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wont start wont crank wolf rx-50

 
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paulmars
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Joined: 01 Aug 2019
Posts: 19


PostPosted: Sun Sep 29, 2019 4:40 pm    Post subject: wont start wont crank wolf rx-50 Reply with quote

regularly driven 2-4 times a week.

wolf rx-50 with 49cc gy6 qmb139 engine.

battery 12.x volts.

full voltage at the starter push button.

no voltage at the starter when starter push button is pressed.

ideas?

tks,
paul
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Dooglas
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Joined: 08 Jul 2007
Posts: 4218
Location: Oregon City, OR
Buddy 125, GTS300, Typhoon 125

PostPosted: Sun Sep 29, 2019 5:24 pm    Post subject: Reply with quote

I know nothing about your scooter, but that sounds like it could be the starter solenoid.
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Stanza
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Joined: 29 Jan 2018
Posts: 480
Location: Chicago
Puch Maxi, Honda C70

PostPosted: Mon Sep 30, 2019 9:17 pm    Post subject: Reply with quote

That's a QMB139 engine, roughly the same bike as the Chicago Scooter Company "Go" model. Aside from the engine, it is not that different from the genuine models in terms of layout/wiring. I'm going to guess that your starter relay is bad. Trace the wire back from the starter up to the relay, and make sure you have a good connection there. Then, take a voltage reading on the line that is supposed to go down to the starter. If you have no power, backtrack to the line that supplies power to the relay and repeat the test. Keep going backwards till you find where the interruption is.
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paulmars
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Joined: 01 Aug 2019
Posts: 19


PostPosted: Wed Oct 02, 2019 12:39 am    Post subject: Reply with quote

Im looking for the starter relay. Is this it? https://imgur.com/a/HfYIOXe


what's this? https://imgur.com/a/fJm2Ns9
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Stanza
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Joined: 29 Jan 2018
Posts: 480
Location: Chicago
Puch Maxi, Honda C70

PostPosted: Wed Oct 02, 2019 3:23 pm    Post subject: Reply with quote

paulmars wrote:
Im looking for the starter relay. Is this it? https://imgur.com/a/HfYIOXe


what's this? https://imgur.com/a/fJm2Ns9




Your first image is the CDI. Your second image is the starter relay.
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paulmars
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Joined: 01 Aug 2019
Posts: 19


PostPosted: Thu Oct 03, 2019 1:12 am    Post subject: Reply with quote

Tks. Batt voltage is 12.8

Batt plus to one red on starter relay is 12.8. the other red on relay is zero volts.

That same other red on starter relay to starter is 2.2 ohms.

Confusing is that same other red on starter relay to engine gnd is 5.8 ohms.

Ur thoughts?

Tks, paul
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JettaKnight
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Joined: 29 Mar 2007
Posts: 557
Location: Fort Wayne
Series Italia 161

PostPosted: Thu Oct 03, 2019 2:32 pm    Post subject: Reply with quote

The thinner gauge wires that come from it go to the starter switch. If you apply 12V across those, but no clicky-clicky from the relay, then the relay is bad.

The lug terminals are for feeding the battery voltage directly to the starter, and should be a short circuit when the relay is engaged. I'm a bit confused by your resistance measurements... not sure what you are measuring where... one red wire goes to the battery, the other goes to the starter. The latter will have a low impedance to ground (i.e. under 10 Ohms) always.
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paulmars
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PostPosted: Thu Oct 03, 2019 4:42 pm    Post subject: Reply with quote

start btn bad
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paulmars
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Joined: 01 Aug 2019
Posts: 19


PostPosted: Thu Oct 10, 2019 9:50 pm    Post subject: Reply with quote

It worked for a few days with new switch, now its dead again. Now both sides of the start switch have 12.7 volts even with key removed and brake not engaged. Switch is fine.

Ideas?
tks,
paul
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Stanza
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Joined: 29 Jan 2018
Posts: 480
Location: Chicago
Puch Maxi, Honda C70

PostPosted: Fri Oct 11, 2019 1:41 pm    Post subject: Reply with quote

Bad starter relay, probably. Kick start no good?
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