Hi Proptop,

I purchased a Webra 50 Speed two weeks ago. Brand new, I couldn't realize this scratchy sound of the bearings because it was too difficult to turn the engine by hand (piston tolerance). After running 1.5L FAI Fuel (20% Castor, 80% Methanol) through it this weekend, the engine seems to be on the way to run in as it should, but when I turn the engine by hand between both "compression points", now I realize that sound in the bearings. When the engine is running, everything seems/ sounds OK. I decided to continue running in until either sound disappers (good luck) or it gets really bad (shi..)

This engine has huge compression. Seems not to need Nitro at all. Engine vibrates in transition with glow plug hotter than Novarossi 5 at the moment.