OP Roller...need some help!

Discussion in 'Motorized Cruiser Bicycles' started by CardInSpokes, Jun 20, 2011.

  1. CardInSpokes

    CardInSpokes New Member

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    Hi all! I'm installing a 49cc Skyhawk kit from gasbikes and I have a few questions on the rear sproket / rag joint assembly for this particular bike:

    With the two rubber gaskets sandwitching the spokes the sproket will no longer actually be on the hub....is this correct? The thickness of the gasket between the sproket and the spokes is too thick to allow it to slide onto the hub. If I tighten everything down after it it's properly centered will this be enough?

    Also, anyone have any issues with the 415 chain rubbing the stock tires with this assembly? Or do I need to get more narrow treads?

    Thanks!
     
  2. biknut

    biknut Active Member

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    I've built one OP Roller.

    You don't want the sprocket touching the hub. You'll have to enlarge the sprocket hole so it doesn't touch the dust cap on the hub.

    I was able to get the stock chain to work without touching the tire.

    YouTube - ‪Bruce's OP Roller Motor Bicycle‬‏
     
  3. hotbug1776

    hotbug1776 New Member

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    my 415 rubbed, went with a 1.75 rear tire. it bugs me, but, everyone else thinks the bike is awesome. A 2" or 1.95" will clear.
    I'm on my second bike build now, it's like heroin, no, worse.
     
  4. CardInSpokes

    CardInSpokes New Member

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    Thanks guys!

    How well has your stock chain held up biknut?

    Hotbug, If I need to drop to a thinner tire will the stock rim work fine?

    Thanks!
     
  5. hotbug1776

    hotbug1776 New Member

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    I'm running 1.75 on a stock rim. and get the expensive tubes!!! mine flatted out on the second ride.
     
  6. biknut

    biknut Active Member

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    The bike belongs to my best friend. He hasn't had any problems with the chain. It took me about 3 hours to get the sprocket straight and true on the wheel.

    I think most peoples problems with chain brakeage is caused by misalignment issues. Considering how difficult it is to get it right, I can understand why it happens so much.

    If I had it to do over again, I'd buy a hub adapter and sprocket from Pirate.
     
  7. CardInSpokes

    CardInSpokes New Member

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    Thanks biknut! You wouldn't happen to know which adapter fits in the Roller hub would you?
     
  8. Geezer

    Geezer Member

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    I've got a little over 70miles on my stock chain & it seems to be fine... (probly just jinxed myself)

    the rear tire will work (at least mine did)... i just had to adjust everything to get it to clear. i tried to
    add an extra set of the metal plates that come with the rag joint as spacers to get the sprocket out further... but decided not to, 'cause you'd have to bend the coaster brake arm to get it to clear the
    bolts on the sproket.

    i hear ya biknut... i've got a lot of hours in my rear wheel & will def be using an adapter on the next one.

    not sure if it was on a Roller but someone on here had a post about cutting the cap over the hub down as apposed to making the center hole in the sprockt bigger... i had already made mine bigger but may try it on my next build (yup, i'm an addict too) lol ...i need to find that post.

    gl with your build Card... these things are a lotta fun (building and riding)




    The highyway's lime jello & i'm a BBQ'd oyster.... usflg
     
    #8 Geezer, Jun 20, 2011
    Last edited: Jun 20, 2011
  9. Greg58

    Greg58 Well-Known Member

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    I have built four o/p cruisers, olny had to open up one sprocket. As for the rag joint i found that with the one that came with the kit ofset the chain, so I made the outside joint out off 1/4 thick conveyor belt. The belt is the same woven rubber material only better! Made in the U.S.A.
    One of my friends has been riding his bike to and from work for six weeks, over five hundred miles on stock chain.
     
    #9 Greg58, Jun 20, 2011
    Last edited: Jun 20, 2011
  10. Helen Weals

    Helen Weals New Member

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    First post I Am new to this gig so sorry if this is a dumb question.What is an OP Roller?
     
  11. Mike B

    Mike B New Member

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    Cheap Wall Mart bike that looks especially good with a China motor attached.

    [​IMG]
     
  12. Greg58

    Greg58 Well-Known Member

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    Thays the bicycle we are talking about. Ocean Pacific cruiser sold at wal-mart and others.
     
  13. Helen Weals

    Helen Weals New Member

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    OK thanks. Ocean Pacific. Then I guess I have a Cranny Roller with a China Girl.If I read the Chinglish instructions correctly, one or both of the rubbers can be used.I used one with lock nuts and used a torque wrench to tighten, then backed up lock nuts with regular nuts using locktight. The sprocket runs true to the front spocket.Only had to dent fender slightly for clearance. I think my kit did not come with heavy duty chain
     
  14. biknut

    biknut Active Member

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    You have to use 2. One on each side of the spokes.
     
  15. ckangaroo70

    ckangaroo70 Active Member

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    I actually just left my dust cap off and did not enlarge the sprocket hole. I let it ride to the outside and clamped it down there because it actually provided more clearance leaving it out there. I have about 100 miles on my Roller now and I have never thrown a chain and I think I must have gotten it centered pretty well as it seems to operate pretty smooth. I just filled the hole where the dust cap was supposed to be with a large dose of white lithium grease. This does attract dirt to the outer layer of the grease, but I have it on so thick that as long as it is left undisturbed..no dirt or dust will reach the bearings. However I may flush it out after another 100 miles with acetone and then put on some fresh grease. I am not saying the way I did mine is the best way, but I can say it has worked well for me thus far, but maybe tommorow I may be cussing up a storm!LOL
     
  16. Mike B

    Mike B New Member

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    My "rubbers" were so uneven that I cut them both to make 1 of uniform thickness. I took the sprocket to a machine shop and had them cut the center hole to fit the dustcap. I used the cut rubbers inside the spokes with the 3 hole plates and I used the 5/4 holes plates to space the sprocket off the spokes.

    Works great.

    I wouldn't do this if I didn't first get a steel wheel with 12g steel spokes though.

    That's why the back wheel looks so odd. Not to mention the 26x2 tire so the chain didn't hit the tire.
     
  17. hotbug1776

    hotbug1776 New Member

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    I put both on the inside... I've got less than 1/8" before the bolt head meets the coaster arm, so, spacing on the outside of the spokes was not an option.
    On my next build, I'm not using the stock rim (going with a 20") so spacing shouldn't be an option.
     
  18. ckangaroo70

    ckangaroo70 Active Member

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    Yea...I forgot about that. My sprocket bolt heads clear the coaster brake by about only 1/8" as well. I actually used my coaster brake as a guide to make sure the clearance was the same for each bolt head. This way I was certain there was no warp in sprocket.
     
  19. biknut

    biknut Active Member

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    You're supposed to bend the brake arm out of the way.

    Your spokes won't last long if the sprocket is touching them.
     
  20. hotbug1776

    hotbug1776 New Member

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    hmmm, looks like the first bike needs a little work LOL
     

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