rfw2003 wrote on 09/01/12 at 17:49:30:ralfyguy wrote on 09/01/12 at 17:38:07:I'm just impressed how much bigger it shows to have the main jet and how much smaller the pilot jet. It is somewhat completely opposite from what the majority of folks here are doing before you posted this thread. Looks like we must be all jetted completely wrong.
The discrepancy is simply stunning.
To be honest, it doesn't surprise me one bit. We have been jetting via spark plug readings and backpop through the muffler. When jetting using spark plug readings you are jetting over an avg throughout the throttle range and not each individual range unless you have a dyno so that you can specifically hold it in that range and shut it off while it's in that range of throttle. Overall if you look at it with a bigger main and smaller pilot you still getting the same fuel at WOT as a bigger pilot and smaller main since they are all accumulative.
R.F.
It makes sense what you say. Still amazed about the pilot jet part. I can't remember anybody trying a smaller pilot than the stock one because everybody thought it is too small. So a bigger jet went in. Usually from stock 52.5 - 55. This made the bikes run better at idle and low speeds/throttle.
About the main jet part, usually people went from stock 145 to at least 150 (like me) or even 155. But according to those readings, still waaaay to small. I once tried a 155 on mine and the bike just choked on it when cracked open and that with a new air filter.
BUT, if you look at the jet sizes on 80's Savages the stock pilot was a 47.5 and the stock main was a 155. And that was before EPA BS.
But the carbs back then were a tad different as well. The needle had no spacer, but grooves instead and that one air jet was different as well.
Makes me wonder if we were to use the older carbs, the bikes would run better to begin with.
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