Original Powabyke

neptune

Esteemed Pedelecer
Jan 30, 2012
1,743
353
Boston lincs
This is my first post . I am new to electric bikes , although I did have an electric trike about 10 years ago ,which I built myself . It was illegal ,being overweight and having no pedals . I have just bought an original powabyke off the internet for £85 . The previous owner said he bought it new about 2005 . It has a steel frame , no suspension , and lead acid batteries . I understand it still has the original batteries , which I will replace soon , although tests show a range of 13 miles without pedalling . Straight off the charger , the battery reads 39.2 volts , which is a bit low . Everything works , and it is fun to ride , and although heavy , I reckon I could pedal it 5 miles if the battery failed . I have a few questions .
1. I have heard that these bikes eventually fail due to gearbox issues , so I have partially stripped the hub , and filled the gearbox with fresh grease . I wanted to check the brushes , but it appears that the left side of the hub where the cables enter , is not removable . Are the brushes still available ? Anyone done a brush replacement on one of these ?
2 On the rear hub is a large round thing with wires attached . I am assuming this is a motion sensor . It has a torque arm which is not attached to anything . Should this attach to the frame with a clip ?
3.On the front axle , left hand side is a torque plate which is attached to the fork dropout with two screws . There is no such plate on the right hand end of the axle , although the screw holes exist . Should there be a torque plate on this side ?
4 The bike is old . would you recommend new lead acid batteries or something else ? The bike is used only for pleasure cruising , but a fairly long range is important to me . I hope someone can answer some of my questions .
 

johnc461165

Esteemed Pedelecer
Aug 19, 2011
546
22
WN6
I have 2 of these bikes one is 12 years old and gbox is fine regreased it and no wear apparent, never changed brushes so unable to answer, round thing at the back is a motion sensor which allows throttle use once moving, torque plate on one side is the same as both my bikes, from the use that you mention sla batteries will serve you well in my opinion, I have added some pics that may be of interest to you of the motor insides hope this helps you, don't hesitate if I can help you further, I am better at e mailing pics than posting them on here if you want to send me your email address using a pm. John
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neptune

Esteemed Pedelecer
Jan 30, 2012
1,743
353
Boston lincs
Hi johnny and many thanks for your reply . You forgot to tell me if the motion sensor has its torque arm clipped to the frame . The clip seems to be missing on mine . I had just about decided to go for new lead acid . Ebay prices are £50 to £130 . Anyone got any recommendations on choice ? Also , has anyone got a surplus battery box please . At only 10 stone , I could carry my old battery as a spare on some trips . My Email neptune8@sky.com
Kind regards , Ken
PS would welcome those pictures Johnny please .