RE: HPI K5.9 Problems
I know there's guys that have their issues with the K5.9 but I love mine and I'll surely get another or just have the sleeve pinched when it's time.
I'm on gallon #11 and it's still running strong.
I also know several guys that have the K5.9 and they all love the engine.
When properly sealed it's a great engine for an RTR IMO.