Recent content by Speedfreke

OK will ship tomorrow, good luck!

The 3- 60V bms' have the 'light-on' problem in the same location on the board (approx. in middle) although one of those has a couple of condensors (or capacitors?) missing as a friend tried unsuccessfully to repair one. The 72V board has 1 or 2 burned out mosfets I don't remember, it's been a...

The pack originally came with humungous andersons joining the 2 halves. I think Ping does that so riders can separate the halves and mount them on both sides of a rear rack . That's why the thin wires joining the battery and bms are soooo long and inconvenient for someone who keeps the 2 halves...

It's the light corresponding to the last cell where the lead connects to the other half of the battery. I think that a poor anderson connection (which joins the 2 battery halves) has damaged that component on the bms. If I remember correctly the corresponding cell charged up properly but didn't...

No, I can't mount them on the battery without a lot of trouble. If one of cells stays lit all the time it must be something wrong with the tiny gizmos on that corresponding cell and replacing that gizmo with a good one from the extra bms' should correct the problem. Ping said to use a meter to...

The battery is working fine with a new bms. According to Ping a capacitor is the problem with the 60V bms'. Fixing these bms' is beyond my capabilities. I just want one of the 60V bms'fixed to keep as a spare. Since there are 3- 60V bms' some capable individual can repair 2 of them with parts...

I will consider your offer but I'd prefer to stay within N. America

I have 3- 60V and 1- 72VPing BMS' all not-working properly. I think the 60V's - one light stays on all the time and the 72V may be the mosfet. I would like to have 1 60V repaired if there is somebody out there interested in exchange for the other BMS' and/or cash. I live in the Toronto area.

Dogman, maybe you are hinting that I might not be pleased with the performance of geared motors however I live in a built-up area and there will not be any long stretches to heat up the motor. But there is some stop-n-go. I read somewhere that geared motors are better at handling that. But i...

BTW, about 4 yrs ago I put together a 408 with 20amp controller and 72V SLA. I could have gone 36 or 48V battery no bms required. Nowadays with lifepo4 and lipo it seems that batteries come in a variety of voltages like 50 or 52 and their corresponding chargers and bms'. Therefore going from...

In this thread it sounds like some people are getting that 35 mph on Macs (8T or 6T , maybe 7T is a good compromise) using 48V and probably 35 amp controller. It's pretty tempting to go this route as you can use a smaller and lighter battery and possibly increase the Ahr rating for greater...

de-magnetize? how did you test for that? how old is your mac bike? My 408 (not the 406) motor is 4 yrs old and has lots of power still even though it's been thoroughly abused - rain, snow, cold, dirt. I t started off with 72V SLA. With only a 20 amp controller it still had plenty of guts.

Lot of great suggestions . I have enough to make a good decision. I never realized it takes 50% more power to get that extra 3 mph speed and then worries over excess heat. Still thinking mac for it's weight, size and stealth. Not sure whether to go 48V or 60V, maybe (just maybe) lower my...

Neptronix: I think you misread something, I'm getting 32 mph on a 406 crystalyte with 60V 15amp ping and 20 amp controller. Just something I threw together with leftover parts and a good deal on the 406. I will probably not be using any of those components on my new build with the mac 500-1000...

When you say max distance is 10 miles (at 35 mph) which motor and other components are you suggesting? As far as wheel size is concerned I already have a strong dual supension Mtn bike lined up.