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Everything Dirt Bike
Make / Model Specific
Yamaha
The 1999 YZ250
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<blockquote data-quote="Trfsrfr" data-source="post: 209413" data-attributes="member: 3959"><p>[USER=1650]@ossagp[/USER] - Yes, it has an electrical solenoid.</p><p>So quick update -</p><p>The needle is an N3VF.</p><p>I just removed the carb and did some more cleaning, and reset the float. This float is tricky to set for me, but I put it at what I believe is 6.5ish mm, but its hard to tell cuz the tang holds it a set distance from the float valve plunger. Hard to see exactly where its resting. I might have leaned it out too much.</p><p>Also removed the solenoid and hooked it up to a 12v source and it moves/actuates, about 1/8 to 3/16 of inch. Also carb cleanered and blew out those passages, it appears that the rubber tip on the solenoid has seen better days, but maybe? not completely unusable, so it went back in. Also carb cleanered and blew out the passages for the air idle screw.</p><p>Set the air screw at 0 turns, per temp, altitude rec's.</p><p>Put the needle clip back at 2nd position.</p><p>Approx 1100 ft MSL in my area, give or take a couple hundred feet.</p><p></p><p>Started on 2nd kick.</p><p>Took it out for a quick rip - runs like shit. Mostly wouldn't rev.</p><p>Only went around the block once, but it intermittently hit the power band. Gonna park it for the night and try again tomorrow.</p><p>Did not check timing.</p><p>4 strokes are much easier to diagnose...</p></blockquote><p></p>
[QUOTE="Trfsrfr, post: 209413, member: 3959"] [USER=1650]@ossagp[/USER] - Yes, it has an electrical solenoid. So quick update - The needle is an N3VF. I just removed the carb and did some more cleaning, and reset the float. This float is tricky to set for me, but I put it at what I believe is 6.5ish mm, but its hard to tell cuz the tang holds it a set distance from the float valve plunger. Hard to see exactly where its resting. I might have leaned it out too much. Also removed the solenoid and hooked it up to a 12v source and it moves/actuates, about 1/8 to 3/16 of inch. Also carb cleanered and blew out those passages, it appears that the rubber tip on the solenoid has seen better days, but maybe? not completely unusable, so it went back in. Also carb cleanered and blew out the passages for the air idle screw. Set the air screw at 0 turns, per temp, altitude rec's. Put the needle clip back at 2nd position. Approx 1100 ft MSL in my area, give or take a couple hundred feet. Started on 2nd kick. Took it out for a quick rip - runs like shit. Mostly wouldn't rev. Only went around the block once, but it intermittently hit the power band. Gonna park it for the night and try again tomorrow. Did not check timing. 4 strokes are much easier to diagnose... [/QUOTE]
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Everything Dirt Bike
Make / Model Specific
Yamaha
The 1999 YZ250
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