Is there a difference between the skyhawk and the starfire

Discussion in 'Motorized Bicycle General Discussion' started by troyboy, May 5, 2009.

  1. troyboy

    troyboy Your East Coast Gasbike Connection

    Joined:
    Apr 18, 2009
    Messages:
    171
    Likes Received:
    0
    I am looking at the Grubee Starfire GT4 and the Grubee Skyhawk GT5. Both made by grubee both have the same displacement. Is there a difference??? Somebody Please!!
     
  2. floridaboy

    floridaboy New Member

    Joined:
    Apr 25, 2009
    Messages:
    133
    Likes Received:
    0
    You might trying their web site it will give you all the information you will need.

    Grubee Inc.
     
  3. Hot Dog Piggy Tails

    Hot Dog Piggy Tails New Member

    Joined:
    Sep 11, 2008
    Messages:
    78
    Likes Received:
    0
    SkyHawk is Yuan Dong Factory and Starfire is Jiali (Nantong)
     
  4. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

    Joined:
    Jan 8, 2008
    Messages:
    11,529
    Likes Received:
    1
    So yeah, pretty much the same....
     
  5. Forbisher

    Forbisher New Member

    Joined:
    Dec 28, 2008
    Messages:
    119
    Likes Received:
    1
    The Grubee Starfire 66 cc GT4 is made in the Nantong JiaLi Gas engine factory
     
    #5 Forbisher, Jul 3, 2009
    Last edited: Jul 3, 2009
  6. Forbisher

    Forbisher New Member

    Joined:
    Dec 28, 2008
    Messages:
    119
    Likes Received:
    1
    Nah , there is a huge difference
    The Skyhawk 66 cc GT5 looks the same as the PKs and does not have the squish band
    machined in the combustion chamber
    There is just a flat wide area on the edge of the combustion chamber and
    a very big dome

    The Starfire 66cc GT4 has a squish band and runs so much stronger than a PK or a GT5
    Skyhawk
     
  7. Forbisher

    Forbisher New Member

    Joined:
    Dec 28, 2008
    Messages:
    119
    Likes Received:
    1
    I don't need to post a pic of the label side of a starfire gt-4 as I have a whole stack of them here and I know exactly what the tag says.
    The pictured Grubee 50 cc GEN II is made in the same Nantong JiaLi Gas engine factory
    as the Starfire 66 cc GT4
     

    Attached Files:

    #7 Forbisher, Jul 3, 2009
    Last edited: Jul 3, 2009
  8. NunyaBidness

    NunyaBidness Active Member

    Joined:
    Jun 29, 2008
    Messages:
    1,062
    Likes Received:
    1
    His quoted text is for the Starfire, the pic is of the gt4, so basically it is two different bits of info. He was informing you of both bits not trying to say it says one thing and post a pic of something else.
    Hope that clears things up a bit.
     
  9. radrob

    radrob New Member

    Joined:
    May 2, 2009
    Messages:
    98
    Likes Received:
    0
    thanks i am going to try a starfire next
     
  10. flybytaco

    flybytaco Metal Molding Madman

    Joined:
    Oct 17, 2009
    Messages:
    1,176
    Likes Received:
    0
    I bought a starfire 2 weeks go and already replaced it with a real motor.. jet 66
     
  11. Hot Dog Piggy Tails

    Hot Dog Piggy Tails New Member

    Joined:
    Sep 11, 2008
    Messages:
    78
    Likes Received:
    0
    No actually there is a big difference first is the match as far as the transfer ports then there is the Quality of the lower end Bearing (23 Needle verses 16 needle in a poorly Engineered cast)
    The Nantong Jiali Manufacturer is known as the better if not the best engine manufacturer exporting these and have lost contracts with people Because they refuse to Mass produce cheap engines.

    If you've replaced A starfire with a Jet your Stafire was probably a 48cc'er thats about the only ones left. Also the Starfire is the factory that your Jet was Manued at..And if it is is out of one of the First two shipments of Jet Engine they have lower end problems due to the fact a Customer I wont say no names but is actually thier competitor convinced them to use a Poorly casted Lower end Needle casing. They all need replaced. As a matter of fact the ones that are correct and Have 23 needles are still on thier way too them. I never received the 16K Needle bearing with the problem because I have the prints too it and refused to Allow them every order to put them on the bottom of my Connecting rod.

