Derbi Hunter 70cc won't run correctly

hey guys i recently did a 70cc swap on my derbi hunter but I cant keep get it running correctly. during my first install of the kit i broke off a piece of the cylinder skirt but decided to install in anyway as it was only the very bottom part. I an it with the exhaust off which seemed to work fine the once I put the exhaust on and ran it for a longer period of time it got worse and worse until it could only idle and now sometimes it won't even do that. i think i might have an air leak in my cylinder. what do you guys think?

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Re: Derbi Hunter 70cc won't run correctly

Is this bait?

Yeah you might have an airleak somewhere

Tune is probably off.

Start from scratch and check everything

Timing - jetting - gaskets - torque

Re: Derbi Hunter 70cc won't run correctly

Tweaker trash /

This is the second cast iron kit I seen out of the box with a broken skirt

Re: Derbi Hunter 70cc won't run correctly

todd amundson /

Stick your mouth over the pipe header and blow! If there’s any resistance the pipes clogged. Don’t fucking cheat and use an air gun. It’ll show a false negative. Stick your nasty mouth on the header and blow. I’m not fucking around.

Re: Derbi Hunter 70cc won't run correctly

> todd amundson Wrote:

> -------------------------------------------------------

> Stick your mouth over the pipe header and blow! If there’s any

> resistance the pipes clogged. Don’t fucking cheat and use an air gun.

> It’ll show a false negative. Stick your nasty mouth on the header and

> blow. I’m not fucking around.

I want to see a video of you doing that . LOL

Re: Derbi Hunter 70cc won't run correctly

> todd amundson Wrote:

> -------------------------------------------------------

> Stick your mouth over the pipe header and blow! If there’s any

> resistance the pipes clogged. Don’t fucking cheat and use an air gun.

> It’ll show a false negative. Stick your nasty mouth on the header and

> blow. I’m not fucking around.

You gotta set the piston at bottom dead center if you're doing this with the pipe mounted on the cylinder though, otherwise you'll be blowing against a wall essentially

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