January 12, 201313 yr Think my 250 r is running a bit rich. Any one know how to set mixture screw ( how many turns ) thanks any help would be great.
January 13, 201313 yr general rule of thumb is get the bike to normal operation temperature, set the tickover sligtly higher than normal, say 1500 rpm max, then slowly screw in the air screw until the engine starts to slow, then screw out again and the revs should rise, continue screwing out slowly as the revs are rising, eventualy they wil start to drop again, screw back in to the point where the revs were at maximum and re set your, tickover. Things to remember. 1. its cold at the moment, you bike will be running leaner than normal. 2. clean the air filter before doing this set up. 3. use a new spark plug. 4. as the weather warms up you WILL need to do this again. 5. this presumes that all other mechanical aspects of your bike are good. 6. if the procedure doesn't work it might be that you have the wrong size pilot jet in. using this method i have set up more rev3's than i can shake a stick at, i'm sure the SY uses the same carb.
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