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It'a a chainwheel on a spider, you should be able to use any 110 BCD chainwheel to replace it.

I think a "cheat sheet" listing different motor types, power, voltage and wheel size would be a great ressource. You are comparing torque with a 700C wheel?

I also learnt to heatsink the silicon wire when I used heat shrink. Now I use the HK XT60s with built in insulation. The grey colour is because you have gone too hot, doesn't seem to alter the quality of the solder though. A wide 60-80 W iron is the ideal tool.

It is an art form isn't it :) - tin your silicon wire, use lots of solder - use a third hand to hold the XT with the cups facing upwards - heat the cup with the solder wire touching it, as soon as it fuses withdraw the soldering iron - present your tinned wire to the cup and re-heat until it...

Should be printed on the label. Or the bill when you bought the conversion.

Will the New Yorkers of Irish origin be allowed to ride them too? :p

Hmmm... <scratching head> those distances are really short. How many Ah is the battery?

That would be rear hub... :rolleyes: BBS02 750 W - that is what the local delivery guy has on his trike.

How often has it been charged? What sort of distance have you done?

Is there a voltage reading on the LCD? Your symptoms sound like battery sag which means as soon as you try and use some power it trops below the 33v LVC.

What is the battery voltage? When you say 3/4 full are you relying on the lights on the battery or bars on the LCD?

Wow! Those are big bolts, I used chainwheel bolts and it fits fine.

If the throttle gets stuck open a brake cutoff can come in handy... otherwise with the KT controller and a hub motor you don't need one (I had 3600 trouble free km with my first bike). Mid drives tend to have a bit more run on so my GSM has one of these on the rear...

The question wasn't stupid, it wasn't well documented with a link to the bike in question that's all. Sorry for being cheeky but life is too short to not have a bit of fun once in a while...

Maybe a Smarta LX? In that case I would say it is a bit shorter than the bench it is leaning against... :D

I have been using the same XT60s without spark protection for well over 2000 km. They are a bit black but so far no problems and when there is I'll just solder a new one on.

French joke: Yellow in front, brown in back? It refers to a Power Rangers sketch by the Inconnus... :D

250 W-350 W then should do, the torque can be controlled by the sine wave controller.

https://www.yamahabicycles.com/

I would tend to think that a 500 W geared front hub motor wheel with a sinewave controller and a twist throttle might work for you? What are the dropout dimensions of your fork?