diagnose

Hey all... I am relatively new to this forum and thanks for having me.. This may have been discussed in here already but here goes.. I have an '86 max with virtually no top end after 6000rpm. I have gone through the manual and when testing the servo it moves when I add power at the plug...

When I start my vmax - I hear the typical whiz sound. Sounds good. I also hear a knocking like right under the faux gas tank... easily heard - not faint. Any ideas? ________ amber trichomes

OK. Sherlocks. This is a skills test for you petrol heads who want to test their motorcycle fault diagnosing prowess. :ummm: This quizz is based on a true story. I can usually sort out engine problems PDQ but I have just spent two days working on a friend?s Honda CX500 trying to figure out...