New engine can’t even get to 10mph

[Whitewill1412]

but why would it run fine on my old motor with the carb at the same level ive got it now

Didn't you say the old one blew up?

 

[newuser3466]

Didn't you say the old one blew up?

I’m not sure if it blew up or seized or both. I was riding it and I heard a whizzing sound suddenly so I stopped it and after that it wouldn’t turn over because the crank was stuck and when I opened it there was metal shavings on top of piston which damaged the head and the piston and there was a chunk out of the cylinder wall

 

[Whitewill1412]

Sounds to me like it could have been running very lean. Let's see what the other guys say.

 

[NicoMec]

Anyone got any idea on what could be wrong

When I was building my friend's bike he also was going around 10mph and that was because the throttle cable housing wasn't seating correctly so he wasn't able to give it full throttle so maybe check the cable I guess

 

[SirWilliam]

Could be a exuast pipe. Just so happened that I match ported the flange a little to much cutting just close enough to let it hang on until I modified it with a thermal jug, a aluminum no trespassing sign, a AZ licence plate, some strips of rubber inner tube tire, hose clamps, screws, 2pt epoxy puddy. Ultimately birthing it into your broke, I wanna tuned pipe now.

Soo... Much more power.. you need the expansion chamber and tuned to your motor. My flow bench meter worked great for me yeap.

Anyways while going to get tubes for my next build, I needed to put one of the original exhausts pipes back on. Night an day, went super snail away.

Soo try your pipes. Drill out the center tube inside it. Let"r breath. Or just order the pro pipe and know it's a belt you can be change to the next brand new rebuilt motor you get.

Safe to say it's a $50.⁰⁰investmentand that usually doesn't fail.. and or your ports could be casted halfway closed. Mine was just waiting to crumble off before slapping around and letting alumi cast take it all out.

Did check the eco screw located around the other side of the crank cqse. ? Could also be that it or you just need to let the solar fins around the cylinder jug continue to charge up the spark for just a bit longer. No one ever talks about that very much.

Chain could be binding, tires could be low or lil more on the flat side, could have to much oil an need to burn it hot, try giving it that. She likes that after I fill her up from the pump and just dump in a old 99grape shot bottle full of 2stroke oil into her tank. Shaking it up sometimes doesn't work and it all drops down into the carb. She bogs out. So I choke her to the point of her pop pa pop bopbopbaba vroom when she's been getting thick and couple times being cold outside with these storms I've even just left it in the ¼/almost mid range choke.

Sooit's motors 1st rule of law...fuel/air, compresson spark

 

[DAMIEN1307]

Could be a exuast pipe. Just so happened that I match ported the flange a little to much cutting just close enough to let it hang on until I modified it with a thermal jug, a aluminum no trespassing sign, a AZ licence plate, some strips of rubber inner tube tire, hose clamps, screws, 2pt epoxy puddy. Ultimately birthing it into your broke, I wanna tuned pipe now.

Soo... Much more power.. you need the expansion chamber and tuned to your motor. My flow bench meter worked great for me yeap.

Anyways while going to get tubes for my next build, I needed to put one of the original exhausts pipes back on. Night an day, went super snail away.

Soo try your pipes. Drill out the center tube inside it. Let"r breath. Or just order the pro pipe and know it's a belt you can be change to the next brand new rebuilt motor you get.

Safe to say it's a $50.⁰⁰investmentand that usually doesn't fail.. and or your ports could be casted halfway closed. Mine was just waiting to crumble off before slapping around and letting alumi cast take it all out.

Did check the eco screw located around the other side of the crank cqse. ? Could also be that it or you just need to let the solar fins around the cylinder jug continue to charge up the spark for just a bit longer. No one ever talks about that very much.

Chain could be binding, tires could be low or lil more on the flat side, could have to much oil an need to burn it hot, try giving it that. She likes that after I fill her up from the pump and just dump in a old 99grape shot bottle full of 2stroke oil into her tank. Shaking it up sometimes doesn't work and it all drops down into the carb. She bogs out. So I choke her to the point of her pop pa pop bopbopbaba vroom when she's been getting thick and couple times being cold outside with these storms I've even just left it in the ¼/almost mid range choke.

Sooit's motors 1st rule of law...fuel/air, compresson spark

Would you care to edit this post so that it is legible, readable, and understandable please so I don't have to delete the posting????

legible​

adjective​

1. Possible to read or decipher.
2. Plainly discernible; apparent.

 

[GW's Motorized]

Sounds like a vacuum leak to me. And as far as no smoke, some oils are "smokeless" I have no idea if they are or not because I haven't tried them, but I would check your bottle.