Jackshaft SBP Shift Kit

Discussion in 'Transmission / Drivetrain' started by TheMotheMan, Jun 6, 2009.

  1. TheMotheMan

    TheMotheMan New Member

    Just wondering how the more experienced guys feel about this shift kit?

    I have watched some vids on Youtube on them and they seem to perform well, but I would like some input on this. Also, being new to this I am not sure but with the twist throttle, I'll be stuck with either a thumb shifter on that side for the rear or just using my mid gear sprocket in the front and a twist shift on the left bar for the rear when I'm peddling. Am I correct on this?

    I placed my order yesterday at dax, I'm excited for this thing to arrive, though I know i'm probably a week or more away from it, I've started fixing up my mountain bike, she needs new cables, housings, brakes, mirror, lights front and back, a new seat, apparently my butt has gotten bigger over the years...I rode it for 10 min yesterday and I'll tell ya I won't be doing that again...It's an exit only. But I am very excited about this endeavor, however the better half thinks I am just a big kid.......YEAH BUDDY!

    Anyway...I hijacked my own post LOL...SBP shift kits, yea or neigh?

  2. bluegoatwoods

    bluegoatwoods Well-Known Member

    I don't own one and I've never ridden one, but I have seen a lot of praise for the kit. I don't think I've come across anyone who is unhappy with it.

    You'll lose your front derrailleur when you mount your engine. So you're right thinking that you'll just have your chain on the middle chain ring. (though the others are still usable. You just have to move it with your fingers. Bike standing still, of course.)

    As for shifting, I simply used the old ten-speed style stem mount shifters. This allows you to shift with either hand as well as cutting down on handlebar clutter.
  3. HseLoMein

    HseLoMein Member

    I have a shifter Kit with a twist shifter, i love it it is much better than a thumb shifter, have the throttle and shifter on the same side makes you take your hand off the throttle to shift, it makes shifting smooth and nice
  4. Skyliner70cc

    Skyliner70cc Active Member

    Nothing bad to say about the 5 bikes I've built with the shifter kit. 2/3 of my personal rides have a shifter kit. The 3rd ride can't have one because the engine is mounted with a bolt through the frame.

    I will never build another MB without a shifter kit install.
  5. lordoflightaz

    lordoflightaz Member

    Love the kit, except when I am on my other bike, I try to shift and nothing happens, LOL
  6. Shadeslay

    Shadeslay Member

    I still maintain that it has been the best upgrade I've done. It is more then most motors, but I figure for the most part it will last longer then my engine "I may have to replace the bearings or freewheel later" but everything else should last some time. I just love flying through the gears. :whistling:
    Last edited: Jun 7, 2009
  7. TheMotheMan

    TheMotheMan New Member

    I'm contemplating getting one, but the price right now is what is deterring me from doing it with how things are. $$ gets tight at times, hence the reason for motorizing my bike. I hope to save some $$ on my drive to work which is short, only 7 miles 1 way, which isn't that hard since most of the way it is fairly flat and straight. I just, today, put a different fork on my bike, but I do not think it is going to help me any. I took the fork from another mountain bike that had shock absorbers on it, but I do not think they are any good as they absorb shock just fine on the way down, but they do not rebound back up...It was off a bike some people that rented from us had left. I have another bike at another place we have that I may steal the fork from, I know those shocks work very well, however it will add quite a bit of weight to the bike due to that fork being a spring shock, but I know in the long run it will save on my arms and wrists.
  8. YES YES YES TO SHIFTER KIT! I have built a 2nd bike as a single speed and it is very frustrating twisting the left grip trying to shift! Lower vibration at any given speed, increased top end and if you stay out of the throttle (I do NOT) and better gas mileage. I still get 90-105 miles to gallon while averaging 26.7 miles per hour. Bike computers are fun and informative.
  9. i dont have a shift kit and only a single speed, i get 180-200mpg and up to 35mph with a 44t sprocket,and i cut most of the vibrations using rubber between engine mounts and bike frame.
  10. give me vtec

    give me vtec Active Member

    that is how mine is set up... love the kit. highly recommended... great customer service.
  11. bootlegger

    bootlegger Member

    The site I have been checking out says they are out of stock. Were else can you buy one from?
  12. Pablo

