Now, to tune the weber 40 IDF Options

[purple]

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?

[McMark]

Even at a rough, but equal adjustment on the four throats, you should run pretty smooth at high rpm (no misfiring). Grab a set of ear muffs, a friend and an adjustable timing light and get the timing dialed in. Revving an unloaded motor (i.e. not in gear) is pretty safe. Holding an unloaded motor at 3500 rpm isn't going to break it. Yer gonna have to get used to that. (IMG:style_emoticons/default/wink.gif) 914 motors like to rev, this isn't a Honda Civic that you can short-shift at 3000 rpm around town. You'll be revving to 4500 all the time while driving.

[purple]

Even at a rough, but equal adjustment on the four throats, you should run pretty smooth at high rpm (no misfiring). Grab a set of ear muffs, a friend and an adjustable timing light and get the timing dialed in. Revving an unloaded motor (i.e. not in gear) is pretty safe. Holding an unloaded motor at 3500 rpm isn't going to break it. Yer gonna have to get used to that. (IMG:style_emoticons/default/wink.gif) 914 motors like to rev, this isn't a Honda Civic that you can short-shift at 3000 rpm around town. You'll be revving to 4500 all the time while driving.

are you serious? 4500? christ.

I shift my mini at 3000 rpm to keep fuel economy up.

i feel like i'm going ballistic if i rev the mini up that high, like i'm trying to race people. what if my hydro cam balks at 5000rpm?

btw, the adjusted valvetrain really sounds good now. it's all quiet and such. starting to sound like a little german sewing machine, like the mini engine.