questions

Hello my friends! i bought a husqvarna 350, it's a pre epa, no primer bulb, walbro carb, plastic intake clamp and it has the less desirable 44mm p/c. 1. Is the carb upgrade to zama a straight bolt on, or do i need to change something else. 2. If i delete the base gasget and do a muffler mod...

Ok I have a few questions before purchase. 1) In some pictures I see the decomp button on the left side or the right side of the saw, what does that mean (updated, other things changed ext?) 2) Muffler that comes with a new 6400 is now always with a cat? or do some have the SLR? 3) Is this...