Just finishing the Huztl 372 kit + 52mm P&C, everything went together great. With one little exception, the chain brake would not disengage. After taking the handle off, we had to work hard with a pair vise grips to engage / dis engage the brake. The spring was so stiff that it felt like the plastic brake handle was going to break before disengaging. We cut and taper ground the spring, we took off 1 1/2 coils, which lowered tension, now the plastic handle works great!
Maybe Huztl upgraded to air rifle springs? lol's
If the spring won't bend sideways during the install, it's a real tough pita to get installed and the brake handle won't move when your done, you too may have the upgraded spring!
Just mixed up some more gas and fired her up the first time, six pulls and she popped, on the next pull she ran. With the big bore and muffler mod, she sounds pretty bad to the bone.
Time to tune her up and Huztl up some firewood!