New 20 ounce tumblers available now! Forum donation credit with purchase. https://www.wildguzzi.com/Products/products.htm#Tumbler
I’ve got my fairly fresh V7 Sport back up and running. It’s been fighting me pretty hard. You can say we’ve bonded. Crank is freshly re-ground, both mains and rod journals. Top end is also fresh, valves, guides, rod bushings, pistons, re-plated cylinders, etc. I’ve got an annoying (don’t call it a knock yet) sound between 3500-4500 and it tapers off. Only on lazy acceleration, not when I’m holding steady or when I’m accelerating hard. I can’t re-create the sound when revving in neutral. Adjusting timing and valve lash has no effects.I just had the top end off and could feel no permissible big end play. It sounds pretty similar to spark knock without any performance loss (like a spray can rattle) although more rhythmic and not as fast as what I’d imagine a crank knock to be. It seems in rhythm to cam more than crank… if that makes sense. Loud enough to hear it with a full face helmet over valve clatter. It’s a slightly heartbreaking sound with no helmet…Oil is clean (outsider filter) sump is spotless when dropped (old habits dies hard).Any ideas? I’ll gladly wear earplugs.
So my failing bottom end was a harsh vibration travelling through the muffler to the header joint.I would take a serious look at all the engine / transmission mounting points, the foot rest / muffler hangers, the center stand mount bolts etc…..
How about rocker arm end-float? Are you using the OEM springs or thrust bearings?
What you describe with the engine in”float mode”,sounds like small end rod bushings. I replaced those on my eldo, and noise went away.Rick
That’s kinda where I’m at John. It runs fantastic, is smooth and it doesn’t appear to be any worse. I just kinda wish it wasn’t there…Knowing myself I’ll probably go looking for it this winter.