posted in the Yager section but thought I open this up to all Kymco gurus.
Backstory: Bought a 2010 Yager 200i with 900 miles on a few weeks ago. Clean and no rust.
Shop stated previous owner traded it because it was having battery problems. Added a Battery Tender lead to charge every night or would not start in the am.
When I picked up shop installed a new traditional Interstate battery.
This battery lasted about 6 days then would not start so I started using my Battery Tender Jr.
Replaced it with a Scorpion YT12a-bs (175cca)
After a week same starting problem again so back to using Tender.
I cleaned (wire brush) & di-electric greased frame ground plus connections at the starting relay/solenoid assy. All connection were tight from factory.
When the motor runs it’s strong with no issues or misses. Have run several tanks of gas in it. Changed oil, new spark plug, clean air filter.
With a fresh charged battery it starts fast and idles well. Starts every time however with my Lithium battery jumper box.
Findings:-battery holds 12.5v when sitting for days (disconnected)
-scooter charges at 13.9-14v consistently at idle & speed
-on a 10amp scale, the negative wire & negative battery post draws 0.01 key off
-on a 10amp scale, the negative wire & negative battery post draws 5.4 amps key on. Normal?
-continuity is 0 on the negative battery side to all frame points and engine
-continuity is 0 from positive battery to starter relay battery side
-no continuity across the starter relay when off
-continuity is 0 from the starter side of the relay to where the positive attaches to the starter
PLUS is 0 to all ground points on frame/engine. No voltage just continuity. Is this normal to have continuity across the positive to the negative thru the starter?
Observation:ok here are things i tested in this order.
battery fully charged overnight.
cold engine
key off - .01 amp draw between neg battery & ground. no parasitic drain.
key on - 5.40 amp draw. normal range?
key off - 12.8v
key on - holds steady at 11.9v for well over a minute (no drop)
engine starts like a champ & runs well.
13.9v while running
turn engine off for 1 minute
key off - 12.5v
key on - voltage drops quickly to bellow 11 in less than 30 sec
will not start now.
recharged battery fully to test voltage drop when starting at 2 points
pos & neg battery terminal: +/- 10.6v
pos & neg at starter terminal: +/- 8.6v
so i'm seeing a approx 2v difference down at the starter
Conclusion: so I get 1 good start, then something happens?
heading now to parts store to test load ability of this battery.
normally I would say this is a bad battery, but it's the 3rd in a row so something is causing batteries to fail?
Where should I go here to determine what is causing this battery/heavy drain issue?
Buying yet another battery does not should like the solution.
I love this scooter and don’t want to trade it in on something else, but it’s far from no surprises right now.
thanks
Bill
