Clutch 40 tooth W/clamshell

Discussion in 'Transmission / Drivetrain' started by mrbg, Nov 19, 2015.

  1. mrbg

    mrbg Member

    just finished up installing 40 tooth w clamshell I took for a ride about a mile, ran good with the new pipe and airfilter. When I got close to home I wound it out and I heard a clunk clunk, pulled the clutch in cause I thought I threw the chain. Motor was still running so I killed it. It'll roll about 10' and then lock up got it home pulled sprocket cover no problem there it was getting dark so I didn't have a time to pull clutch cover. A buddy of mine had same problem with a 36 t he said it was a sheared key I think but I can't get ahold of him. Anybody have a similar problem? Suggestions welcome, motor is just broke in
     

  2. crassius

    crassius Well-Known Member

    could be as simple as too much chain slack - if it is more serious, then opening both covers and rolling bike forward with the spark plug out will show where the problem is
     
  3. mrbg

    mrbg Member

    Thanks
     
  4. mrbg

    mrbg Member

    Well I removed both covers and the plug I can't see anything visibly wrong. It rolls forward and backward about 10' with the clutch in and out, its gotta be something on the clutch shaft?? What do you think?
     
  5. mrbg

    mrbg Member

    It was something simple, the cotter pin on the half link of my chain fell out and the pin was hitting sprocket cover. I'm lucky it didn't fall out
     
  6. crassius

    crassius Well-Known Member

    yes, I've seen a chain snag rip the back off the motor
     
  7. mrbg

    mrbg Member

    Well I like the 40 tooth it works good with the longer header expansion pipe and better air filter I put on. It's all lowend power and the stock 44 T.didn't work. It'll cruise at 25-27mph without straining the motor now.
     
  8. mrbg

    mrbg Member

    Anybody have a trick for setting up your chain so you don't have to use the tensioner/roller I got lucky on my other bike I didn't have to mess with the bicycle chain. I put the 40T on another bike and I was trying to set it up with having to resize bicycle chain. I have a chainbreaker and lengths of chain for both sides.Does anyone have a good way of doing it? Or maybe one of the springloaded jobs off the sprocket cover?
     
  9. crassius

    crassius Well-Known Member

    I don't like spring tensioners - fairly easy to make some spacers to adjust motor position to get chain right
     
  10. mrbg

    mrbg Member

    Ya I checked out a couple of posts on the spring tensioner so that's out. The stock setup works good, I just want to run without it. Bike is a strandcruiser so I could set up the chain motor right on, and cut the pedal chain or run the tensioner on that side I guess. Why don't you like coasterbrakes? Mine are setup with a front disc the coaster is more like a emergency brake granted there's more service on them but with clamshell its not bad.
     
  11. crassius

    crassius Well-Known Member

    coaster brake isn't too bad of one doesn't use it, but on rough roads it can be hard to get pedal to bottom so one can stand on it a bit to avoid a butt pounding, and on uphill starts. it can be hard to get it in right place to start pedaling hard
     
  12. mrbg

    mrbg Member

    Ya my days of dirt bike riding are over, so the layout of a strandcruiser is more comfortable than the mountain bike layout. My 2nd bike I built was on a specialized w cruiser bars much lighter bike, but it broke at the seat post tube at MMnt after a year of daily commuting 30 mi.I've thought about building another on a 24" frame w 26" wheels if that would work.
     
  13. crassius

    crassius Well-Known Member

    there are both huffy & schwinn from china with very small 26" frames that have 7 speeds & real brakes
     
  14. mrbg

    mrbg Member

    Ya I'd probably be looking for a used bike, I'm kind of setup for cruiser bikes with the spare parts I have. I have a older Schwinn cruiser 5 speed that I was going to build but frame diameter is 15/16" and I'd have to do some work for motor mounts and I like having it for the times I want to just pedal. So the smaller mtn bike is just a thought.
     
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