View Single Post
  #13  
Old 16-Sep-2009, 22:36
Ghost's Avatar
Ghost Ghost is offline
Registered Forum User
Big Twin
Bikes: Ducati 749, Phil Read Replica, DD 620
 
Posts: 1,830
Join Date: Mar 2008
Mood: 2011 DD Class 'B' Champion
Quote:
Originally Posted by skidlids
.The variance/tolerance of electronic ignition is normally quoted as plus or minus revs at a fixed number of degrees of adavnce.

On a 900 (haven't got my 600 manual to hand)
@1700 revs + or - 200rpm the advance is 6 degrees
from 1700 to 2600 rpm + or - 300rpm the ignition timing advances progressively to 32 degrees and can be checked with a strobe against the timing marks on the flywheel

So whats all the fuss, if anything is strobed and reads in the region of 32/34 degrees of advance. thats ok.

Going over that you need some good fuel to prevent detonation.
Look at the bikes no one is streets ahead so lets just get real.

We have had the humped pistons and big valve heads. We need something really radical now in the same guise as a normal motor.
Quote+Reply