Walmart Jackshaft Kit

Freddy Snottgrass said:
Just browsing Walmart's motorized bicycle stuff. Came across this. Thoughts?

https://www.walmart.com/ip/Jackshaf...ull-Set-For-Motorized-Bicycle-Bike/5617831946
Click to expand...

Well I did see this on their ad...lol.

About this item​


[Accessories] This product includes all intermediate shaft kits for gasoline electric bicycle conversion accessories. All accessories are included for easy installation.
[High Quality] This product is made of high-quality materials and has low noise, just like an ordinary bicycle.
[Installation] This product does not include installation instructions, please install it through professional personnel. We can provide electronic installation instructions.
[Application] For almost all unchanged ordinary two-stroke bicycle engines and allows users to use. This kit will fit on a regular pedal bike, but the engine conversion kit has to be installed first. Using the old machine throttle, this product is not included. Motor not included, this is a separate conversion kit.
[Chain model] 415 chain.

And this last little disclaimer below...lol....lol.

Higher installability is required for this item. Please don't place the order if you don't have one Idea to install or discontinue this kit.

Ps...The wording used and syntax of this last disclaimer tells me it's Chinese, probably made from real, honest to goodness Chinesium...lol...lol...lol.

sg15SHU.png
 
There are still fast-follow shift kits but I have no idea on how well the freewheel will hold up. That is a nasty failure if that locks up or stops transferring power. The cyc x1 motors use freewheeling chainrings. Try researching if those fail and the how and why of failure.

Some mid drives use ratchet and pawl freewheels, others use sprag/over running clutches. Any how those can have stupid quick but just absolutely slam the drivetrain with the instantaneous torque of electric motors.

While there are some exceptions, most bicycle drive trains can't take too much, and as a result they have found what holds up the best. The Endless-sphere mid drives section is very useful here. Easy to search, has been used forever and is well moderated. No spam, or ads and people write in good faith.
 
Well I have to strongly disagree. I have eight bikes with the SBP's shift kit installed and I have NOT used the heavy duty freewheel on any of them - the heavy duty freewheel is for high compression engines because the cheap chinese freewheels have poor quality pawls that can fail easily! Once you have started the engine all the free wheel has to do is err free wheel!! The little ball bearings are just as happy to roll around as the ones in the more expensive free wheel. The HD one does have a seal which would make it last longer in dirty environments - but I am using mine as an expensive paper weight as it has excessive free play in it and is NOT easy to service unlike the cheap ones!!

Improper starting technique will break the cheap ones - I have broken two by jumping on the pedal forgetting the starting instructions which are:
-position the pedal up near the top of the down stroke, get some weight on the pedal so you can feel the compression, as it starts going down continue pushing pedals in a circular motion until it starts. BTW I have combined mileage of well over 5000 miles on my bikes.

I have one of the chinese shift kits which I bought before I found the SBP's kits. I eventually got it working but not without major modifications after getting the SBP's kits and seeing how they work.
John
 
Jonda500 said:
Well I have to strongly disagree. I have eight bikes with the SBP's shift kit installed and I have NOT used the heavy duty freewheel on any of them - the heavy duty freewheel is for high compression engines because the cheap chinese freewheels have poor quality pawls that can fail easily! Once you have started the engine all the free wheel has to do is err free wheel!! The little ball bearings are just as happy to roll around as the ones in the more expensive free wheel. The HD one does have a seal which would make it last longer in dirty environments - but I am using mine as an expensive paper weight as it has excessive free play in it and is NOT easy to service unlike the cheap ones!!

Improper starting technique will break the cheap ones - I have broken two by jumping on the pedal forgetting the starting instructions which are:
-position the pedal up near the top of the down stroke, get some weight on the pedal so you can feel the compression, as it starts going down continue pushing pedals in a circular motion until it starts. BTW I have combined mileage of well over 5000 miles on my bikes.

I have one of the chinese shift kits which I bought before I found the SBP's kits. I eventually got it working but not without major modifications after getting the SBP's kits and seeing how they work.
John
Click to expand...
All the SBP shift kits come with the heavy duty freewheel.
 
If my memory serves me correct, they had at least 3 levels of freewheels before they closed up shop, cheap chinezium, heavy duty and extra heavy duty? Their cheapest basic kit came with the $20 freewheel. I only bought their HD kit once - it came with the HD sealed freewheel and sealed BB/crankshaft unit - both of these I found to be not necessary for my purposes. John
 

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