kings motors gt 80

Discussion in 'High Performance Bicycle Engine Tips and Motorized' started by mike carter 2, May 17, 2016.

  1. mike carter 2

    mike carter 2 Member

    Joined:
    Nov 23, 2011
    Messages:
    250
    Likes Received:
    11
    anyone bought one if so what do yoy think of it
     
  2. Mikey_

    Mikey_ Member

    Joined:
    May 15, 2016
    Messages:
    37
    Likes Received:
    0
    I'm looking at this kit too. There seems to be a few discussions in the archives about this motor. One earlier adopter find metal shavings and poor workmanship, other owners seem to like it and have not had any issues. Some users suggest taking it apart and inspecting the engine as a good measure for any purchase.

    I wonder if it is possible to get more than 4.5 HP out of it or if it can even get the 4.5 HP that they claim it to have.

    Anyway, I hope that you can find the information that you need.
     
  3. mike carter 2

    mike carter 2 Member

    Joined:
    Nov 23, 2011
    Messages:
    250
    Likes Received:
    11
    i already intalled kit on bike exaust is crap made new one better but not what it needs has reed valves but no mods to piston seams to pull pretty hard with 36 tooth rear cog ordering sbp chamber and new piston to mod mabey larger carb also
     
  4. Mikey_

    Mikey_ Member

    Joined:
    May 15, 2016
    Messages:
    37
    Likes Received:
    0
    Do you think that it might be better to just buy a PK80 and source all the parts myself for this engine vs paying someone else for their 'fast' version of this engine?
     
  5. mike carter 2

    mike carter 2 Member

    Joined:
    Nov 23, 2011
    Messages:
    250
    Likes Received:
    11
    i wish i had read the revue that you talked about before today now i have to do a tear down to let anyone know if any good runs about 25 30 after 3 tanks fuel run through it climes hills with some assistance on peddles when it get steep i think it will be better after i change jets in carb new chamber modded piston mabey larger carb i dont know yet if can recomend it yet this my second build first was a stock grubee with shaved slant head jetted carb home made exaust went about 35 on flat ground
     
  6. mike carter 2

    mike carter 2 Member

    Joined:
    Nov 23, 2011
    Messages:
    250
    Likes Received:
    11
    i realy dont think its built to it full potential
     
  7. mike carter 2

    mike carter 2 Member

    Joined:
    Nov 23, 2011
    Messages:
    250
    Likes Received:
    11
    im going to shave the head this weekend so i can let you know if it has any problems in the top end soon
     
  8. Mikey_

    Mikey_ Member

    Joined:
    May 15, 2016
    Messages:
    37
    Likes Received:
    0
    I'm going to go ahead with this motor and order everything on Monday. If it turns out to be anemic, I will just learn all that I can from the guys here and tune it myself.
     
  9. mike carter 2

    mike carter 2 Member

    Joined:
    Nov 23, 2011
    Messages:
    250
    Likes Received:
    11
    i didnt say it was weak pulls my 200 lb ass around pretty good realy needs good exaust and more than likely carb jetted it wants to deisel bad i dont know if its the exaust i made for it or carb jetting i ride it to work daily and have a blast
     
  10. mike carter 2

    mike carter 2 Member

    Joined:
    Nov 23, 2011
    Messages:
    250
    Likes Received:
    11
    pulls pretty hard on bottom end wants to deisel at full throttle i think it might do forty or so if and when i get it to stop deiseling
     
  11. mike carter 2

    mike carter 2 Member

    Joined:
    Nov 23, 2011
    Messages:
    250
    Likes Received:
    11
    i still want a look inside
     
  12. mike carter 2

    mike carter 2 Member

    Joined:
    Nov 23, 2011
    Messages:
    250
    Likes Received:
    11
    any one have ant suggestions please
     
  13. mike carter 2

    mike carter 2 Member

    Joined:
    Nov 23, 2011
    Messages:
    250
    Likes Received:
    11
    i meant any suggestions
     
  14. Sam90lx

    Sam90lx New Member

    Joined:
    Sep 29, 2015
    Messages:
    62
    Likes Received:
    0
    I am about to buy one of these, just hope they are not junk. Guess I can spend extra and get it cleaned up and dialed in if needed but hope I don't need to.
     
  15. Sam90lx

    Sam90lx New Member

    Joined:
    Sep 29, 2015
    Messages:
    62
    Likes Received:
    0
    Order placed and fingers crossed. lol
     
  16. mike carter 2

    mike carter 2 Member

    Joined:
    Nov 23, 2011
    Messages:
    250
    Likes Received:
    11
    i realy think its not a bad engine the exaust it came with is very restrictive about a 1/2 inch opening at the manifold the rest of kit looks good im pulling the head tommorow ill post on how it looks inside aftrer i shave some off
     
  17. Sam90lx

    Sam90lx New Member

    Joined:
    Sep 29, 2015
    Messages:
    62
    Likes Received:
    0
    Cool, in for the pictures!

    I also ordered the SBP expansion chamber exhaust and have a 40 tooth Sprocket / hub adapter for it.
     
  18. Mikey_

    Mikey_ Member

    Joined:
    May 15, 2016
    Messages:
    37
    Likes Received:
    0
    I don't know if I should get the GT80 or go for a 79cc predator the price is almost the same and mounting doesn't seem too hard.

    I really want a 2 banger.
     
  19. Sam90lx

    Sam90lx New Member

    Joined:
    Sep 29, 2015
    Messages:
    62
    Likes Received:
    0
    I have 2 other "mild" 2 strokes. Love them!
     
  20. mike carter 2

    mike carter 2 Member

    Joined:
    Nov 23, 2011
    Messages:
    250
    Likes Received:
    11
    mikey wait till i pull the top end in am i want to look at the port job and cylender to see quality of work
     

Share This Page