150cc scooter won't go over 40 mph...Help!

[dirtbkr188]

Originally Posted by ZombieScooter666

Try starting with manifold. They rip easily or need to be sealed. Oil drain tight? You never know... check for seals....super annoying when that's the problem b cuz the vacuum has to be tight or won't run alright....

Especially 4 a new bike...

you might want to type a little louder, the Original Poster of this thread hasn't been on here since he posted it 15 years ago...