Recent content by SquareCup

Thanks for the feedback I think I will slap the 50lbs on tonight and see how she runs , will report with the results :) I might upgrade the cam / flywheel just not sure if it’s necessary for what I’m doing

but they still end up floating and I’m trying to avoid that . Would 50lb spring be too much for stock parts or would 35lb be better ? It’s hard to find 35lb springs for a gx390 -predator 420cc lots of 50lbs but is that too much for stock parts or will everything be fine?

Since I removed the governor from the internals the valves like to float at higher RPMs I am trying to avoid the floating .

Hello all currently building a engine for the mini bike my current project is a predator 420cc I hade removed the governor and am currently am working on the valve springs my main concern is I hade purchased 50lb valve springs as an upgrade from the stock springs is 50lbs too much? Should I of...