First Impressions Received Motor Kit Today

Discussion in '2-Stroke Engines' started by 45u, Feb 23, 2016.

  1. 45u

    45u Active Member

    Sorry to say I see the Chinese quality has not gotten any better! No wonder many have problems as there are MANY of the parts that have burrs on them that can break off and really mess up a motor. The intake to cylinder is so bad fit I would think you could add a big improvement in performance to buy or make another intake. Same with exhaust they do not match well either.

    I am going to take the whole motor apart before I ever try to start it as it feels like there is either a bad crank bearing of has trash in it as well as I am going top deburr everything.

    Plating on the inside of the cylinder looks really bad and might sometime see what it cost to have one nickel sealed and sized. Looking like I will spend a few hours just fixing what the factory could not. I am all so going to check the bore with my dial bore gauges and crank turn as I have built many cranks.

    The engine kit was very poorly packed and many items are scratched up and I am talking to the seller right now. I want to run this engine stock to see what I can get out of it then I planned on either getting another engine or upgrade this one to see just how fast I can get it to go with my old fat butt on it.
    More to come.
    Thanks
    Jeff
     
    KenM likes this.

  2. KenM

    KenM Member

    What kit did you get? So us non machinists can stay away from it. Thank you sir!
    Keep looking up! Ken.
     
  3. 45u

    45u Active Member

  4. 45u

    45u Active Member

    Guess I am just too use to quality and I only do quality work. I have been talking to the seller but they think the painted parts are OK all scratched up. I paid for new I want new. Live and learn.
    Later
    Jeff
     
  5. KenM

    KenM Member

    Yeah that figures! Stay away from eBay kits. I think they are all bad! Ken.
     
  6. 45u

    45u Active Member

    No problem I can fix it but it will not only cost me time but parts. The seller is talking about some sort of parcel refund. Will keep all posted.
    Later
    Jeff
     
  7. bakaneko

    bakaneko Active Member

    Well, it shouldn't be scratched, but cmon give the China quality bashing a break. The kit is $110, it will motorized your bicycle and many folks are more than pleased with them...
     
  8. 45u

    45u Active Member

    I am going to have to take the crank out and true it I am not bashing I am telling it like it is as you have to really force the crank over even with the PTO gear off and the map out. I have built many an engine and none of my cranks turned this hard. I do not care if it was 50 cents I buy new I should not get items that are all beat up. I sure as heck do not treat my customers this way. Maybe that is why many of my customers I have had for 20 to 30 years and they keep coming back as they know I do quality work. I assure you this engine this engine the way it is would not make a few miles if that.
    Later
    Jeff
     
  9. bakaneko

    bakaneko Active Member

    Yeah, it should not be scratched or beat up. Mine came in perfect condition. I don't know; it feels like you have a good case to get a replacement from the seller. The seller is most likely an importer and not the manufacturer (China). Mine came in excellent condition so it is most likely not the manufacturer screwing up the packaging but rather handling once it is in the seller's hands. Yeh, the cranks are known to be not the best on these 2-stroke kits. I guess it is just a product of being able to motorized your bike at such a low price... If you can fix it then kudos to you.
     
  10. 45u

    45u Active Member

    I have build many a crank most on big Harley s but done many a single cylinder crank as well. Friction is a big HP eater and as well as cause premature wear. Here is the type of work I do. The arrow is pointing too a machined place for a o-ring seal. When I got it the place where the o-ring goes was 90% gone.

    [​IMG]
     
  11. 45u

    45u Active Member

    I am sending the motor kit back and I am pleased to say the seller is paying return shipping. When I get my refund I plain on buying a motor kit from one of the advertisers here on the forum more then likely Gas bike.
    Thanks
    Jeff
     
  12. bakaneko

    bakaneko Active Member

    are you going to get one of the racing/performance kits or the standard? I am curious on how well their performance kits perform. o_O
     
  13. KenM

    KenM Member

    Check the reviews on Gas Bike. Not very good.
     
  14. 45u

    45u Active Member

    Standard kit to see how it runs and being I have been a motorcycle mechanic and machinist for 45 years I am going to upgrade it myself. All so this way I end up with spare parts as if everything goes well I will be building another one.
    Thanks
    Jeff
     
    KenM likes this.
  15. 45u

    45u Active Member

    I did not order from Gasbike.net as I had way too much problems with a order I placed over a week ago and still waiting.
     
  16. sbest

    sbest Active Member

    I bought the Grubee GT5A from www.motorizedbicycle.ca
    Very pleased. Unpainted, natural finish.
    Cylinder finish was good but porting had burrs and transfer ports had ridges.
    Quality was fair and engine ran well as delivered.
    Very little work had it doing 36mph on a 26" bike with 44t. That is about 8000rpm with little vibration.

    Steve
     
  17. 45u

    45u Active Member

    Yesterday I received an engine from a eBay seller and this engine is much better then the one I got before off eBay and sent back. The quality is MUCH BETTER! I took it all apart as it had too much grit and trash in it and going to clean it well and reassemble. Hope to have it read when my bicycle gets here.
    Thanks
    Jeff
     
  18. mrbg

    mrbg Member

    Check out DAX.com
     
  19. 45u

    45u Active Member

    Link does not work.
     
  20. Timbone

    Timbone Active Member

    Thatsdax.com
     
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