Husqvarna 365 SP Special / 372xp Compression & Squish measurement before porting & popup piston 

372XP chassis is famous for low compression. Around 140 is very normal. 0.040+ squish is normal from the factory for these.

You were out of camera view when you were yarding on the starter during your compression test but I thought I'd mention that if you weren't holding the throttle wide open while pulling you should probably consider it. Won't make a huge difference but if you're hunting those last few psi to get your saw over your magic compression number it'll likely help...

They are factory 135.

I would keep it 48mm I like the way they run better than the 50 or52mm

Apakah 365 bisa memakai cylinder piston 372 bos