The standard air filter in my blade engine needed replacing which I changed for a K&N panel filter as I had one in my garage.

My question is will the less restrictive filter cause me any engine running issues if I leave everything else as standard?

I appreciate your input!

Might well do. You might need to adjust the main jet needle....

ive just been going through the same process i bought a dna filter from ab performance slightly better than the k&n

ive just fitted a full dyno jet kit as getting it set up is a bit of a mission