9801srx
Member
all i can say is wow!! Got the jetting dialed in last night at -20c ,ended up using 47.5 pilots 1.5 turns on screws,needles 4th position washer top and bottom,and 157.5 mains. wash is between 5/16 and 3/8" from all transfers at half and full throttle.the plugs are a little darker than cardboard with the black ring about 3/4 down the insulator.does this sound good? in the clutches i have 5.3g in the shoulder5.8 in the tip and center empty with red spring and a 50/40 set at 60 with green spring. out of the hole it goes right to 8100 digs a 6" trench for 20' ,wheelies out of the trench ,losses traction and revs to 8500.revs drop to 8100 again when the track hooks up and then it climbs steadly to 8400 by 600' to 700' . still to nervous to try a longer wot run but in the short distance it rocks. compression is 145psi on all 3 by my guage after 120miles,does that seem about right? 
sounds about right on jetting, make a short mid throttle pass at steady half throttle for a good 600-700ft long. the needles is where more people have problems with a big bore then anyhwere else.
Take a peek at the center core electrode, it should just be silver around the outside edge with it being dark to black in the center, this means your pretty good with some temp drop safety in there yet. Dont be afraid to keep a 780 well fed!
Take a peek at the center core electrode, it should just be silver around the outside edge with it being dark to black in the center, this means your pretty good with some temp drop safety in there yet. Dont be afraid to keep a 780 well fed!