rocketman

Gio, I don't think I can answer your specific question about MT90 but I spoke with a technical rep from Redline yesterday. I asked him which product would be the best choice for my Guzzi transmission and final drive. He highly recommended shockproof heavy (better cling factor and the proper flow characteristics). I made a mistake and put shockproof light in mine. When I made the decision I was looking only at the viscosity ratings (light 75-140W. heavy 75-250W). I thought the heavy was too thick until I got some feedback from another member named Val. He encouraged me to call Redline. I will be changing to shockproof heavy ASAP. An expensive mistake @ $10.00 a quart. Hope this helps.

I am a new Guzzi Lemans owner and recently performed my first service. I put redline 15-50 in the crankcase and redline shockproof light in the gearbox and final drive. Based on my research, shockproof light, made the most sense because of its 75-140W rating. Since Guzzi recommends and 80/90W I thought the shockproof heavy seemed like an overkill at 75-250W. Whats up with the .02 liters of Moly??? (whatever it is)? Is this critical for the Guzzi trans? I too noticed improvement in shifting. Smoother, silkier, quieter.