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Motorized Bike Jackshaft Kit Item# SD-JKSHAFT

OUR PRICE: $189.95
List Price: $297.95
Description

Use your existing gears/dérailleur to maximize the performance and top speed of your motorized bike. This kit bolts onto your bike frame and motor and connects directly to the bikes gear system rather than using a separate sprocket.

Warning: Installation is not for the faint of heart. This kit will allow your bike and bike engine kit to do dangerously high speeds! Install at your own risk. 

Recommended for advanced users. Kit does not come with instructions.

Waranty information

All of our bicycles come with a 60 day warranty on frame failure and 30 days warranty on parts against any manufacture defects. The manufacture will replace any defective parts within the warranty period. Damages caused by misuse, improper maintenance or neglect are not covered by the manufactures warranty.

All returns must be pre-approved by contacting our RMA Department through the contact us page. Please provide us with your order number, date of purchase and reason for return. Not providing the detailed information requested will delay the returns process. Returns must be made within 5 days of delivery and are subject to a 15% restocking fee. Item must be returned in new, resellable condition.

Once your request has been received, you will be contacted within 5 business days with instructions for sending back the item(s). You must re-package any item(s) being returned as it was delivered to you, with all components, materials and documentation. We will ship the replacement once we have received and processed the returned item(s). If you request for a refund, we will notify you via Email of your refund once we have received and processed the returned item(s). All refunds will be limited to and based on the current price of the item minus any restocking fees.

All shipping costs are non-refundable. Customers are responsible for return shipping back to BikeBerry.com

By initiating the RMA process customers agrees to all decisions by BikeBerry.com and all decisions are final. Please allow up to 2 billing cycles for your credit to be posted to your account.

The following are warranty limitations and exclusions for bicycle engine kit product(s):

* Hoses
* Lubricants
* Gaskets
* Spark plugs
* Standard wear and tear: plastic parts & components (color coordinated housing, brakes, brake handles, seats, chain and tires.
* Extreme riding, racing or competition
* Loss of time without vehicle
* Vandalism, fire or theft
* Crash or accident
* Unauthorized outside repair
* Warranty does not cover or reimburse any outside labor charges
* Warranty does not cover any towing or shipping charges to and from for any reason including but not limited to repair, return or exchanges
* Defective warranty part(s) are required to be returned for exchange or for new replacement part(s).

The buyer is responsible for returning the products at their own expense during warranty. The buyer will be responsible for properly packaging the product(s) and shipping product(s) back to our location.
The warranty is voided if:

* The product(s) is customized in any way other than manual.
* The product(s) is damaged due to natural causes.
* The product(s) is damaged due to an accident.
* The product(s) is vandalized or stolen.
* The product(s) does not get proper or periodic maintenance.
* The product(s) is used in a manner which it was not intended for.
* The product(s) is modified

Only parts will be covered under the manufactures defect warranty. It is the responsibility of the customer to determine which part is defective. Customer is responsible for repairs or installation of new exchange parts. Only defective parts will be exchanged.

Best Price Guarantee

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Best Price Guarantee Terms and Conditions:

Item must be the identical model from an authorized U.S. dealer. Specifically, the product must have the same U.S. manufacturer's warranty, model number, and contain the same components. BikeBerry.com will price match only in-stock products.

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BikeBerry.com does not match auction websites or refurbished products.

The Best Price Guarantee does not apply to obvious pricing errors or clearance/close-out items.

Best Price Guarantee applies to the total purchase price of the item. Total purchase price includes shipping, taxes, or other discounts.




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PRODUCT INFORMATION
WARRANTY INFORMATION
BEST PRICE GUARANTEE
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Reviews

