Chain size for 70cc Chinese

Discussion in 'Motorized Bicycle General Discussion' started by frenchman159, Apr 29, 2008.

  1. frenchman159

    frenchman159 New Member

    Joined:
    Apr 19, 2008
    Messages:
    44
    Likes Received:
    0
    Thanks for all your help, love reading the great tips and tricks !! I was hoping somebody could tell me the exact size of the chain on my 70cc ?? Moved the engine onto another bike and you guessed it- too short!!-. No markings can be seen anywhere. Thank you in advance......
     
  2. paul

    paul Active Member

    Joined:
    Dec 23, 2007
    Messages:
    5,536
    Likes Received:
    10
    it is a 415 however a #41 will work great with a motorized bicycle which you can get enough for 2 chains from most any farm supply store for around $13.00
     
  3. frenchman159

    frenchman159 New Member

    Joined:
    Apr 19, 2008
    Messages:
    44
    Likes Received:
    0
    Funny you mentioned that, I found some 41 in the shed and seems to fit just fine. The only thing is that its a little wider than the original. I imagine it may slide back and forth on the sprockets making a small groove on the engine case over time. I'm I correct to think this ? Or do they make a narrow 41 ?
     
  4. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

    Joined:
    Jan 8, 2008
    Messages:
    11,529
    Likes Received:
    4
    If your chain run is straight it should stay pretty much in the middle and not cause any problems with the cases.
     
  5. paul

    paul Active Member

    Joined:
    Dec 23, 2007
    Messages:
    5,536
    Likes Received:
    10
    actually no for i checked mine. i think the wider gap is an advantage for it is next to imposible to mount the rear sprocket on your spokes and have it perfect so thier is a little wabble and the chain is able to stay straight with the little play that is now allowed. i got a lot of miles on that 411 chain and have checked every thing. i keep hearing of others having thier 415 chain brake including mine so they are not to good. the advantages of the 411 chain is the extra gap, a heck of a lot cheaper, i think it is made of a better grade of steel so stronger, its readly available along with the parts for them. the 411 chain is a perfect match for the motorized bicycle in my opinion
     
  6. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

    Joined:
    Jan 8, 2008
    Messages:
    11,529
    Likes Received:
    4

    That makes perfect sense.
     
  7. frenchman159

    frenchman159 New Member

    Joined:
    Apr 19, 2008
    Messages:
    44
    Likes Received:
    0
    Checked it out and it runs smooth on the sprockets. 41 it is !!! Thanks again for great info !!!
     

Share This Page