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Standard 2 Stroke Shifter Kit


Product Description

Shift Kit-the ultimate in shifting technology


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.

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 most likely need to purchase new pedals.

Here are links to additional information, read carefully before purchasing:

Product Description
Requirements for using the kit
Bottom Bracket Descriptions
Installation Manual

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.


Product Reviews

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  1. 5 Star Review

    Posted by 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

  2. 5 Star Review

    Posted by 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

  3. 5 Star Review

    Posted by 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!

  4. 5 Star Review

    Posted by 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.

  5. 4 Star Review

    Posted by 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.

  6. 5 Star Review

    Posted by 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.

    Thank you

  7. 4 Star Review

    Posted by 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.

  8. 5 Star Review

    Posted by 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.

  9. 5 Star Review

    Posted by 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.

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