Just purchased carb kits/ accelerator pump kits off eBay and notice needle orifice is 3 times larger in diameter than original. If I use the needle that came with this seat, will it work OK?. If not, where is a good source of the correct kit for the Tilotsen 120C carbs? Also I noticed the accelerator check valve spring was missing. Can I use a ball point pen spring? The diameter is perfect. I wonder what will happen if this check valve is left out? I would guess they are very easy to lose and easier to overlook.