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New member - Sherco Trials Bike conversion - HPM5000B-48V

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Pkay:
Hi All

Thank you for this great forum.

I have just ordered:
HPM5000B-48V BLDC motor
VEC300-48 Controller
LFP 4820 LiFePO4 48V 20Ah battery

The donor bike is a 2016 Sherco 300ST trials bike.
Have ordered toothed pullys and belt for 1:2 reduction transmission (same as Electric Motion design).

Should I start up a new thread (if so in which section) to describe the build?

Bikemad:
Hi andto the forum.

I have moved it to this section so you might as well continue with this thread.

I presume you have already seen this thread regarding gear ratios. 

Alan
 

Pkay:
Thanks Alan for moving the post, and the info on gear ratios.

I have had a good look at the EM bikes and have spent some time riding one.
My design is based on the EM trials bike.

I am doing the 1:2 belt reduction drive transmission.
The toothed pullys and belt are easily obtainable (Gates).

At this stage the default chain sprocket ratio is 10:42 teeth which gives 1:4.2 ratio.
After the 1:2 reduction that gives 1:8.4

I can easily add a smaller chain sprocket at the front if needed (or larger at the rear).
Will wait and see how it rides.

Pkay:
Work has begun...

Engine has been removed.
The frame has been modified to allow clearance for the battery.

Next is electric motor and transmission support structure.

See attached image.

Pkay:
The pullys bearings and belt for the transmission.

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