Site Information

 Loading... Please wait...
  • Image 1

**2 Stroke HD or UHD Shifter Kit


Product Description

Shift Kit-the ultimate in shifting technology



This HD Shift Kit will fit almost any Chinese 2 Stroke and allow the user to shift gears using the bike's standard rear derailleur. This and our Standard kit 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 the standard kit.

The difference between HD and standard kit: HD kit comes with our specially designed Heavy Duty Freewheel for those more aggressive riders and engines with compression mods.

The HD Shift kit also now comes standard with the complete 131.5mm Bottom Bracket Cartridge

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, cartridge bottom bracket tool and crank tool to install this kit.

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

Write Review

Previous | Showing reviews 21-37 of 37

  1. 5 Star Review

    Posted by on 12 29 2012

    2 thumbs up! I originally ordered a kit from for a lower price and the kit was crap from shipping to install nothing worked at all total false advertising i was very frustrated. Sick bike parts definitely came through just opening the box i could already tell the difference in quality and care. definitely worth the extra buck. Im stoked on this kit and will post pics of the new build. Thanks guys i will be coming back again

  2. 3 Star Review

    Posted by on 10 23 2012

    I am kind of confused,When exactly did this kit turn into a stamped steel piece of crap? Every video on you tube shows this beefed up kit that makes this hd kit that i received look like a toy,Quite dissappointed.

    SBP Response:
    None of our parts are "stamped steel", laser cut and powder coated American made steel. The design and components have not changed since we improved the design with the one piece rear bracket in June 2010. Sometimes a products performance is more closely linked to the operator/installer than the product itself.

  3. 5 Star Review

    Posted by on 08 16 2012

    Entire day project, but only mods to the kit I did with a rat tail file and a hack saw. My chains never derail and my bike is 11mph faster than it was with the 44 tooth fixed sprocket. Very fun to ride a bike with gears and not to mention the bike is more manly looking with the way the chains run around. Also loved the 2 day shipping from WA to VA.

  4. 5 Star Review

    Posted by on 06 26 2012

    This kit is a must for anyone that rides on a regular basis. You can climb any hill and still hit the higher speeds. Saves the motor from being wound out all the time. It is worth every penny

  5. 5 Star Review

    Posted by on 06 10 2012

    Just got the hd shift kit and spent the day installing it, not an easy project, but a good project. Spent extra time making sure everything was perfect while doing it, and it operated perfectly the first time out. Had to fabricate my own spacer block to get a proper fit on left-side chain(one in the kit too big for my motor) ,but that was it. Very pleased that it works and shifts flawlessly. Thanks you guys.

  6. 5 Star Review

    Posted by on 05 13 2012

    very good product... thanks to God there is Sick bike parts for us!

  7. 5 Star Review

    Posted by on 05 06 2012

    A few things you should know before buying this kit:
    1) You may need to make a trip or two to the bike shop.
    2) Beach cruiser frames are harder and may require more work.
    3) This is by far the best thing I have ever put on any of my bikes! You will never regret this purchase.

  8. 5 Star Review

    Posted by on 04 09 2012

    i bought this shifter for my custom 6 speed stretch limo trike im building, and once again sick bike parts has the best parts at the best prices and super fast shipping.. thanks again for your service, i will be buying more items...

  9. 5 Star Review

    Posted by on 08 27 2011

    Bought this shift kit and put it on my 7 speed mountain bike.
    it is the greatest upgrade ive installed. nothing can beat the fun of shifting through the gears, gives you the real racer feel. and best of all you dont have to settle with only acceleration or only top speed. all i have to do it kick off the ground and the engine is capable of accelerating in 1st gear without bogging out. so far with my stock engine i hit 38mph flat ground.which is pretty fast for these things.the only way your hitting those speed stock is with a 32 tooth sprocket. anyone who says other wise about going above 33mph with a 44t sprocket is lying. check your calibration and go try again. i can go 0-20 in about 5 or 6 seconds. it is expensive but once you try it out youll understand why.

    planning on getting slick tires and the expansion chamber soon.

    youll have so much more fun and enjoyment when riding.

