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Discussion Starter · #1 · (Edited)
Is there any?? on the DS650 CV Carb 42mm this what they do:

Throttle Slide
This is where I have gone and a few of you will get nervous.
On the bottom of the slide are 2 vacuum ports.
I drilled 2 extra vacuum ports. Starting with a small size and testing.
The size I ended up with was .125 for all 4 vacuum ports.
At this size I could get the slide to rise all the way up, even with the lid off.
You need to measure and drill the extra ports in the same relationship as the first 2, just
on the other side.
The surface is not flat so use a sharp pick to start a pilot. Drill first a 1/16 hole.
Turn slide over and look for best location. If hole is not centered between ribbing, you can install 1/16
drill and side cut to best position. Then final drill with .125. Stock ports just need to be re-drilled.

I was just asking since I read so many mods for the stock intake system.
 

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Discussion Starter · #2 ·
Ofcourse I didnt do any of this on my DS, just went with a TM48
 

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I think one of the kits requires drilling the vac port larger--Most of the guys cut about 3/4" off the spring and don't enlarge the vac port.

Kenny
 
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