    I deal with this factory and its Management Exporter and are very good friends talking at least once a week.
     
    #11 Hot Dog Piggy Tails, Oct 18, 2009
    Last edited: Oct 18, 2009
  12. flybytaco

    flybytaco Metal Molding Madman

    Joined:
    Oct 17, 2009
    Messages:
    1,176
    Likes Received:
    0
    It says it was manufactured on 7 2009. is that one of the bad ones? and yes it was a48 verry slow I baught the limited edition black one It def is a runner.wee.
     
  13. Hot Dog Piggy Tails

    Hot Dog Piggy Tails New Member

    Joined:
    Sep 11, 2008
    Messages:
    78
    Likes Received:
    0
    Actually no you got the 23 needles your good to go. I am online with my Plant manager as we speak and the latest shipment which was July were the needles instead of the GR..I mean bad casted needle bearing case!

    As far as your 48 cc Starfire goes Milling the Square part almost all the way (I went all the way) off the head is a compression boost it needs. Also using silicone on your intake to carb slide junction is the best performance tips I can give you.

    I have that engine you have there but with the 8mm studs I finally got them to change to the bigger head studs, And Better paint for the exhaust, A little more ballanced crank, Lower Intake casting, and Higher exhaust port casting. You got a real performer though. Got to go Sir. Peace.
     
    #13 Hot Dog Piggy Tails, Oct 19, 2009
    Last edited: Oct 19, 2009
  14. flybytaco

    flybytaco Metal Molding Madman

    Joined:
    Oct 17, 2009
    Messages:
    1,176
    Likes Received:
    0
    the gen 2 steel sleeve starfire?? with 8 mm studs? or the jet? confused lol thanks
     
  15. Riding Rich

    Riding Rich New Member

    Joined:
    Aug 14, 2009
    Messages:
    349
    Likes Received:
    0
    I just got a PK80-J this past tuesday.
    I took it apart and it has the needles in the bottom end with no cage.

    I take it there are 23 rollers in there.
    Aswem the PK80-J rocks.

    I'll have to post my teardown pics.
     
  16. Kevron99

    Kevron99 New Member

    Joined:
    Aug 11, 2009
    Messages:
    261
    Likes Received:
    0
    Here is my second engine...starfire 50cc gen II-A...all chrome with black head.
     

    Attached Files:

  17. Riding Rich

    Riding Rich New Member

    Joined:
    Aug 14, 2009
    Messages:
    349
    Likes Received:
    0
    That was the motor i was supposed to get from GASBIKE.
    They sent me a GT-2B all black and then only gave me $10.00 stor credit.
    What a CROCK.

    Wish i woulda got that engine instead of the mistake they made.
     
  18. Riding Rich

    Riding Rich New Member

    Joined:
    Aug 14, 2009
    Messages:
    349
    Likes Received:
    0
    My PK80-J came from Pirate Cycles.
    Got good service there.
     
  19. Kevron99

    Kevron99 New Member

    Joined:
    Aug 11, 2009
    Messages:
    261
    Likes Received:
    0
    You should have bought it from Bicycle-Engines.com. Here is the site 50cc StarFire Gen II Phantom Edition Engine - $149.99.

    I noticed with the GEN II-a has better head studs instead to the acorn. Also the clutch arm is much longer for better pulling. The intake manifold looks better quality. It comes with the new style Carbs (the one with fuel shut off lever)

    I also have a 66/80 cc Skyhawk GT-5 and I think Starfire is way much better engine.

    See the pics of Starfire head and manifold/clutch lever.
     

    Attached Files:

  20. turtle tedd

    turtle tedd Member

    Joined:
    Jul 18, 2009
    Messages:
    153
    Likes Received:
    0
    210061741....Thanks for the info...Have a Grubee Starfire GT2 ...installed on my MB now with approx 500miles on it..was about to order another ( motor only ) as eventual replacement.....instead I ordered from Pirate Cycles..the 66/80cc J Kit
     

Share This Page