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Post by scooterpimp on Apr 25, 2015 21:19:48 GMT -5
On my vento triton i noticed rpm's drop some with lights on & increase when off is this normal? My other scoots have lights on full time so i cant tell on them if it happens or not. Im guessing its just a load on stator but curious if others do this also. Thanks
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Post by themajekalbum on Apr 25, 2015 22:35:40 GMT -5
I can confirm this. I put my headlight on a switch and my rpms drop about 1-200 rpm with my headlight on.
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Post by 90GTVert on Apr 26, 2015 7:48:48 GMT -5
Yup, totally normal. I leave my lights off when warming up the scoot so it is less likely to die.
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Post by scooterpimp on Apr 26, 2015 8:53:27 GMT -5
Ok thanks , ill just set up my idle speed with lights on .
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Post by themajekalbum on Apr 26, 2015 9:51:19 GMT -5
Mine is off all the time unless it's dark, gotta squeeze every last bit of power out
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Post by scooterpimp on Apr 26, 2015 12:21:05 GMT -5
Thats when i noticed it , recently took this scoot out at night (for the first time), & noticed low idle . Gonna put some miles on it on vacation.
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Post by 90GTVert on Apr 27, 2015 7:29:53 GMT -5
One good thing about the LED lights is that they are bright for onlookers and draw very little power. I use my LED exclusively in the daytime on T2 because it's brighter to others and has essentially no effect on my idle speed. Maybe add an LED on for increased daytime visibility if standard lights aren't used.
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Post by fe53series3 on Apr 27, 2015 16:56:38 GMT -5
What's happening, is that the spark voltage 'headroom' drops to 'less than ideal'. At tickover, without any additional electrical draw (lights or an alarm etc.), the generator is being turned fast enough to create sufficient voltage, to feed the coil system, and create an ideal spark for that RPM....... but it's usually on the limit. Switch the lights on, and they suck current that is required by the ignition...... so a weak spark is produced, reducing combustion efficiency, so lowering power output..... causing RPM to drop. This is worth knowing! It highlights just how close to the edge our ignition systems are (when starting, and at tickover). Hence why it's worthwhile keeping all ignition cables, coil posts, earths, and HT cables shiny clean.... to prevent current leakage to earth. I think 90GTVert's idea of using an LED emergency light is great. Note: As engine revs rise, so does the speed of the generator, and enough electricity is generated to feed the spark, power the lights, and charge the battery.
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Post by Fox on Apr 27, 2015 17:28:03 GMT -5
I always try to set the idle on all the scooters I work on high enough so the battery terminals get a 12.5+ reading with the lights on. It doesn't work on some scooters because the rear wheel will spin at that point so I just adjust it as high as possible on those. The problem is that these Chinese electronic components aren't subjected to a pass/fail standard of measurement so you get all kinds of different stator and regulator output readings from scooter to scooter. I just worked on a brand new SSR scooter the other day that had the stator fail after 40 miles. I replaced the stator ad fired it up and immediately the regulator started smoking. The owner of the shop is Korean and she goes: "cheap Chinese sh*t!"
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