2012 Motobravo Roma 150cc  By  shabra (Read 1,674 times)

Wheelbender6 has a good point... But it's worth trying to clean the carb yourself.

It's quite easy to remove the carb on these, and often you can get spray-carb-cleaner into most of the places necessary to clean it out. As for a drain-screw, it's likely metric, and a substitute could be found at a home-improvement store.

One relatively rare problem I had on my Chinese 150 was the original fuel lines "decomposing" from the inside, filling the passages in the carb with crud so badly I never did get it right. I replaced the carb with a OEM style Mikuni carb off eBay for about $40. I also replaced all the fuel lines!

I also replaced the vacuum fuel petcock with a manual one for a Briggs & Stratton mower, and plugged the vacuum line. This ensured no loss of fuel-flow at open throttle, due to loss of vacuum. Just a precaution, easy to do with the lines off...

Please note: The fact your scoot SHUT OFF completely almost sounds like an electrical issue. Trust me, I learned WAY more about Chinese scoots than I ever wanted too... LOL!

Electric issues I encountered with mine included BOTH the CDI and COIL going bad simultaneously!!!  You can get decent CDI's and coils pretty cheap off eBay if needed, and they are easy "plug-n'-play" to install.

You can check for spark by pulling the plug and grounding it to the engine and cranking, to see if it sparks.

You can also spray a bit of starting fluid into the carb and see if it fires.

Now... My FAVORITE... (and yes, I've done it)... Check to see if you accidentally engaged your KILL SWITCH...  Every time I opened the seat on my Chinese 150, it pushed the kill-switch.



Also be sure you're engaging a brake lever while cranking.

And be sure your side stand is all the way up.

Most scoots have a safety interlock preventing STARTING even though cranking with at least one brake lever (usually left/rear so your right hand is free) engaged, and the side-stand retracted.

Don't forget to check that pesky KILL SWITCH either... LOL!  I've even had my sleeve push it on my Kymco 250, leaning on the bars at a red-light! ......Duh....

Hope this may help.

Ride safe,

Leo in Texas