Now, to tune the weber 40 IDF Options

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I know it's been rehashed over and over again....

I have some questions on how to do it after futzing around in the garage trying to make SOMETHING happen.

I followed the carb clinic instructions to the T and I think something is adjusted wrong... Maybe you guys can help.

I have the idle speed screws to 1/2 turn past first contact with the arms

linkage disconnected

air bypass screws all the way shut.

all mixture screws out 1.5 turns

it'll start and run (slowly) and it'll get to what i think is around 450 rpm or something. really slow..

the only way I can get it to idle at 450 or so is by having the mixture screws in pretty far. two cylinders dont even react past a certain point! i can have them all the way in (lightly) and the engine doesnt change its note at all!

Please ask me questions so I can give the right info. I've never done this before but i'd like to believe these arent fiddly carbs.

When they say the engine should 'speed up' is it a really noticeable change? because mine's so subtle as to be not affected.

please help guys!

these are brand new carbs from jake's store. I have the box that says what the jetting is. i'll post that soon.

what are 'jets' and what do they do?

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Mark, I've tried to set my timing with the mallory as close as I can to 27* BTDC at 3200rpm, but the problem is I cant bear the sound of the engine when it's revved that High with these unbalanced carbs. i feel like i'm gonna kill the engine. the timing my be very off because I need someone to hold the gas down while I lean in with a timing light and do my twist & shout on the dizzy.

Is it possible it's my timing being too far off?
I was sitting on the john and that occurred to me that my timing may be off or my idle jets are too big.

all my best ideas come to me in the latrine, and I KNOW i'm not alone in this.

Also, is the engine speed up VERY noticeable for other people? I'm having trouble understanding how to tune this the way it's going with the screws not affecting the idle.

also, thanks mark for 'splainin what the jets are. In 2 stroke RC carbs you dont get those... Just a high needle, low needle and idle stop. if you're lucking with a slide valve carb you get a mid needle too! i love slide valve carbs! why dont cars get them?