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If this thing is leaking where are the most popular failure points?

Yeah, it was night and day difference after I set the floats) (I learned the hard way what improperly set floats can do on my raptor 660). But I think I'm going to try to jet up on more size, 35 pilot and a 260 main just because I'm still a little lean. Also, I've looked at a dozen "diy leak...

Can the needle position cause a lean condition? I'm set at the 3rd clip down from the top. I reset the floats and the 250 doesn't cut out anymore. Still working on building a leak tester!

Here are my reeds (you tell me if they look good), put a new bolt in the intake. Haven't done a leak down test yet, but it's on my to do list. Tried the 250 and it was shuddering with acceleration. Put the 230 back in and that cleared up. The plug is a dark/golden brown when I can do the best...

Alright, lol I'll pull it apart and see if I can fumble through making one of the leak down testers

What goes in that hole?

Is the thing on top idle as well? Also, it seams to still be running a little lean, if i threw in a 240 or 250 main at 500 above sea level with a DG exhaust with the lid on, would that be too rich? Would it be ok with lid off?

This is my carb.

I found this on Google, this is exactly what my carb looks like minus the cap.

Yes, that's exactly what it is. I'm just having trouble with it not returning back to a normal idle, it just stays high. The plug is a perfect shade of light brown after 2 chops. But I can't get this idle figured out. Then again I'm not really sure where to adjust it.

I will grab a pic of it Friday when I'll have time. But it is a mikuni 28mm with the toes unit deleted, a new cap and the adjuster thing on top.

So I dumped out all of the old gas, replace it with some premium with amsoil 2 stroke stuff. Cleaned the carb (can't believe how easy it is compared to my 660). Dropped a new plug in it, and she's running much better now. No how do I adjust the idle on this thing? Ps I just want to thank all...

Any ideas as to what carb is in it? I couldn't find anything by searching "MEC" carbs or anything.

Larry, are you saying the thing on top of the carb is a cable slack adjuster or that the cable adjuster is my problem? And yeah I'm going to pick up some 2 stroke yamalube tonight and fresh gas so I know what's in it...

What worries me the most is that it isn't smoking at all.

I simply need to figure out what kind of carb I have on it. When I looked I couldn't find kiehn or mikuni written on it anywhere, just "MEC". I'm going to get into the carb either today after work or Friday and see how it looks. It probably needs a thorough cleaning regardless.

So far, my plan is to get some oil and fresh gas, pick up a couple plugs, pull the carb, check jet sizes, clean it out a bit, do a plug chop and go from there.

Hi all, I just picked up an 03 blaster for my gf and it appeared to me as a great deal. Clean, oil system deleted, DG exhaust, moose racing foam air filer (lid on), a carb that says "MEC" on the side, and the bike appears to have the tors system deleted (there is no bulky thing by the carb)...