MOPED ARMY

i have never done a puch intake, but the others i have done i just got started enlarging with drill bits, started with a small bit and kept working up till i almost had no wall left, paper thin, in theory you want the entire thing the same inner diameter

I've been looking for the best tool for the job (I've tried a few differnt tools with less than stellar results) and am ordering a brush type brake cylinder hone to try on another one. They're 180 grit, so they should be able to take a mm or so out of these soft metal intakes.

Hands-on tools has them (www.handsontools.com) They're only about $15, so it's worth a gamble.

Homo depot? Sounds fabulous.

You probably got the stone type hone. The brush types are flexible, and come in different sizes, down to (I think) 12mm.

I thought about the drill routine, and I'm still tempted to try it, but I'd really like to match the tube ID to the carb ID precisely. I know it's probably overkill, but I'm becoming anal in my old age.

this is true, I use to do the same thing when I was 17.

the pinky never fails.

Okay i did the conversion so if i wanted a 15mm intake that would mean i would have to have a drill bit that is 0.5905512 inches. Which 9/16 isnt close and 3/4 is way to big. Could I just use a 5/8" drill bit because its 0.625 inches? That would make it more like 16 millimeter = 0.6299213 inches. Is my reasoning way off, and am I sounding crazy or does that make sense. Can someone let me know. What would be the downside of having an intake that is too big? I would think the more room the more gas or maybe Im wrong. Some one let me know before I go to homo deopt and get me a 5/8" drill bit. Thanks!!!

It doesn't matter if your intake is larger than carb diameter. You can make some very creative and effective intakes with copper plumbing pipe and silver solder. A charming thing about silver solder is that the flanges on each end can be brass, steel or copper.