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Message: <blockquote data-quote="ekvh" data-source="post: 153540" data-attributes="member: 1179">To wrap up my recent posts on "1200 into a 1000 chopped." Some advice, get the spark and air leaks out of the way before messing with jet changes. I'm pretty sure this is dejavu, all over again, repeated, and multiplied. I'm a slow learner. I started assuming I needed jet changes this year when mine just wasn't performing as well as it should. I did an exhaust change and started noticing some backfiring on deceleration. Messed a bit with it and found I had some big gaps in my butchered intake manifold for the air filter. I decided to change it to an 1100 filter I had. What I should have done right then was go back to the jetting I had last year because after about ten days of constantly changing fuel jets and air jets and cutoff valve, I am finding myself close to being totally stock again. I went back to a 62 primary jet with a 120 air jet and it is reall good up to 5500. I still have a 130 main and a 68 air jet and a washer under the needle. That's a little more than stock on main jet, but I think the 1209 should pull a bit more??? Maybe not. Maybe the carb is just set to work with vacuum and is happy with the 77 cams and the extra 200 cc'a. I'm leaving for a few days, but next I'll pull the washer. If that doesn't get it right, I'll go back to a 120 main and a 60 air and be right back to bone stock settings! Changing jetting on these is tricky because there are two ( really three) circuits and they each continue to share and add to the mix. At this point I'm pretty sure I jumped the gun on changing jets and should have found the intake leak first. Hope this helps someone else.</blockquote>

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