How to fine-tune your jetting: Difference between revisions
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====Step 2: Find the proper needle height.==== | ====Step 2: Find the proper needle height.==== | ||
Start from tuned jet | Start from the tuned jet that you decided on in step 1. Use the stock needle height, and keep raising the needles by adding washers. If it runs better with more washers, then, when you get to about 4, go up a size on the main jets and start with the stock needle height again. | ||
Even after you get the main jet correct, you will often end up with a midrange stumble at 5k-6k rpm. This has little to do with main jet size. You can take care of it by adjusting the needle height. Lower the needle until you get a mid-range stumble, then raise it by 1 washer at a time until you get rid of the stumble. | Even after you get the main jet correct, you will often end up with a midrange stumble at 5k-6k rpm. This has little to do with main jet size. You can take care of it by adjusting the needle height. Lower the needle until you get a mid-range stumble, then raise it by 1 washer at a time until you get rid of the stumble. | ||
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LEAN = Stuttering. Runs better when bike is hot. White plugs. | LEAN = Stuttering. Runs better when bike is hot. White plugs. | ||
RICH = Bogging. Runs better when bike is cold. Black plugs. | RICH = Bogging. Runs better when bike is cold. Black plugs. | ||
====Step 3: Find the proper idle mixture.==== | ====Step 3: Find the proper idle mixture.==== | ||