85 jetting got me. Ughhh!
Posted 05 May 2012 - 12:59 PM
I've done everything possible but change the needle since I don't have any to change out. I went up and down on pilots & mains & clip positions.
When I went leaner on either jet, it go worse (IT'S SUPPOSE TO GET BETTER!!)
I tried every clip position with every jet configuration I have: which is 132 to 145 mains and 35 pilot to 45. I went up and down in every different way with evry single jet.
up-up, up-down, down-up, down-down, trying all 5 positions at every one. Trying air screw from 1 turn to 4 turns at 1/8th turns at a time.
End result: 138 main, 45 pilot, clip 3rd from top, AS 1 3/4 out.
And yes been through 8 plugs to make sure I have a good clean burn and no fouling.
This is as bad as a CR125. either you get it spot on or you don't get it at all.
Posted 05 May 2012 - 03:07 PM
Posted 06 May 2012 - 05:29 AM
Jake would get to the 4th or 5th lap and the thing would hit almost 200 degrees, this is with his 103 race motor. Our 112 race motor is 16.5 to 1 compression and runs 160 to 170 degrees right now when it's 90 degrees here. Thankfully out of all this the new TDC 103 ported cylinder and o-ringed head are still perfect. I'd have really felt awful if they would have been damaged. Brent has more work in this 103 cylinder than the 112 because he thinks we can get close to the same performance, with some new head designs he's done.