Shift Kit-the ultimate in shifting technology
MADE IN THE USA - we encourage you to compare to inferior imported kits, often at higher prices!
This kit will fit almost any stock, unmodified Chinese 2 Stroke bike engine and allow the user to shift gears using the bike's standard rear derailleur. This and our HD kits are what you see in the YouTube videos. Take a look at the parts list in our installation manual to see what we supply in this kit - but please note it now comes with a full bottom bracket cartridge rather than just a spindle. This 131.5mm cartridge is much easier to install.
NOTE: This kit is not designed to work with the slant plug head engines. It is for 2 stroke engines with standard compression ratio straight plug head and is supplied with a standard front freewheel. If you have a slant head or raised compression engine, or a 66+cc engine you must use our HD kits or HD freewheel.
Note that this kit comes with typical mountain bike style crank arms and requires 9/16" pedals. If you have a one piece crank you will need a bottom bracket adapter and most likely will need to purchase new pedals.
Here are links to additional information, read carefully before purchasing:
SBP also suggests a chain breaker and crank removal tool for this installation if you do not already own them.
Do not forget to measure your seat tube and select the appropriate size.
NOTE: If you are attempting to use this kit on a "FAT TIRE" bike please contact us directly. This kit is based on it being installed onto a "standard" bicycle. Fat Tire bikes may have special needs.
PLEASE CONSIDER THE SBP EXPANSION CHAMBER, CDI AND OTHER PERFORMANCE ACCESSORIES WITH YOUR SHIFTER KIT
works great, and well made
Posted by kyle on Oct 29th 2017
I bought this kit after wasting about 2 weeks on trying to get an eBay kit to work, and the difference is obvious right out of the box. The sick bike parts shift kit comes with a one piece engine mount vs the China kits 3 piece that’s moves every time you pedal and Wacks out your chain tensions. Basically everything in the sick bike parts kit is much better quality, when my kit arrived it only took me about 3 hours to install vs the two weeks I wasted screwing with the China kit and still couldn’t get it to work. And the customer service at sick bike parts is second to none, I installed my kit on a mongoose dolomite fat tire bike. I emailed their tec guy asking him which extra parts I was going to need for my project and he sent me a list of everything i needed within 30 minutes of emailing him. This is a great company, you can’t go wrong!
bikes with motors
Posted by RMG on Aug 15th 2017
awesome kit! arrived quickly and quality is better than the
pictures show. two day install bike is running great with the SBP shift kit!!!
Posted by mike on Jun 20th 2017
Quality parts in package easy to install with there online instructions will b buying more parts
Posted by Juan Barrios on Sep 26th 2016
Que necesito si tengo una bisicleta fat tire?
You might need a longer shaft, but our new kits come with a 6" shaft
Posted by Juan Barrios on Sep 26th 2016
Tengo una bisicleta fat tire que necesito comprar para el quitar de cambios
I have a fat tire bike I need to buy for changes
Posted by Samuel Sullivan on Jun 21st 2016
Everything that comes with this kit is good. The only thing I advise is that you spend the money for proper tools. Also the freewheel that comes with this kit may be okay with the smaller 49cc engines without modifications. Also keep in mind that I wouldn't recommend jamming the freewheel by pedaling with force and then releasing the clutch lever as this may put unnessesary wear on the ratcheting part of the freewheel. I would load the freewheel first and then use the nessesary force once its loaded. The manuals posted to this website are a valuable resource and should not be taken for granted. I highly recommend sbp shift kits!
Posted by Kenneth Robinson on Jul 25th 2012
Love the product, but you might as well stop selling the standard kit. Blew out the standard freewheel bearing on the first day. Now I'm waiting on a heavy duty and removal tool before I can ride.
Posted by Jonathan Foster on Feb 3rd 2011
Excellent product, however make absolutely certain that you check all of the mounts to be certain they are all tight every time you ride for the first week.. After 3 days riding on it and checking each day (except the 3rd day) my top mount to the seat post had worked its way loose and bent the frame for the shift kit causing my freewheel to bind up. That was completely my mistake (I think.....) so now I have to get the freewheel removal tool and a new freewheel, possibly a new shift kit frame as well if I'm unable to straighten this one out.. Just make sure you check it every time you go out to ride until all of the chains are broken in and stretched out and you should be fine.
Posted by Jose Padro on Aug 30th 2010
It's a great product. Great invention. I can't wait to build/use the new shift kit. I was hoping to offer a suggestion:
My suggestions (would be nice) if the kit would have a free wheel in the sproket on the motor side. that way, you won't feel any resistence from the motor when your peddling. Also to have pull start. That would be my suggestion.
Posted by norm crispin on May 12th 2010
Good kit, but after trying to save money with this kit had a freewheel failure. So any money saved was lost when I upgraded to the HD freewheel & tool. I suggest u buy the HD version.
Posted by LeRoy Kraster on Jun 15th 2009
Lower price? Same GREAT stuff. In fact now they include the chain tensioner. Awesome, but first shift kit is still fine, but rather than transfer it to my new bike, I just bought a new shifter kit.
Posted by Matt Lee on May 20th 2009
This kit is worth every penny that you will pay for it. Built very well, installs easily (with mechanical common sense) and takes a lickin and keeps on tickin. Paul and Jim have put a lot of thought into this kit and they stand behind their products. The only thing that I have to add is, pop for the extra 30 bucks and buy the deluxe kit because you will just come back and buy the extra parts in the future anyway, I know cause I did and would have saved all that time I wasted staring at the mail box waiting for it to arrive and used it riding my bike.