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

[cbscinta1]

Greetings,

I just got my 150cc Milano DX scooter on the road. I purchased it from www.gsmotorworks.com. The problem is, I can't get it to go over 40 MPH. In only weigh 150 lbs, and there are no speed restrictors on this bike. I'm concerned that I got a raw deal, but I'm also usedto riding a 2-stroke scooter and this is a 4-stroke.

Any idea why I can't get it over 40 mph? Any suggesstions on what I can do to fix this problem without having to modify the bike? I was under the impression that 150cc scooters were fast out of the gate, and would have no problem reaching speeds of 60 mph.

Any help would be appreciated. Thanks!

[ejcycles]

Your scooter may have a speed/rpm limiter inside the CDI Box, or you may not have it set up and tuned correctly.

That's something that may not be simple unless someone looks at it.

[Dusty]

Originally Posted by cbscinta1

Greetings,

I just got my 150cc Milano DX scooter on the road. I purchased it from www.gsmotorworks.com. The problem is, I can't get it to go over 40 MPH. In only weigh 150 lbs, and there are no speed restrictors on this bike. I'm concerned that I got a raw deal, but I'm also usedto riding a 2-stroke scooter and this is a 4-stroke.

Any idea why I can't get it over 40 mph? Any suggesstions on what I can do to fix this problem without having to modify the bike? I was under the impression that 150cc scooters were fast out of the gate, and would have no problem reaching speeds of 60 mph.

Any help would be appreciated. Thanks!

I had a new 150 cc scooter that did exactly the same ... I cleaned the carb, but it remained the same. It had me groping for a solution. I was going down to American Lifan in Dallas, Tx to pick up a load of LF200's so I loaded it onboard.

The Chinese fellow "Jimmy", who was sent over from China undersood my sign language and pointing at the speedometer. He pulled the carb, threw it into a big box, put on a new carb and the scooter ran over 65 mph.

They said they do not have any restrictors on any scooters, and that the coating inside the tanks usualy dissolves with a full tank of gas. However, it is possible for it to clog the high speed jet or passages. Occasionally a carb is defective and needs to be replaced. "Jimmy" didn't hesitate, he just pointed at the carb and made a motion like he was throwing it away...which he did! He has years of experience working in their factory in China.

[katoranger]

Considering how cheap the carbs are for these scoots a replacement is worth a try.

Allen

[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...

[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...