharp bend by hand in the supply hose and see what effect that has. You could do that while it's running at high rpms. See if it comes down. Is it the OE mechanical pump off the cam nose or do you have an electric pump.

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