40cc or 80cc?

Discussion in 'Spare Parts, Tools & Product Developement' started by sammygrey, Jul 1, 2008.

  1. sammygrey

    sammygrey New Member

    hey gang!
    i'm totally new to the motorized bike scene, and i just ordered my first one. i have a choice between a 40cc or 80cc, and, naturally, because it sounds more powerful, i'm opting for the 80cc. like i said, i'm new to dealing with these lil' engines (actually any engine!:)), and i want to go for what's best for my bike and me.
    have a great day!
    sammy grey

  2. stude13

    stude13 Active Member

    hi sam;welcome. the 80 is a seventy. read a ton before you bolt it. the nuts and bolts are made of pot metal. replace all first. then you have to reassemble it, use loctite red and blue. dont tighten anything like youu would a honda or briggs. there is plenty of info on this. read a bunch in posts and use search, you will be ok. mitch
  3. sammygrey

    sammygrey New Member

    thanks, mitch!

    i'm not doing the work myself, even though i'd love to learn. i just ordered a bike from spooky tooth, and it said that we had a choice between a 40cc and 80cc, so i guess i'll opt for the 80 (70?) are there any engine manuals you suggest i get as i begin learning more about the "nuts and bolts"? i may, on down the road, try to convert my other bicycle on my own, but that's a ways off, even though i'd like to find something to take my mind off work and other things. hmmm? :rolleyes:
    take care,
  4. Jon Kimball

    Jon Kimball Member

    Hey sammy, I have the 49cc engine and my uncle has an 80, and to me (an untrained eye) I can't spot a large difference in size nor performance. My 49 goes 35 on flats and the 80 does about the same. Only slight difference is hill climbing. I decided to go with the 49 to obey local laws seeing as I already broke one by not having a license.
    Good luck with your new bike
  5. bluegoatwoods

    bluegoatwoods Well-Known Member

    I found that the 50cc has all the power that I need. In fact, it has more power than I want; I don't need to take a bicycle at the speeds that this thing will give. I'm worried that the bike can't take it.

    For that reason I wouldn't buy an 80cc at all. I'd recommend a scooter for anyone who wants to travel at those speeds.
  6. sammygrey

    sammygrey New Member

    Thanks, Jon and Bluegoatwoods

    I've opted for the 80, even though I can't imagine that I'll ever go faster than 20 or 25 mph, but I'd rather have the extra power just in case I encounter a big hill or anything else that requires a little extra "oomph!" not to insinuate that the 40's and 50's wouldn't have plenty. :cool:
    I should be getting my bike within the next two weeks. Can't wait!
    Yahoo! :p
    Take care,
  7. HI,

    Go Big, gear up and have FUN!

  8. sammygrey

    sammygrey New Member

    can't wait!

    thanks, andrew!
    i'm super excited -- need to start shoppin' for a helmet. . . my bike is due to arrive this week or next = can't wait! :p
  9. KilroyCD

    KilroyCD Active Member

    You'll find that the "80" (which is actually 67cc - I wish these vendors that continue to call them 80s would start representing them properly) will not offer appreciably greater speed, but better torque. If you're in a hilly area, you most likely made the better choice.
  10. sammygrey

    sammygrey New Member

    hi! well, i finally got my barebones from spooky tooth, and i'm in the process of putting her together. she's together, but i'm unsure about how to adjust the hand brake properly. there wasn't any manual, and i wasn't able to find one at the spooky tooth site. also, now that it's together, the back tire is locked up. i'm not sure what's going on. it looks like the motor chain has something to do with it. without a manual, i feel like i've been "riding" blind. if you know where the manual is at that site, can you let me know? also, how do you mix gas and oil properly? i'm sorry about these elementary questions, but i'm new to this; however, i'm very eager to learn!
    thanks for reading!
  11. s_beaudry

    s_beaudry Member

    yeah yeah yeah, same thing I said and thought UNTIL your hand is on that throttle and you goose it up to 30 or 35!

    Stay safe and enjoy....
  12. sammygrey

    sammygrey New Member

    once i get her goin', i'll let you know!

    I just received my bike, after almost 8 weeks, on Friday, and now my back tire isn't moving -- think the chain connected to the engine has something to do with it; I'm waiting to ask some folks at Spooky Tooth Cycles. I'm also trying to figure out the cable to my hand brake. I've connected it, but I don't have a manual or anything, and all this is pretty new, so I'm doing my best. Once I take her for a spin, I'll let you know my top speed, which will probably be 10! Isn't that crazy! :rolleyes:
    Take care,
  13. echotraveler

    echotraveler Member

    my thinking, before doing anything.

    i want power, just for hikes, i want low power for rides. sound like a classy guitar amp, 15 watt el84's a red cabinet and a nice 12" silverbell.



    loliknowits a guitar amp...but i still love how it feelsto know you will be...

    ill be reading about safetyim still hesitant to practice in a park...
    Last edited: Aug 26, 2008
  14. bluegoatwoods

    bluegoatwoods Well-Known Member

    Hi Sammy,

    concerning your build. Is your clutch hooked up and working properly? And if so, will your wheel turn when you have the clutch handle pulled in? If not, then I'd look to your brake or your wheel bearing. The tire and wheel aren't jammed up against the frame, are they?

    Brake adjusting is not a big deal. I'll be willing to try to explain if necessary, but it'll be awkward trying to do it by typing. But maybe that's not necessary; is it just that you are unfamiliar with these bike parts? That's the impression I get. If that's the case, then I'll bet you'll be able to figure it out by looking at the parts and thinking a bit.

    Good luck. Sometimes I go a few weeks without checking into this forum. But I'll try to remember to look into this thread at the next opportunity and see how you're doing.
  15. tolly

    tolly New Member

    find kings motor bikes web page they have a page on putting the kit together its just the same as the "manual" sounds like the cluch may not be tight enough