 Re: wrist pin needle bearing lubrication holes
the new ones are roller uppers. the past year or so. To be honest, I like the solid bearing as well. That is, if they use a hard metal for the solid. I also like the roller, that is, if they have a good cage and the piston and connection rod are proper for the roller. So.. Roller or Solid? Depends. Both can be best. I will use either in my engines. What ever is better. To be honest, I prefer the Solid if it is a good hard metal and does not wear out too fast. But Roller is what most people want for the upper. Not sure why. But roller upper is what is being sold currently. And they are working out well for sure. But I must say, if a roller goes, it takes out the whole top end and sometimes the bottom as well. The Solid gives warning when it starts to wear out and will not trash the motor like a roller can. But.. As long as the roller is a good setup, they seem to last and not cause any problems. In over a year now, I have only had 5 or 6 rollers returned for warranty. I must say, that is amazing. So..For now.. It is roller. Enjoy the ride.. |