For some reason the left side needle keep breaking not sure if I got the right side needle. Please help.

Maybe this manual should help you
http://freenecchisewingmachinefiles.weebly.com/uploads/1/8/7/3/18731174/necchi_service_manual_bu-bf_nova-mira.pdf

Check that the needle is in the right way - usually with the flat side away from you, but check your manual. While you have the manual out check that the bobbin is turning the right way too. Hope you fix it

First - check to be sure you have the machine threaded correctly - if the upper thread path is wrong it will break the thread every time you try to sew.

Try this link for more info:

Sewing Machine Thread Keeps Breaking

Here is a useful document of this machine:

http://www.singerco.com/uploads/download/1300_533.pdf

make sure the left needle is inserted correctly into the needle
holder, if you have flat sided needles make sure that the flat side is
put correctly to the side it suppose to be.
check the tension on the left needle, it may be too tight

the machine needs to be taken to a sewing machine shop & be
checked to see if it has jumped time,, a sewing machine shop
technican has the tools to retime the machine & the foot needs
to be filed to get rid of the burr on it.

Make sure, Joe, that your needles are pushed up into needle bar shaft a's high a's they will go. Although same length, the left needle will appear higher than the one on right side when properly seated and tighten clamp screw securely. Check Lower Looper for proper threading--thread delivery eye of lower looper to far left "hidden" from sight. Use looper tweezers and it helps threading it. The thread then gets pulled to right side and goes front to back of that hole in front of you on lower looper. Follow threading guide on the cover door to right of your serger. Hope this helps. Jimmy

Remove the presser foot and needle. Press the feed-dog drop button on the right-hand end of the machine, so that the feed-dogs drop below the needle plate. Press the back right-hand-side of the needle plate firmly and the front left side should pop up. You can then lift the plate out to clean underneath etc. When replacing, put the hole in the plate over the locating lug at the front-right corner and make sure the right-hand-side of the plate is down first, before pressing the left-hand side down into the grey surround. Be careful not to use excess force if it wont go, otherwise you could break the retaining spring. When done, dont forget to press the feed-dog drop button again and rotate the handwheel once, so that the feed-dogs come back up again.'

Hope that helps

It is usually in your top threading, make sure that your thread match in bobbin and top threads. Mixing sometimes causes a problem. Also make sure that nothing is tangled. Also, check your needle and put a new one in just to be sure, then check your manual for size of needle and what kind of project you are doing. Hope this helps.

There could be many reasons for this. Here are some things to check:

Keep an eye on the thread as it spools off the reel when you are embroidering. It's always tempting to watch the embroidery - which is incredible and fascinating and mesmerising - but that won't help you discover if the problem is how the thread is unwinding. Thread breakage is often caused by the thread not reeling of cleanly - it gets caught on a rough bit of the spool, or loops and gets caught in the tension discs or it flips out of the first thread guide straight after the thread spool. Some of the softer rayon emb. threads tend to fall off their reel and this can cause problems too. Check all those things. There are ways of dealing with any of these problems, just ask.

If it is polyester embroidery thread- when you are threading, pass the thread through the take-up lever (the hook bit above the needle that goes up and down) from left-to-right instead of right-to-left.

Put in a new needle. Make sure the needle is the right size for the thread you are using. There are special Embroidery needles, but I generally have no problems using a Universal 80/12 provided I am using regular embroidery threads (rayon or polyester, 40 or 35 wt).

Check that the bobbin thread is "clicked" into its tension slot.

Take off the needle plate and check that there is not a rough bit on the needle hole. There should be a nick at the front - that's normal - but any other roughness needs to be smoothed away with a crocus cloth (which I don't have, but find the rough side of a nail file followed by the smooth side does a reasonable job instead). While you've got the needle plate off, take out the bobbin case and clean all the fluff out of the area below the bobbin case.

Tip the machine back or lay it on its back and look up the needle shaft. Is there a pile of broken thread up there? It is really hard to get a good look up there, but you might be lucky. If there is some thread caught there, use long-nosed tweezers to get it out - or any other long, thin thing you can think of. Make sure your machine is turned OFF while you do this. Use a torch to help you see.

When you finish with one colour thread, cut it just after the reel and pull the thread end through from the needle. That way you are never pulling the furry ends of thread back through the tension discs.

Use a length of UNWAXED dental floss and clean out the top tension discs by running in several times from right to left through both top discs. Floss out the bobbin tension slot too while you are at it.

Is it just one particular thread that keeps breaking or any thread you use? Sometimes one thread is a rogue and you are never going to tame it. Cut your losses, save yourself some grief and throw it away.

Hope something here helps you.

Try rethreading the machine, and make sure the thread is not wrapped around anything. Then check the tension for the needles. Run a few inches of chainstich off slowly, while watching the thread and loopers make the loops over the finger. Your threads may be in the wrong position, or underneath the wrong parts to start.

Make sure that the needle is all the way up in the needle bar.
Unscrew until just loose, use finger nail or small screw driver to push up on the needle. The two needles do not line up.The right needle extends longer. Also, make sure that there are no burs on the needles and that they are straight and correct for your machine.