I use aftermarket seals from Weedeaterman.com, highway pistons too, they run fine.
On the first one I did I used all Stihl parts. Right now I have an OEM 390 and a 290/390 with a Highway piston in a NWP jug. The 290/390 has more compression.
Also it has a bridge over the transfers, poorer finish work in the ports though. 20 minutes with a grinder fixed that.
So folks show up to dicker for the OEM MS390 then I tell them have an Asian conversion for a little less $. They leave with the conversion every time.
Stihl puts plastic bearings in the sprocket and on the crankshaft ends..... Asian sets are steel for less.
Sent from my SCH-R530C using Tapatalk
On the first one I did I used all Stihl parts. Right now I have an OEM 390 and a 290/390 with a Highway piston in a NWP jug. The 290/390 has more compression.
Also it has a bridge over the transfers, poorer finish work in the ports though. 20 minutes with a grinder fixed that.
So folks show up to dicker for the OEM MS390 then I tell them have an Asian conversion for a little less $. They leave with the conversion every time.
Stihl puts plastic bearings in the sprocket and on the crankshaft ends..... Asian sets are steel for less.
Sent from my SCH-R530C using Tapatalk