Best 2 stroke Motor for $200

Discussion in '2 Stroke Bicycle Engines & Kits' started by shiveralex, Apr 11, 2017.

  1. shiveralex

    shiveralex New Member

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    So i have the Chinese 49cc and its killing me. every day i feel like the motor hates reving less and less. it started to like to run around 2900 rpm and now it dosent go past 2400 without vibrating everywhere.

    Like the title says, i wanna buy a new motor. I dont care about cc specifically, i just want something reliable, ported, and faster. Is it possible for the price and what do you guys recommend.
     
  2. crassius

    crassius Well-Known Member

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    sorry, vibration is rarely the motor's fault - check your mounts and check your frame for cracks - a new motor can't fix those
     
    Dan likes this.
  3. shiveralex

    shiveralex New Member

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    I heard the rapid vibration was caused by an unbalanced crank, is that incorrect? if so, what type of material do you suggest i wedge between my mounts.
     
  4. shiveralex

    shiveralex New Member

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    Disregarding the vibration comment, id still prefer something more powerful, and much more reliable and quality.
     
  5. crassius

    crassius Well-Known Member

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    older unbalanced cranks don't start to vibrate until speeds get over about 25mph

    I recommend cutting some pieces of PVC pipe to put between frame & motor. Remember, if a strong man can grab motor and frame and move it at all sideways, motor is loose.
     
  6. Tony01

    Tony01 Member

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    The bottom line is all of those 2-strokes are complete pieces of crap. The evidence of that claim is the existence of this website with thousands of topics regarding problems with 2-strokes. Get a 79cc predator and a motor mount instead. I ride a 212 with the better part of 10k miles on it and I don't carry tools unless I go for a ride longer than 15mi.
     
  7. TheNecromancer13

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    What he said. Almost all the 2 strokes are junk. If you decide to go the 79cc predator route, read this: http://www.instructables.com/id/79cc-Motorized-Bicycle-From-Scratch/
     
  8. Tyler6357

    Tyler6357 Member

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  9. crassius

    crassius Well-Known Member

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    only saw $250 - $320 kits there with shipping - did I miss it?
     
  10. Tyler6357

    Tyler6357 Member

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    Yes, his China Girls are listed in the parts section.....click on the link in my post....about 2/3 of the way down the page you will see the F-80s. It's $149 with shipping included.
     
    #10 Tyler6357, Apr 13, 2017
    Last edited: Apr 13, 2017
  11. crassius

    crassius Well-Known Member

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    all I see there are blocks (and may just be bottom ends)
     
  12. Tyler6357

    Tyler6357 Member

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    I don't know what to tell you.
    Click here--->http://thatsdax.com/ENGINE_KIT_PARTS_PAGE_1.html
    and search the entire page to find his china girl engines (4th row from the bottom). You get the bottom and top ends. He does sell top and bottom ends separately here--> http://thatsdax.com/ENGINE_KIT_PARTS_PAGE_3.html

    If you really want to wake it up I would recommend installing these parts: a high compression head, a 15mm intake, and an expansion pipe

    High compression head---> http://www.ebay.com/itm/282290691028?_trksid=p2055119.m1438.l2649&ssPageName=STRK:MEBIDX:IT

    15mm Intake----> http://www.ebay.com/itm/272359336901?_trksid=p2055119.m1438.l2649&ssPageName=STRK:MEBIDX:IT

    Expansion pipe---> http://www.ebay.com/itm/282283527905?_trksid=p2055119.m1438.l2649&ssPageName=STRK:MEBIDX:IT
     
    #12 Tyler6357, Apr 13, 2017
    Last edited: Apr 13, 2017
  13. crassius

    crassius Well-Known Member

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    I tend to leave things standard, while taking any inet claims with a grain of salt.
     

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