Chains Aligning bicycle chain with motor chain...

Discussion in 'Transmission / Drivetrain' started by John-Forrest, Sep 17, 2008.

  1. John-Forrest

    John-Forrest Member

    I seem to have problems with aligning my bicycle chain and motor chain on this WildFire bike I got. If I get one tight enough, the other one is too tight. Usually the bicycle chain is very tight with NO slack and the engine chain keeps getting loose. Since the engine chain is more important I tend to tighten that & leave bicycle chain alone. The wheel seems to be twisted to the side which I assme is not a good thing. I wonder if my problem is the bicycle chain and engine chain are not quite the same length, maybe I should remove a link from engine chain? I also tend to have this aggravating problem of the engine chain dragging onto the wheel and fender. I am curious if others have these difficulties with aligning the two chains and how they fix this kind of thing.

  2. bluegoatwoods

    bluegoatwoods Well-Known Member

    You must be talking about a coaster brake type wheel?

    I got around the chain tension issue by using the chain tensioner on the "pedal chain" side. you just mount it upside down. You can tighten the engine chain and then use the tensioner to take up the slack in the pedal chain.

    And you can make a little wiggle room (for chain/tire clearance) by "sliding" your axle right or left. You know what I mean; loosening the bearing on one side and tightening it on the other.

    Also, your drive sprocket isn't mounted backwards is it?
  3. jmccrury

    jmccrury Member

    You may have to remove a link from the engine chain, or you could buy another bicycle chain to make yours longer.
  4. i had the same problem at first kinda and i finally just went to the hardware store (Lowes actually since it was the only one open) and was able to pick up the chain links they sell them by fours for less thank 5 bucks ... then you just remove the links needed and put on the connector link BUT be sure if you do that ... to put the little pin clamp thing on so that the open end of it is going the opposite way the chain otherwise it coupld hit something and pop it right off :X yea that happened.
  5. John-Forrest

    John-Forrest Member

    Bicycle chain vs. Engine chain...

    I suspect I will need to remove a link from engine chain. I sometimes wonder if the wheel thing that takes slack is really necessary; it seems to create a lot of resistance when I'm just pedaling with clutch in.

    I just went on a long trip and there were a lot of lot steep hills. Somewhere along the way, the pedal and pedal arm starting acting like it was coming loose. I went to a bike shop; the guy told me the bike part seems fine but there may be loose bearings in the engine sprocket. Anyway, now the engine is making the bicycle sprocket fly around. I have to hold my feet on the pedals to keep it from flying around at the same speed the engine is turning. Every rotation there is some kind of weird knock.

    Does anybody have any idea what THAT means? It definitely feels like the engine is going kaput! Or maybe clutch isn't quite disengaging bicycle sprocket? They definitely feel like they are fighting one another.
  6. Alaskavan

    Alaskavan Guest

    Sounds to me like a problem with your rear hub.
  7. darth garfunkel

    darth garfunkel New Member

    I had the same problem. If the bike chain was tight the motor chain was loose, but only like 1 link too loose. I ended up getting a longer bike chain and keeping the motor chain tight. Bad idea, the bike chain was too loose and kept popping off which meant no coaster brakes. So I set the back wheel to keep the bike chain tight and raised the motor in the frame to keep the motor chain tight.
  8. highoctane

    highoctane New Member

    wildfire mb

    if you have the wildfire mb (factor assembled)
    the motor chain only gets a 3/8 slack.
    i had the problem @ first w/the chains
    like you. i took off that crazy "work/start"kickstand
    this allowed me to keep more uniform on the chains.
    the wildfire mb has a z-brake in the rear.not a coaster. the drive chain also has a tention pulley.
    this i hafta ajust afer each days ride.
  9. John-Forrest

    John-Forrest Member

    Hello Fellow WildFire Owner!

    I find what works best for me is to leave a bit of slack on the engine chain - and have the bicycle chain absolutely tight (no slack) - otherwise bike chain tends to slip off when I shift from bike to engine. I think engine chain is too long and I'm considering taking a couple of links off w/o tensioner wheel altogether.

    The accessories that company put on s..k! I wound up replacing kickstand with more solid one, replacing that dinky mirror with a huge bicycle mirror (Pyramid), removing that cheap electric system and using LED lights, putting metal pedals with teeth in place of plastic ones. In short, I had to rebuild the bike for about as much as I paid to buy it.

    Make your comments to WildFire, though. They do consider them and they may make a better bike in future. Assembled motorbikes are in the formative stage now.
  10. highoctane

    highoctane New Member


    hey john forrest, where did you find pedals to fit ?
    what size are the threads ? what i had around where
    too small. i don't like those plastic pedals ! its hard
    to keep on them ,xspecialy when wet. i guess i'll take a link/two from my chain aswell.....the master
    link fell out this morning.had to pedal 6 miles........
    good thing the bike is light weight. i picked-up my
    chain.but,that master link is far gone. anyone know the chain size ?
    i'll hafta go to ACE & get a master. johnm could you
    post some pics. of the upgrades ?
  11. John-Forrest

    John-Forrest Member

    You can get lots of things at your local bicycle shop - I got my metal treaded pedals for $20 that way, they're much better than those cheap plastic ones. I get chain and master link from . Call WildFire parts or tech support and give them ****! I did succeed in getting Al at tech support to send me a new chain. I think that engine chain is too long and I'm looking into shortening it by a couple of links, maybe taking out tensioner with plastic wheel altogether because I think it causes a lot of resistance.

    Did your chain slip as soon as you got it? That's what happened to me. Also replace tires with kevlar tires from bikeshop, the ones there puncture easily.

  12. highoctane

    highoctane New Member

    the chain-tensioner slips everyday . plastic pedals i hate,slip-off them xspecialy when wet . are the kevlar tires flame tread ? i called w.f. & they sent me to parts. the cat said a chain was $19.95 . couldn't get
    far w/them. any how, its time to get this puppy whipped into shape. post some pictures of your bike.
    i think my christmas list this year will be upgrades
    for the fire. hey john, hows ashley doing these days ?
    Last edited: Oct 28, 2008