Posted June 07, 2002 - 02:38 AM
Posted June 07, 2002 - 05:24 AM
As I understand it, the WR 400 has its exhaust cam timing advanced,, earlier exhaust valve opening and closing, with less overlap relative to the YZ 400. This is equivalent to one tooth on the cam sprocket. If you want to get more bottom and mid hit you can retard the exhaust cam by one tooth. I got the kit from Baja Designs, good instructions, jets, needle, good price.
[ June 07, 2002: Message edited by: SNF ]
Posted June 07, 2002 - 04:58 PM
Wow, another brain fart. I was thinking of the change from WR to YZ being retarded. You're right.