    Pablo Motored Bikes Sponsor

    We will have stock this weekend. You can place your order now. Thanks!
  13. MikeJ

    MikeJ Member

    I am down to the last few actions for finishing installation of my shifter kit from SBP. I backed off of eating out and cut back on some vices and saved my money. Pay someone else to do the engineering work, make expensive mistakes and iron out the bugs before you get the kit, proven to be complete. If you have mechanical engineering ability and some fairly hefty machine shop equipment and lots of time, go for it. But if you want to ride some proven hardware, buy a kit. In the long run, I think you will save money and the hard work has been done. Read the on-line instructions completely; don't worry if you don't understand everything. Put in a couple of full weekend days and you could be done, riding with the best of the crowd.
  14. Hawaii_Ed

    Hawaii_Ed Member

    Yup, sick bike parts is the only source for these, and they are worth it!

    DJEEPER Member

    DO IT!

    they have FAWESOME customer service too! (THANKS JIM!)
  16. Fabian

    Fabian Well-Known Member

    Hi MotheMan

    I have only one thing to say - Just get yourself a SickBikeParts Shifter Kit - you will thank yourself for doing so.

    I have one of their kits installed on my bike and it is sensational!

  17. MikeJ

    MikeJ Member

    Get their kit.. You will never regret it.

    Here is a tip... Use light touch of Locktite on the mounting bolts. I went for a ride today, intending to rack up another 125 miles or so. After getting started, I noted the bicycle frame and engine were vibrating, shaking much more than normal. I finally stopped before a catastrophic failure occurred. I found one of the bolts mating the shifter kit frame (vertical piece) to the engine mount casting had almost completely vibrated loose and unscrewed itself about eight full turns. That is a lot.

    My bike is now at home, where it will receive a full mount bolt check, each one of them. If I can clean out the threads with brake cleaner, I am going to Blue locktite those bolts. I think Green Locktite would be better, it holds the bolt from twisting out, but will not make it nearly impossible to back out the bolt when I want it to back out (Blue Locktite has that characteristic).

    Understand that you may have to get to them someday yourself to tighten them down.

    My bike has over 500 miles on it. If I can tighten those bolts, maybe tomorrow it will return with over 625 on the odometer.

  18. MikeJ

    MikeJ Member

    Just for future reference on this shift kit...

    I had to remove the jackshaft assembly to get to the engine-mount bolts (5 mm hex wrench required). Both bolts had gradually worked loose during the previous 500 miles of riding; the engine shook really badly during riding because they both were so loose.

    The small tooth sprocket (1/8 inch hex wrench required) refused to budge when i first tried to remove it; blue locktite locked it into place. Rather than me beat on it, I used a 3-arm gear puller; I use the puller to remove timing gears off Chevy engines. It worked great and did not abuse the other shaft components.

    After removing the clutch arm side of the frame, push the jackshaft backward toward the tire, and it comes right out. I did not have to loosen the big sprocket nor the locking collar. With the shaft out of the way, getting to the 5 mm hex wrench bolts was really easy. It also made cleaning to factory-new condition and inspection of the shaft equally easy. This time, I made sure the small sprocket was not locktite'd like it was during the first build.

    Last edited: Sep 20, 2009
  19. Fabian

    Fabian Well-Known Member


    On small screws and even medium sized screws, use a low strength threadlock, like Loctite 222.
    I have found this has plently of holding power and it is used everywhere on my SickBikeParts Jackshaft Shift (shifter) Kit.
    If you need to remove parts, the fastening nuts and bolts can be removed without heat being applied.

    At the worst case scenario where nuts and bolts are coming loose with Loctite 222, you can always increase the holding power by using medium strength Loctite 243.
    Use caution though with Loctite 243 as i've found it's holding power to be far stronger that the word "medium" would suggest, and on small screws/nuts you may need to use "heat" to soften the Loctite for parts removal.

    Attached Files:

  20. MikeJ

    MikeJ Member

    Fabian is right.... I was a little confused, then I did a search on Loctite. At least 9 different products with different characteristics appeared. Some are high temperature tolerant. Some are for cylinder fittings. Purple and green are for low-strength needs. Red is for permanent fasteners. I have a bottle of 246, but it does not list. So don't get hung up on one number. Read the Loctite site and get smart about their products, then choose between green, purple, and blue. Personally, I am staying away from red Loctite.