TS 150 battery won't hold charge

[Andybantam71]

Hello all, I have a 77 TS150 that the battery is losing charge when running, I am only getting 5 volts at approx. 2000rpm(the battery was charged and checked out ok). The bike has a original style regulator(metal domed cover) so I am thinking it's either the regulator the coil or the commutator? any help or suggestions would be greatly appreciated. Many thanks, Andy.

[DAVID THOMPSON]

charge battery and measure battery and check to see if it drops without being hooked up
to bike

[Andybantam71]

Hi Dave, thanks for your reply. The battery holds a charge when not on the bike, I've got a output from the coil and the dynamo checks out ok. If I turn any lighting on even including the brake light it kills the engine. Regards Andy.

[DAVID THOMPSON]

try a different battery or load test the current one some times battery will show 6 or 12 volts
but will not deliver any current flow

[Andybantam71]

Hi, thanks again but the battery checks out ok. Regards Andy.

[Puffs]

Following a biased and flawed moderator choice (someone posting aggressive personal attacks is rewarded, while my technical posts are removed - behind my back & without any justification!), I have withdrawn from this forum.

[Andybantam71]

Hi, thanks for your reply. I've ordered a coil, regulator, condenser and carbon bushes so I'll see how I get on. Regards Andy.

[Puffs]

Following a biased and flawed moderator choice (someone posting aggressive personal attacks is rewarded, while my technical posts are removed - behind my back & without any justification!), I have withdrawn from this forum.