Sprockets My Staton Freewheel Sprocket Disintegrated!

Discussion in 'Transmission / Drivetrain' started by 5-7HEAVEN, Jan 8, 2009.

  1. 5-7HEAVEN

    5-7HEAVEN Guest

    I've been riding "The Iron Dragon", my twin-engined monster daily for three months, about 500 miles. Yesterday on my way home, the engine on my Staton rear chain drive unexpectedly jumps into neutral at 25 mph. I coasted to a safe stop, lifted the bike onto the sidewalk and assessed the damage...

    The 16tooth freewheel sprocket fell apart, and all the bearings were gone!:detective:

    Soo, I turned the rear engine off, and motored home at 20 mph with the front engine.

    The day before, the rear engine had started to surge and the chain had slackened. I thought it unusual that the chain was loose after several hundreds of miles' service. I made a mental note to check everything this weekend, but the sprocket expired yesterday. That must've been the reason the chain was loose.

    I emailed Dave Staton, and am awaiting his reply.

    Has this happened to anyone else with the freewheel sprocket on the wheel hub?:confused:
     

  2. ZnsaneRyder

    ZnsaneRyder Member

    I was wondering about those freewheels. I am thinking about getting one in the future for a plastic wheel I got from them, but I may need 2 or more if they break like that!

    Only 500 miles, OUCH. I get more than that out of some of my belts.
     
  3. DetonatorTuning

    DetonatorTuning Active Member

    5-7,

    i had a freewheel give out when i was running the inside drive. it was the one on the output shaft though and that was from bad chain line. the wheel mounted freewheel was still fine.

    can be aggravating but they need to be in absolute alignment to last.

    sure was nice to have the front drive to avoid pedalling all the way home , eh !?!

    steve
     
  4. 5-7HEAVEN

    5-7HEAVEN Guest

    Chain alignment? That's interesting.

    Znsane, Staton offers a 24tooth solid sprocket, no freewheel, to mount onto their hub. You'd have to factor in the difference between 16t and 24t, which is a lot.
     
  5. SirJakesus

    SirJakesus Guest

    This is the first time I've heard of one of the staton lefthand freewheels blowing out like that after so few miles. Hopefully he'll give you a steal of a deal on another one.
     
  6. ZnsaneRyder

    ZnsaneRyder Member

    That's true, I just wish they sold a 44T or 48T freewheel, or even a 24T freewheel, so I don't need large sprockets and added complexity on a jackshaft to make the proper gearing work. I bought a Bicycle-Engines.com 48T freewheel, but it turns out that it's slightly bigger than the staton threads, and does not fit, without machining new threads to the unthreaded part of the staton hub. Bicycle engines only sells hub kits for spoked wheels, and I DO NOT want another spoked rear bike wheel, as I can't even get a non-driven spoke-wheel to last long. I see they also sell 5/8 shaft hub adaptors, so maybe another option is to have the 24T solid wheel sprocket, with a 16T freewheel on a jackshaft instead, and a large reduction sprocket.

    5-7, I hope your new freewheel lasts longer, as 500 miles can be done in under a month if you ride enough.
     
  7. DetonatorTuning

    DetonatorTuning Active Member

    might put it down to poor chain management on my part, i was running with out any form of tensioner or guide for a while and i suspect the lateral slop was a big contributor.

    steve

     
  8. frameteam2003

    frameteam2003 Member

    Those freewheels are really just A S Claws southpaws.I think White also sells a southpaw but their cost a lot more.The really cheep freewheels use spacers to take up where some bearring should be.
     
  9. Accender

    Accender Member

    I would like to see a picture of you twin moto bike.
    I looked in the pics section but could not find it.

    ps: sorry about your free wheel.

    A
     
  10. 5-7HEAVEN

    5-7HEAVEN Guest

    My son came home Thursday, will live with us for four years until he gets his degree. He met "the Iron Dragon" and can't wait to ride it. Daughter wants to ride a bicycle to her community college seven miles away.

    :idea:I'll start them both on pedal bikes.:scooter:

    Come Monday, I could use a motorized bike to commute to work until I replace the freewheel sprocket. I MIGHT install a Mitsubishi rear friction drive with 1.5" roller back on "The Dragon Lady". I ran that combination several months ago.

    No word yet from Staton. I'll talk to him Monday morning.


    Accender, were you with the 82nd Airborne Division? I was in Southeast Asia with the 101st Airborne Division in 1967...1968...1969.:cool:
     
  11. ZnsaneRyder

    ZnsaneRyder Member

    Is it best to email or call Staton??? I just looked around on their site, and the 24T LEFT thread sprocket isn't there anymore. I have seen it before. All I can find now are 2 16T LEFT freewheels, but one is thicker than the other, so it probably would be best to have the thicker one. I may just go with one of those thick 16T's on my new bike.

