completed conversion and observations

Bud Baker

Member
My conversion of a 2010 Trek Pure Sport with an 8Fun 500 W 48V 11.4 amp hour frame mount is done. Purchased from EM3ev. The conversion included all new cables, brakes, derailleur and adding mirrors, bell, lights and clipless pedals. I installed the big green button shift assist on the left of the bar and used the included brake with cut off on the right. The 5 button controller is on the left and the throttle on the right. There is not much space left on the bar as it is a curved riser for comfort positioning so finding a flat section of bar is limited. The conversion was fun and a learning experience and I was fortunate to have a good mechanic offering advice. The BB is 73 mm and it took some trial and error to make sure the lock ring was flush against the frame. Get lots of washers if you have this install situation. When finished I took the bike to a church parking lot and spent an hour in practice mode. The button cut off works great for shifting and it becomes like an electric clutch quite quickly on the learning curve. Smooth shifts especially down. Very responsive with some delay as reported by others. I did learn the hard way to keep your weight shifted to the side of your bike where your shoe is released before you stop. SPD is new to me. Gravity is alive and well. Now on to a road trip. 15 miles with some hills 6 to 10% and I was either in 0 to 1 level with a small Portion in 2-3 maybe consisting of 1/4 mile. The last section home is 12% and I resorted to full throttle in low gear for maybe 100 yards. Climbed at 9mph. The pedal assist seemed to act as a cadence assist in that the harder I worked the less the motor would help for any given level. If I was say in level 1, and I was exerting minimal effort, the motor would kick in quite noticeably. If I was upping my effort the motor would back off but the end result was the same depending on what gear I was in. Part of my trip was rail trail, part major road and part country dirt gravel road. All said I did get in a workout but the 8Fun performed flawlessly. There were times I was glad to have the assist. Oh, used 1 bar on the battery scale. Next is a trip on the rail trail 30 miles round trip to our closest sizable market. Yes, we do live in rural NH. Cheers.
 

stevenast

Well-Known Member
Thumbs up! Sounds like a success! Did you keep a record of costs? It would be very useful information if you shared that!
 
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flymeaway

Well-Known Member
Yes, we do live in rural NH. Cheers.

Congratulations on the conversion.....I've done 3 conversions, 1 MAC geared hub, 1 750W 48v 8Fun mid-drive on a tandem and a 36V 500W 8Fun mid-drive on a Cafe'......I live in the shadow of Mount Monadnock.

Court J.
 

Ben

New Member
Hey, too mind elaborating on the "button cut off" that you refer to your post? I'm trying to source a kit at the moment and haven't seen any that come with a cut off button. Are you referring to the switch that is integrated in the cable brake levers such as on the em3ev kits?

Thanks
 

Bud Baker

Member
The button cutoff is available from Paul at em3ev it takes the place of one of the brakes having a motor cutoff and I chose the rear or left brake position. It attaches like the throttle. Instead of plugging in the supplied new brake lever, the button cutoff supplies that function. When shifting I press the green button and make the shift and then resume pedal assist. Very smooth. The inline sensor, which I purchased and which allows you to use your existing brake levers, were not suitable for my bike cable geometry. So I have one new brake lever with cut off on the front brake and the old brake lever and the button cut off switch.
 

Bud Baker

Member
Congratulations on the conversion.....I've done 3 conversions, 1 MAC geared hub, 1 750W 48v 8Fun mid-drive on a tandem and a 36V 500W 8Fun mid-drive on a Cafe'......I live in the shadow of Mount Monadnock.

Court J.

A very long and beautiful shadow it is. I am in the Upper Valley region near Hanover. Happy Spring to you and hope you are finally getting out for some rides. I did part of the rail trail and some places were still icy.
 

flymeaway

Well-Known Member
Happy Spring to you and hope you are finally getting out for some rides. I did part of the rail trail and some places were still icy.

It was a looooong cold winter! Yes, I've been riding, when possible, for about three weeks. About 200 miles so far, three 28 mile (round trip) commutes to work add up quickly. You certainly have some very beautiful countryside to ride in!

Enjoy!

Court J.