Customer Reviews

Sweet! Review by Big Daug
Rating
I just got my Jackshaft kit and I only had a small issue with missing set screws for my new sprockets. Other than that, this assembly is Sweet! What an awesome experience. If anyone needs help, go to youtube.com. I had this on my bike and running in a couple hours. Man, is my bike fast! Thanks Guys! (Posted on 11/2/13)
GEARS Review by BOBBY G
Rating
I HAVE A 29 INCH BIKE, SO I GOT A 48 TOOTH GEAR AND AND A 36 INCH TOOTH FREEWHEEL GEAR FROM SICK BIKES NO NEED TO FILE ANY OF THE TOOTH AND ALSO USE A 10 TOOTH TOP GEAR ON THE MOTOR, AND I USE THE STOCK MULTISPEED CHAIN AND HAVE NO PROBLEM WITH THE CHAIN FALLING OFF,ALSO DONT USE THE CHAIN THAT COMES WITH THE KIT ITS WILL KEEP ON STRECHING.USE A 410H 1/2 X 1/8 KMC AND IT WILL STAY TIGHT. (Posted on 7/2/13)
TRY THIS Review by BOBBY G
Rating
INSTEAD OF SANDING THE SHAFT I OPEN UP THE INSIDE DIAMETER OF THE TWO BEARING A FEW THOUSAND.THIS WAY THE GEARS WONT FIT LOOSE ON THE SHAFT.I TOOK A ROD AND TAPE SOME FINE SAND PAPER AND WRAP IT AROUND AND USE A HIGH SPEED DRILL TO POLISH THE INSIDE BEARING,HOLD THE INSIDE OF THE BEARING SO IT WONT SPIN WHEN DOING THAT.AND ALSO LIGHT DEBUR THE SHAFT. (Posted on 1/17/13)
not happy at first but fastest coolest motor bike in these parts Review by RZster
Rating
overall parts are 2nd rate main bracket is junk had to cut one side off and remove 120thou off and weld back together the bearings fit loosely in bracket had to deal whith that then the shaft looked like rebar I had to chuck it up in my lathe and turn it down to fit in bearings now it works there are better ones out there little more money And the Chinese freewheel bearing lasted 17 miles go american there ultra fast now cruising 40 mph no problem (Posted on 12/31/12)
easier starting with jackshaft kit Review by Bobby g
Rating
I added another head gasket to lower the motor compression so its a lot easier to start,didnt feel like i lost any power, compression about 110 pds.now,made a big differance on starting the motor. (Posted on 12/26/12)
ray_larkstinkytown@live.com Review by simon black
Rating
hi i got this jackshaft and i'm looking for the manual for ir, i have the same one as seen here, if you have this manual can you please e-mail it to me, looks great can't wiat to put it on if i can thank you simon black (Posted on 12/12/12)
WORKS GREAT Review by BOBBY G
Rating
I USED A GARAGE DOOR OPENER CHAIN WHICH IS BETTER THAN THE multi speed chain .BUT I MODIFIED THE FRONT DERAILER SO IT GUIDES THE CHAIN ON THE GEAR ,SO IT WONT JUMP OFF, ALSO I DIDNT USE THE MASTER LINK,I JUST PRESS THE PIN ON THE CHAIN BACK IN SO NO NEED FOR MASTER LINK.I HAVE A SEVEN SPEED CASSETTE.JUST MAKE SHURE YOU FILE ALL THE 4 GEARS TEETH,AT A 45 DEGREE ANGLE.ALSO OIL UP THE ONEWAY BEARING OFFEN. (Posted on 11/18/12)
true diy Review by Neil
Rating
This kit requires about an hour of sanding and filing the shaft and bearings to make things fit. The kit is considerably cheaper than the ones on sickbikeparts.com but I used the PDF instruction manual from sbp its practically the same kit minus some parts. The only problem I'm having is I used a single speed chain on my 5 speed cassette because my multi speed chain was too skinny for the freewheel sprocket and after I got it running and drove it around the neighborhood the chain kept popping off because it lacked the flexibility of a multi speed chain. Eventually the wider chain hooked on a bolt near the cassette and popped the master link off and wrapped my derailleur on it self beyond repair and shredded the plastic gears on it. I think I can get it to work properly with a new derailleur after I grind down the sprocket teeth so they are skinny enough for a multi speed chain and prevent popping. I will also shorten that bolt. Note to potential buyers. Make sure your bike is made of thick steel tubing and not thin aluminum. When starting the engine a lot of torque is pleased on the bottom bracket and and can twist the frame of the bike. I theorize that aluminum bikes won't be able to handle the torsion exerted on the frame. All in all when I was riding problem free I was cruising at low rpms going about 25. Before I installed the kit I would be going about 15 MPH at the same rpms. So make sure you know what your doing and that you have all the necessary tools and that your bike can handle insane torque. Be safe... I think I might be able to go 55 MPH when I get the kinks worked out. (Posted on 10/23/12)

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Q: Would like to see a video on assembly and how it works.

Posted On: 6/25/14 By: fred

A: We appreciate you contacting us here at BikeBerry.com with your questions and concerns! We are definitely working on a video for that assembly, so check back with us soon and hopefully we will have it all done!
Q: If im using a jackshaft kit do i still need to use the sprocket that came with the 80cc kit? When using the jackshaft kit and the motor is running does the pedal also turn?

Posted On: 6/2/14 By: timothy hamilton

A: Those are great questions, and we appreciate you contacting us here at BikeBerry.com! Since the Jack-shaft kit makes it so the motor is fit to be installed on the left side of the mike, to use the bike's gears, you would no longer need to use the 44th sprocket from your engine kit. Yes, you are still capable of pedaling with the Jack-shaft kit. Please feel free to contact us Monday-Friday 8:30am-5:00pm PST, 1.800.317.0479.

Have a question? Call 800-317-0479
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