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Cell age 2 years a part may well be a factor irrelevant of being the same voltage, they likely have either suffering higher IR & capacity loss. Also double check all buss connections, did you solder or weld them ?

Like the Aikema's the G370 also utilises a change to LHS cable exit.

Now I have seen the lateral play on the video the fix should be simple, on that side is located the press fit sealed bearing, a water seal and axle nut. It looks like the axle nut is certainly loose though whether there is any rough bearing rotation can only be felt by manual rotation. If the...

Yep , plan c or d.

Ken when you remove the crank arm (pedal arm if you like ) the axle it sits on is part of the BB (Bottom Bracket) it is basically a shaft with a bearing on each side. Remove the PAS and refit the crank arm tightly, measure the actual gap left. It should be 1 - 2mm greater then the PAS width...

It is only the Carrera bikes with the Suntour system that's not worth a light , others systems are ok and don't have the issues.

A rack one will work but extra expense and handling suffers a little. A triangle one fitted to the bottle mounts is best, look for downtube type battery then measure the triangle space to ensure it would fit with about 20mm clearance to lift off the mounting receiver...

Lookslike the pack could do with a rewrap in heat shrink. Access to the BMS is impossible without cutting the shrink so don't go there unless you have shrink wrap to replace it. If it is unbalanced there is chance it might rebalance but you will need to let the charge/balancing to do its job so...

At a glance of the pics we can see; If there are only two wire contacts the Red will go to the Brown as one is live supply and one switched supply. The black will be GND/- so will go to Yellow as this will be like wise. The White unsure see if it has any voltage with a meter between GND.

Is that all we have to go on ? How about amore expanded view of the handle bar set up.

Planetx currently have bars on offer. These are excellent value at < £10. https://www.planetx.co.uk/i/q/HBHUBOOM/humpert-ergotec-boomerang-handlebar < £8 https://www.planetx.co.uk/i/q/HBOOMB/on-one-mike-handlebar

Not much to fear in opening a battery if you are a practical person and can use a volt meter with some guidance. The battery may likely be fine though loosing some capacity thru ageing. Post a pic or two of the battery. If the battery has been idle charge/discharge it a few times to see if it...

Hand position/reach affects can affect parts of the body from thumbs up to the shoulder and the neck. I was getting bad hand ache esp around the thumb /wrist joint even with suspension so I changed handle bar to a swept back design giving a more natural wrist angle when riding, so much so that I...

The 8ah Zippy's will be fine for ebike use but does depend on how you mount and protect them from possible damage.

What is the controller current/ rating ? It should be marked on the controller label.

With lion or any lithium chem you need to use it often or monitor it when not in use. I keep mine in a cold dry garage when not in use and check the voltage every now and then for SOC and self discharge. The trick when not being used is to ensure SOC is between 3.6v - 3.85v per cell group for...

54v isn't typically high but not bad, bad. 48v lifepo4 is 16 cells in series or 16 x 3.2v for a nominal value of 51.2v, 58.4v is a max charge rate but is the top end at 3.65v per cell. 3.6v (95%) or lower is a better charge cut off rate, though it isn't unknown for lifpo4 to settle at 3.5v per...

5s1p 8000mah is about the highest you can get in 5s form they are rated 30c 240a capable but generally for longevity a 1/4 of the actual rating is better used for good life which is still 60a continuous. Though as £60 odd each for a kids bike a similar priced 10s 10ah lion will do the job, I...

Quite a few have bemoaned the one piece V12L in previous years.

For 10s lipo, 5s , 4s & 6s are easily available. the 4s & 6s especially can be had with 8ah, 10,12,16 & 20ah capacities. Lipo alarms are available for the correct lipo brick cell count, it will monitor each cell separately and give out a high pitch warning when any cell reaches the set voltage.