Best motorized bike upgrades for 80cc

Discussion in 'Motorized Bicycle General Discussion' started by 31ccchopper, Dec 11, 2009.

  1. 31ccchopper

    31ccchopper New Member

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    what do you think is the best upgrade for the motorized bike below $70.00??? i preffer the slant head..trk
     
  2. Tcams

    Tcams New Member

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    Check out Bicycle engine tips. It will have the answers your looking for!
     
  3. Motor Boys

    Motor Boys New Member

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    I like the expansion Chamber. I was shocked at the difference overall.
     
  4. Pablo

    Pablo Master Bike Builder & Forum Sponsor

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    Expansion chamber, and home done manifold matching.
     
  5. Andyinchville1

    Andyinchville1 Manufacturer/Dealer

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    HI,

    The BEST bang for the buck speed wise (which I am assuming is your ultimate goal) is a
    smaller rear sprocket.....That will net the most speed per dollar spent....A 34T sprocket for $24.95 plus shipping is THE best bang for the buck and will still leave $$ in your pocket!

    Engine wise lots of small things can be done to the engine itself (example port matching the intake to the cyl jug, milling the head for increased compression etc...) and best part of all...some mods are FREE or at least very low cost if you have tools on hand

    Have fun tinkering....Ride safely!

    Andrew
     
  6. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    If you want to go real fast for 70 dollars, I'll come over and put the bike in the back of my Ranger and go 60 mph and you can give me the 70 bucks.
     
  7. BarelyAWake

    BarelyAWake New Member

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  8. 31ccchopper

    31ccchopper New Member

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    Ha i have the exact dremel stylus

    .duh.
     
  9. BarelyAWake

    BarelyAWake New Member

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    ...and it's about the best motorized bike upgrade for an 80cc you can get for the money ;)

    I loves me mine Dremel lol
     
  10. rkorson4209

    rkorson4209 New Member

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    I have to agree, I didn't think I needed it, and now I USE IT ALL THE TIME
     
  11. AnthonyX99

    AnthonyX99 New Member

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    Ram Air forced induction!!!!! except winter could cause problems.
     
    #11 AnthonyX99, Dec 13, 2009
    Last edited: Dec 13, 2009
  12. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    That could cause problems at any temp....unless you have a variable jet or other means of changing the mixture.
    It can cause an overly lean condition (provided you can make an efficient one).
     
  13. AnthonyX99

    AnthonyX99 New Member

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    That's true, well wouldn't depend on the size of the pipe and length you could put a cone filter to restrict the airflow a little. When I tried this I used the plastic intake that came with the kit and made a hole about 1 inch, and used a vacuum hose and fence pipe that would go in front of the handle bars I left the 4 holes on the plastic untouched and the filter was left on as well. Boy did it get noisey and a noticeable power boost from a stand still I took it off because it look really stupid and lame.
     
  14. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    I am not going to touch that.
     
  15. Venice Motor Bikes

    Venice Motor Bikes Custom Builder / Dealer/Los Angeles

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    Or, you could just jet the carb right... ;)
     
  16. Venice Motor Bikes

    Venice Motor Bikes Custom Builder / Dealer/Los Angeles

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    Or how about "does anyone know how to mix different fuels together so I won't have to go through all the trouble of re-jetting???" wtf?
     
  17. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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