Announcement

Collapse

General Forum Rules

This forum is open to all brands and aftermarket products.


No flaming or insulting other members, everyone is entitled to their own opinion.


Treat others how you want to be treated. If you do not have anything nice or productive to say, then don't say anything at all. Remember, you are interacting with real people and if you wouldn't say it to their face, then you probably shouldn't type it. Don't be a keyboard warrior!


No profanity. Dropping f-bombs doesn't make you cool.


Absolutely no obscene or pornographic content is allowed

Please post in the appropriate sections

Do not email, PM, call, or carrier pigeon etc. ADA Racing or admin with complaints about bans or Billetboard drama. If you were banned, it was for a reason and we're too busy to deal with those kind of complaints. If you have an issue with a moderator, please PM said moderator or any of the other moderators and if they have time to address it they will. Remember, we offer this board as a service to the community and it is a privilege to be on here, not a right.

Any member violating the above rules will be banned

These rules may be updated at any time
See more
See less

ported uberscoot stock chinese engine

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • ported uberscoot stock chinese engine

    Hi this is my first post, I recently bought a uberscoot 2x scratch and dent off ebay for a good price. Seems to be really well built but the engine is really week. Top speed is 20mph in second gear and thats without any hills. I did a bunch of reading on here about porting and then I came across this video https://www.youtube.com/watch?v=TZGFHZZKTu8 Near the end of the video you can see the stock uberscoot chinese engine taken apart and the restriction plates installed near the base gasket for epa approval. I Have never ported an engine before so I left the transfer ports alone and just grinded out the restriction plates for better flow. The stock exhaust can had some kind of restriction plates so I removed those as best I could with some pliars. when I put it all back together I didn't notice alot of difference except when going downhill it seems like It really starts to wind up. I hope its just the stock carb holding it back. I bought a cheap chinese 15mm carb to experiment with. Has anyone here tried to modify their stock evo chinese engines?

  • #2
    Weres the pics?, all about having a good time rebuilding/upgrading/modifying products but sounds like u got some trash and u could/ mind as well buy goped brand frame and start from there it will make it way more Ez for parts and way better quality period anything else belongs at the dumps.

    Comment


    • #3
      Heres what it looks like basically stock. I never took any pictures when I had the engine apart and ported the restriction plates. I modified the stock exhaust can and it made quite a bit more power but wasn't much quieter than running with no muffler at all. Hunting for a pipe, it looks like bigtoys is out of stock of the uber performance pipe.
      I wouldn't exactly say its trash, just that the motor doesn't make a whole lot of power as it sits.

      Comment


      • #4
        A pipe and some advanced timing should wake it up some. Port work would do wonders if you could get it done at a low cost. Otherwise I'd just change the engine to something more powerful stock like a GP460
        2 Sports and a GSR40

        Comment


        • #5
          Originally posted by uberscoot1 View Post
          Heres what it looks like basically stock. I never took any pictures when I had the engine apart and ported the restriction plates. I modified the stock exhaust can and it made quite a bit more power but wasn't much quieter than running with no muffler at all. Hunting for a pipe, it looks like bigtoys is out of stock of the uber performance pipe.
          I wouldn't exactly say its trash, just that the motor doesn't make a whole lot of power as it sits.
          O ya right on my bad sounded like u had somethin else I'm always ranting late nite drunk talking about goped. Nice job man tires look dope

          Comment


          • #6
            I took the cylinder back off and it looks like there is still some work that can be done to the transfer ports to the crankcase. I am still learning about port work. The areas marked in black with a sharpie are roughly the areas to grind down, before it was a solid plate with just small holes drilled if that makes sense. There appears to be a metal gasket can I just scrap off the old paper gasket and run it like that? I read that will change the squish clearance and give more compression. Also what is the best way to remove carbon deposits?

            Comment


            • #7
              I would continue to run a paper gasket. You can cut your own, most any auto parts store sells it. I recommend touching up the transfers where they split. Just make it near knife edge sharp to help the flow. The carbon deposit looks very minimal, but if you want you can use a little sand paper for the top of the piston, brake cleaner or gasoline works well to loosen it up. U can also carefully use a flathead screwdriver to scrape off the carbon inside the cylinder, but be careful not to scratch the cylinder wall plating. Look like it’s coming along well

              Comment


              • #8
                Originally posted by dukem2 View Post
                I would continue to run a paper gasket. You can cut your own, most any auto parts store sells it. I recommend touching up the transfers where they split. Just make it near knife edge sharp to help the flow. The carbon deposit looks very minimal, but if you want you can use a little sand paper for the top of the piston, brake cleaner or gasoline works well to loosen it up. U can also carefully use a flathead screwdriver to scrape off the carbon inside the cylinder, but be careful not to scratch the cylinder wall plating. Look like it’s coming along well
                Thanks duke! I got rid of most of the carbon inside cylinder by soaking it with a little wd40 and most of the carbon broke loose on its own. Heres the finished port job, hopefully this will give me some more powwwa!!

                Just a little tip I didn't want to break the engine all the way apart so to keep metal shavings out of the crankcase I stuffed crankcase with a paper towel a liberally coated it with grease, the metal powder will stick to the grease.
                Last edited by uberscoot1; 02-18-2020, 05:44 PM.

                Comment


                • #9
                  Good luck and hopefully you get some good results as porting takes experience and experimentation.
                  2 Sports and a GSR40

                  Comment

                  Working...
                  X