YY250 with electrical issues By JR (Read 958 times)

[nepeterson]

Rather than starting a new thread (unless that's a better idea), I've opted to throw my $0.02 in here.

I recently acquired a YY250T (M/Y 2011) from my mom and it runs ok... It starts fine and gets me to and from school without much trouble, but I had to replace the battery when I first got it because it had been sitting too long with no love and went into a deep-discharge state. Anyway, I replaced the battery and it has been starting and running, but my turn signals have never worked quite right. They used to just be on solid (no blink) until I turned them off, and now they won't even turn on at all. I've wondered if I should replace the flasher unit. The reason I haven't jumped on replacing the flasher, is that I have read a bunch of stuff saying that the R/R in this bike is prone to failure.

In addition to my blinker dilemma, my idle is rough (<1000 rpm usually) and the bike will often die within seconds of starting unless I open the throttle a bit. My head/tail lights flicker during idle, but become very bright during acceleration. My horn works very rarely, but I've just chalked it up to a loose switch (also common, if I'm reading correctly).

My biggest concern, aside from the turn signals, is that when starting from a standstill, my rear (driven) wheel will "skip." That is to say that it will grab and slip repeatedly until the bike starts going around 3 or 4 mph. It's almost as if the driveline is producing too much torque for the bike to handle, so I'm laying down rubber when I try to start moving. It doesn't happen every time, but it does most of the time. It doesn't take much on the throttle to make it happen, so it's not like I'm opening it up fully every time I start moving.

Any advice you wizards have on any of my issues would be GREATLY appreciated! Thanks in advance!

[ellpee]

As proud owner of the same scoot, let me share. Mine has about 2500 miles on it now, and the left switch assembly is fritzed, primarily the turn signals. For either direction, I have to push the switch left or right and hold it in position, pushing it in slightly, to get the turn signal to blink. Not something one likes to do while whizzing down the road! It's in summer storage right now, but I plan to replace the entire left switch unit next month; not expensive, only costs $20 or so as I recall. I think I have a link somewhere, if I can find it I'll add it below. Since you have turn signal AND intermittent horn issues, I'd suspect the same problem in your case.

Out of the box, my idle was also rough and prone to dying at stoplights; I just opened the battery cover and turned the idle screw a bit until it was around 1200 and it's been fine since. Folks here have suggested 1500-1600, but 1200 is working fine for me.

And regarding the skipping, when I first started riding I was pretty tentative at startup and did a lot of low-speed practicing, and as a result the clutch pads glazed over pretty quickly and gave me a kinda jerky takeoff. Pulled the CVT cover and clutch bell -- had a bit of an impact wrench challenge there getting the nut off -- rough-sanded the pads a bit and saw an immediate world of difference.

BTW, when you pull the CVT cover the darn rubber gasket will come off, and keeping it in place when reinstalling the cover is a real PITA. My solution was to thoroughly solvent-clean the cover, then apply a thin bead of clear silicone all around, then replace the gasket and give it plenty of time to dry well. (I put it under a heat lamp to aid the drying process.) Have had the cover off 2-3 more times since then with no gasket issues.

Hope at least some of this helps. Here's the link for that switch assembly:

.roketapartsonline.com/scooter-handlebar-switches-handlebar-switch-35-for-chinese-scooters-mopeds-p-9421.html" rel="nofollow" target="_blank">.roketapartsonline.com/scooter-handlebar-switches-handlebar-switch-35-for-chinese-scooters-mopeds-p-9421.html

[bhinch]

One of the turn switch probs is the lever screw will work loose and cause the switch not to work. It is a simple fix to remove the two screws on the bottom of the switch and tighten the screw in the middle of the lever. Just hold the switch housing so it will not separate completely and the internal workings fall out.

[ellpee]

I'll certainly try that before I invest in a new switch, but I've had the thing completely apart and lubed and tightened everything with no success. Will report back here when I try your suggestion.

[nepeterson]

One thing I forgot to mention is that after I've had my scoot on the battery tender overnight, the little speakers tend to buzz pretty badly at mid-to-high RPM. I've dealt with a similar issue in a car, but was able to solve it with a ground-loop isolator in the wiring mess. Any ideas?

[JR]

Folks I opened a new thread and moved the posts here so we all could deal more directly to this members issues and not take away from the other members problems.

The blinker/horn switch is all on the same side (left) and have you left this scooter out in the rain much? Water doesn't do any of these switches any good and just a good contact cleaning after taking apart may do wonders plus checking the plug wire connections as well.

On the lights before staying on all the time that could be the flasher going bad and/or bad connections as well.

Radio? All will tell you a joke and the noise suppressor? Done that not much help. My advice if you're serious about a radio? Replace it.

JR

[nepeterson]

I'd rather just remove it, because I never use it anyway. Will I need to terminate the wiring harness or close the circuit in order to keep the scoot operating? On that note, how hard is it to remove the alarm system, as it's just another point of failure?

[ellpee]

Agree on the OEM radio -- piece of junk, lousy reception, loses even strong signal when on the move, mediocre sound. I bought an El Cheapo MP3 player and plugged it into the radio and it gives somewhat better sound, but inconvenient. I considered buying and installing a whole new radio/MP3 unit in the dash, but the truth is I can't hear it very well when on the move anyway (old ears plus helmet), so bagged the idea. If tunes-on-the-move is important to you, that's probably the route you need to go. Or if you wear a helmet, maybe an in-helmet sound system, though they're far from cheap.

[Barnie]

On the radio side of this, I moved my speakers from under fairing to the dash and I bought a sony Walkman and plug it into the mp3 cable and turn the power button on radio on and then push the mp3 button and the use the Walkman from there on. Plays absolutely great. If you do away with your radio, just tape the hot wire up so it cant short out on frame. As far as the alarm goes, all you have to do is unplug it under fairing, that's it, nothing elso. scooter will love you. I threw mine away 6 years ago. Barnie

[ellpee]

I was tempted to just unplug the alarm/remote on my Roketa too, but at one point when I had some electrical issues it was the only way I could start the scoot, so I shied away from doing so. Maybe if I have a lot of time on my hands this winter I'll explore adding an easy-access on/off switch for the alarm/remote system ....