DC System and sip speedo issues

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wintermod65
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Posts: 94
Joined: Mon Apr 02, 2018 8:06 pm
Main scooter: winter model
Location: Suffolk
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Sat Jul 13, 2019 10:25 pm

hi
having the sip speedo cut out issue on a dc system
scootronics dc stator ,bgm flywheel , wassel regulator , mb wiring loom scootopia switches , all new less than 200 m on gt 240 motor

speedo comes on with daylight/main lights position on ignition switch .

Sip 5AH battery , which now doesnt seem to hold charge always been kept on optimate battery charger .
am getting 12.95v dc across battery engine not running

and about 14 to 17.9v with engine running from tickover to revving wonder if the upper reading is too high and frying the battery or if ok why does speedo cut out if needs 12-16 v

speedo comes on if engine runs then goes off if press brake light / horn

any thoughts or similar experiences with DC system be helpful
cheers

firekdp
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Location: Fareham, Hants
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Sun Jul 14, 2019 10:39 am

Yes, 17.9v will damage the battery, looks like you have a dodgy rectifier. Was it a genuine Wassel?
To test the battery, hook up your voltmeter to the battery, switch on the lights and hit the brake light and see what effect this has on the battery voltage.

wintermod65
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Posts: 94
Joined: Mon Apr 02, 2018 8:06 pm
Main scooter: winter model
Location: Suffolk
Contact:

Sun Jul 14, 2019 1:51 pm

regulator was bought from MB scooters , so hope was genuine .

lights were dim when switch on even after charging battery will get reading on meter .

went for ride out today speedo led display cut out even while doing steady 40-45 mph without operating brake light or horn , turned key back to ignition only position then to daylights position an speedo resets .
was going to get new regulator as precaution saw video on youtube guy with vespa auto poss lx says max charging voltage should be 16v so mine seemed high if the lambretta dc system should be abot same

firekdp
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Posts: 729
Joined: Wed Jan 07, 2009 12:02 pm
Location: Fareham, Hants
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Sun Jul 14, 2019 5:36 pm

wintermod65 wrote:
Sun Jul 14, 2019 1:51 pm
regulator was bought from MB scooters , so hope was genuine .
I see he advertises them as Wassel/podronics/BGM/scootronics! So you'll have to ask him which one it is, as it can only be one of them. If it is the type with one yellow cut off it's probably the 3 phase one repackaged as BGM.
For good battery life, I wouldn't want the reg/rec output to go over 14.7v.

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