Blood, sweat, tears & beers . . .

Drilling the slide and cutting the spring will make the slide unstable...it will flutter or hunt causing surging....that's also dyno jet kit advice,only they say cut 2 coils....you may be able to get away with a drilled slide if you use the full length stock spring
I've seen more CV's f'd up because they took that advice than not...
Try the spring in the CV performance kit,I think it's a lighter spring,if it works great if not you may need a new slide

Thanks, buddy. When I put the thing back together, should I lightly lube the slide? When I took it out it felt a little oily.
I'm also very curious to find out what size jets come with the upgrade. As I understand it, there are two sizes of each jet.
Oh, and another thing: the jet needle has 6 rings in the end with a c-clip around the 4th one from the top (see pic). I assume this is correct?

Shouldn't need lubing....7/64ths is stock port size...Yep someone was modifying it...that's not a stock needle,so not sure what kind of jets are used,doesn't look like a dyno jet emulsion tube(a good thing)stock CV or CV performance jets don't fit Dyno Jet kits

In the back of my mind lurks the question: Since this carb has been passed up for something else, maybe this carb wasn't doing it's job? Man, I sure don't want to end up with all the problems like I had with my old butterfly carb!
However, I'm forging onward. CV upgrade will go in, carburator will go on, and I pray it will start up and work like it's supposed to.

That needle is what you call an adjustable needle. That is what my indy wants to use in my carb but am fighting it. The premise behind that needle is so you can "adjust" how far the taper sits in the jet which will either slow or quicken the transition from your pilot to midrange circuit. (Based on where the e-clip is located).

Thanks, Johnny. Guess I'll leave it where it is - here is another variable I know nothing about. It will be a miracle if the thing works right when I get it all together.

Back to jets - here is a sketch of the logo on the bottom of one of the jets. Had to use TWO magnifying glasses to see that! Might be a clue to - what . . .? I suspect they are not stock jets.

Why would anyone drill the slide vacuum hole larger? They say to do this (someone already has) but no explaination why.

The claim is you get quicker acceleration and throttle response,but in reality all you get is a gas hog and the strong possibility of surging at steady throttle positions...
When you get the CVP jet kit,make sure they will fit in the emulsion tube...Dyno jet kits have a different thread pitch than stock CV jets and CVP jets...
The "E" clip in the middle slot is usually the one to try first with an adjustable needle...

I see. If I get surging later on at steady throttle positions I'll know to get another slide! I think whoever drilled that 9/64" hole, drilled it too big - I've not seen on any other forum where the hole is larger than 1/8". Also not good getting bad gas milage. With a 3 1/2 gal. gas tank I hope to be getting around 140 miles per tank.
When I begin the install on the CVP jets, providing I use them, I'll be very careful the threads match up. I hope a #50 comes with the kit. I think The #165 I have will be okay. I have open pipes with 10 1/2" baffles. Should be interesting to see how it all works together.

The point is being that the slide should not be drilled at all. when I recent tore my carb apart I started to look at all things that could be causing my "rich" condition. I think the largest drill that would fit into m vacuum port was a 3/32. The kit that you have in may not necessarily be a Dyna-Jet kit either. It could be a kit from Cycle Werks. My indy told me that if I use the kit that he wants I will have to change the emulsion tube because the jets that they provide will not work with stock tube.

Egg zactly...set it and forget it....best all around carb on the market IMHO....

joshbob I'd say that 9/64ths hole is why the guy got rid of the carb

Very possible. I don't know if I should get a new slide or what. If so, I wouldn't know if they are interchangeable. Don't know what year carb I have . . . or what model bike it came off . . .

I know it's not an '88 because it has an accelerator pump.

I'm going to contact Ken.

Doesn't really matter what year or model,only minor changes made to them over the years,but the part number is usually on the side....anyone of the slides from '90-up will work...
The float was changed in '93 (I think) to the flat type that you have in yours

Okay, boys. I PM'd Ken and am waiting to hear something.

I just talked to the guy who rebuilt my motor. We discussed the leaking crankshaft oil seal problem I have. He tells me I should reverse the next seal I put in - in other words - with the spring side of the seal to the inside. Another piece of advise was to get a seal from Cometic because they make a better seal. I've contacted Cometic and am waiting for a reply . . . .

Has anyone out there used JB Weld to connect a CV carb to a billet flange adapter? Will it hold the carb & air cleaner up?

It might,but I'm not sure I'd take a chance on it....When you get you're shovel fired up I think it's going to shake a bit and if the JB cracked or a piece broke off, you know where it's gonna get sucked into(Murphy's Law) then you'd be tearing it down again...
IMO you'd be better off making up a solid mount to mount to the air cleaner backing plate and that would hold the carb on...

Here's a pic I "borrowed" of a stock CV A/C backing plate mounted...
Do you have the air cleaner backing plate and mounting hardware from the butterfly carb??
Some guy's also mount a piece of flat stock with off sets from the case center bolt to the backing plate...
Check the underside of the front rocker box for a threaded hole,that's where the front mount bolts to...

JP Cycles sells that front bracket....