    5-7HEAVEN,
    Is this your freewheel???
    http://www.staton-inc.com/Details.asp?ProductID=3199

    Or do you have the thinner one for 410 chain?
    http://www.staton-inc.com/Details.asp?ProductID=2356
     
  12. Mountainman

    Mountainman Active Member

    THINGS may have changed at Staton
    but - back a while when I was trying to get in touch with then
    e-mails were very slow
    phone seemed to be the best

    ride that MB THING
     
  13. 5-7HEAVEN

    5-7HEAVEN Guest

    Is it best to email or call Staton??? I just looked around on their site, and the 24T LEFT thread sprocket isn't there anymore. I have seen it before. All I can find now are 2 16T LEFT freewheels, but one is thicker than the other, so it probably would be best to have the thicker one. I may just go with one of those thick 16T's on my new bike.

    5-7HEAVEN,
    Is this your freewheel???
    http://www.staton-inc.com/Details.asp?ProductID=3199

    Or do you have the thinner one for 410 chain?
    http://www.staton-inc.com/Details.asp?ProductID=2356
    __________________

    Best to call, Znsane. I need to call him tomorrow.

    I use the thinner freewheel, although on my 20" Dahon I used the thicker freewheel sprocket. Unsure why I switched to thinner sprocket, but gears and chain are more readily available with thinner one. If you experiment with multi-sprockets on the Staton drive box, thinner sprocket is the way to go.
     
  14. 5-7HEAVEN

    5-7HEAVEN Guest

    Creating "The Dragon Lady"

    One thing leads to another.

    It will take a few days to contact Dave Staton and have a new freewheel sprocket flown in.

    Soooo, I might as well strip down "The Iron Dragon" to original. Then I'll have a front suspension fork installed. To reinstall the front friction drive assembly onto a suspension fork, I'll need to bolt this on to secure the front support rods:

    http://www.amazon.com/Delta-Rack-Shock-Treatment-Bicycle/dp/B000ACAMHY



    Then I'll connect a Staton REAR friction drive with 1.375" roller and 6hp Polini engine onto the FRONT fork.

    While "The Iron Dragon" is down for repairs/renovation, "The Dragon Lady" is being created. Today I removed the front friction drive assembly. Since "The Dragon Lady" has a suspension fork, I used the abovementioned rack to help install the front drive assembly. However I installed a pocketbike engine up front and bolted on a Staton rear drive with 1.5" roller and 2.2hp Mits engine.

    The pocket bike 49cc engine has reed valves, Rockitt timing key, 14/14 Dellorto replica carb and ADA expansion pipe. With a 1.25" roller, this engine should push the bike to 35 mph at 11,250rpm.

    At 35mph, the Mitsubishi engine with 1.5" roller should be turning 8900rpm, which should be close to its rpm limit.

    This is my "back up" bike until "The Iron Dragon" flames on again.:tt1:
     
  15. ZnsaneRyder

    ZnsaneRyder Member

    You have a lot of engines!
    No downtime for you!!
     
  16. 5-7HEAVEN

    5-7HEAVEN Guest

    Yeah Znsane, that's probably why I lean towards building twin-engined monsters.:tt1:

    "The Dragon Lady" is completed. Just need to fill both tanks and fire up. The PB engine has never been run so I'm anxious to see how it performs.

    I might install a Happy Time reserve tank to feed both engines. Because of the girlie frame the tank sits below the pocket bike engine. I'll neet a petcock to prevent its goped tank from backfilling the reserve tank. I'll also need a siphon priming rubber squeeze bulb to transfer gas to the goped tank.

    With the modified pocket bike motor, this monster should be faster than my other twin-engined bike.:devilish:

    It's 740am, time to call Staton.
     
  17. 5-7HEAVEN

    5-7HEAVEN Guest

     
    Last edited by a moderator: Jan 12, 2009
  18. ZnsaneRyder

    ZnsaneRyder Member

  19. 5-7HEAVEN

    5-7HEAVEN Guest

    Well I called Dave Staton on Tuesday and the package arrived the next day. The broken sprocket was removed and the new one screwed on in two minutes.

    I stripped "The Iron Dragon" of engines and all motorized parts. When my suspension fork arrives, then I'll reinstall everything. The new fork needs front pannier racks to secure the Staton friction drive support rods but it's a piece of cake to install.

    In the meantime, the rear engine of "The Dragon Lady" fired up effortlessly, but the pocketbike engine wouldn't start. At the last moment I realized that the rear Mits engine used 50:1 fuel/oil ratio and the pb engine ran 25:1 ratio.

    Doh!:jester:

    I squirted extra oil in the pb engine tank. It should've started but it didn't.

    Then the plastic pull start pulley jammed under the cover.:confused:

    Tomorrow's another day.

    :idea:I'll fit the front side-pull brakes on the coaster brake wheel rim. What I'll do is bolt the brakes with an aluminum crossbar. If all lines up and the brake works, then all's good.

    Bike shop owner said the seat stay frame's gusset was too far from the rim to install the center-pull. She was correct UNLESS you fab a bracket closer to the rim(which of course the shop would not/could not do).
     
  20. SirJakesus

    SirJakesus Guest

    You've been hiking into the mountains and smoking that devils weed again haven't you 5-7 :)
     
Loading...