  10. 5 Star Review

    Posted by on 07 04 2011

    I like the new mounts that bolt around the seat tube rather than bolt to the engine sidecases.Much easier to install and cleaner lokking as well.The chain between the jackshaft and crank freewheel stretches very quickly.When you replace the chain invest in the best one you can buy(I am pleased with my Izumi BMX track chain,$55 but worth the money).If you are running a pull start,a spring tensioner will reduce the time you spend raising the motor to tighten the chain.I like the tensioner that is incorporated into the new style mounts,but it is still a pain to constanstly have to loosen the engine and raise it up to adjust the chain tension.The KMC X8 chain that SBP sells works good for your derailleur chain.I am using my shift kit with a Nuvinci N360 hub transmission.It is much smoother than using the bicycles gear cassette.The nuvinci eliminates the banging and jumping shifts that you sometimes get with the bikes gear setup.By reducing the shock loads of harsh shifting you greatly reduce the wear on your drivetrain(chain,sprockets,freewheel,etc.).This shifter kit is a very wise investment for your MB project.

  11. 5 Star Review

    Posted by on 06 12 2011

    this kit takes moterbicyling to a new level ,it far exceeded my expectations it works perfect ,very high quality,thanks sbp

  12. 5 Star Review

    Posted by on 05 26 2011

    i am very impressed with this product. i ride 17 miles to work in Los Angeles at least 4 days a week and only buy about 2 gallons of gas because of this product and it's ability to allow a 200 lb man on a bicycle to climb hills at close to 20mph. i have officially gone 45 mph on this bike now and could not imagine doing that on one of my buddy's single gear china girl board trackers. i have registered it as a moped and plan on buying a second shift kit to build a full suspension cruiser. every forum i am on has proof of this amazing products ability to out perform any other similar product available today. i have even rattled 10-20 different parts lose riding this thing, not one of them related to the shift kit (mostly gas tank screws and fenders until i found some loctite). the few places around here that carry gas bike stuff get a serious ear-full when i hear they don't carry these in store. the store owners don't like the look on the customers face when i start recommending they look this site up asap. at least once a day a complete strangers stops me and has me explain what the shift kit is which lights up their faces at the thought of it working the way it does. i could go on for days about this, it has changed my views of city travel and made my commutes the 45 minutes i enjoy most about my day. i even ride it all day on my days off. amazing and well worth the money!

  13. 5 Star Review

    Posted by on 04 27 2011

    is the best invention for the bicycle engine and the service is very good, and shipping it is fast. sbp the best *******

  14. 5 Star Review

    Posted by on 04 10 2011

    hi placed a small order for a freewheel sprocket and tool forgot plugs e/mail the boys no problem added to order plugs arrived first the rest followed in double time all as ordered

    pleasure todo bussines.

    cheers alex from the land of OZ

  15. 5 Star Review

    Posted by on 07 23 2010

    LOVE IT best thing you could do for your bike and engine.

  16. 5 Star Review

    Posted by on 07 08 2010

    I own a Motorized Bicycle Shop, and thought I could BETTER the instructions Jim, and Pablo gave me. However I found everything I thought I could do BETTER, DID NOT!!!!!! work out, I had to follow the instructions to the letter. This is the MOST fantastic shifter I have EVER used, and I have used a lot!!!!!
    Jim Randolph,

  17. 5 Star Review

    Posted by on 06 28 2009

    The shift kit is the best mod you can do to the bike. The wide range of gears keeps the little engine in a happy RPM range at all times. The regular one speed sprocket is either lugging off the line, or screaming at the top. This kit overcomes all of that, and I am sure engine life will be enhanced. It is all quality parts, and excellent support from the SBP. Stop reading this, and go buy one! I use mine like a 4 speed, basically shift 1-3-5-7, and use 8 as an overdrive. So far I have hit 46 MPH with some left to go!

Previous | Showing reviews 21-37 of 37

Find Similar Products by Category

Click the button below to add the **2 Stroke HD or UHD Shifter Kit to your wish list.