Question about Motorcycles
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
Check the vacuum line that connects to the petcock valve. It's possible that there is not enough vacuum to open the valve and provide fuel flow. The petcock valve is a rubber diaphragm that opens a valve in the presence of suction. You can test the valve by sucking on the tube and seeing if fuel flows from the other tube. If not you may have a bad valve. If the valve works then you may have a clogged float valve. Sometime debris clogs the float valve and the only fuel you have to run on is what's in the bowl. Once the bowl is empty the engine dies and the bowl is refilling too slowly to sustain the engine.
Posted on Sep 11, 2009
SOURCE: Hyosun Scooter Carb Adjustments
Very good thought process on the adjustments. The throttle screw sets the idle speed and the air screw sets the fuel mix at idle speed. The stock setting is 1.5 turns outward. IMPORTANT > do not tighten these two adjusters down. Only screw these in until they LIGHTLY seat. Now turn each adjuster one and one half turns outward.
From this point you adjust the idle speed then adjust the air screw for fastest idle speed at that throttle screw setting. If the idle speed becomes faster than desired after adjustment, just reset the throttle screw and then reset the air screw.
A “very helpful” rating for this answer? Thanks!
Posted on Jun 27, 2009
The blue header on your posting says a Milano 150cc which is a single cylinder four stroke. You write the bike is 49cc. That small an engine it is probably a two stroke (mix gas with oil)???? Which bike do you have???
Four stroke or two stroke chances are that the carb float has a bit of trash not letting the float needle close fully. Remove the carb and clean it. re-mount it then Remove the water trap bowl from the bottom of the petcock (gas valve). Is there any trash in the bowl?
Dump the bowl and remount. It may be that your bike does not have the water trap bowl I have mentioned.
Use the comments tab to ask other questions.
Posted on Mar 22, 2009
Tips for a great answer:
Oct 17, 2017 | Motorcycles
Oct 23, 2016 | Sym Motorcycles
Nov 01, 2015 | Yamaha Motorcycles
Apr 17, 2015 | Motorcycles
Apr 08, 2014 | Golden Technologies Companion II Travel...
Jun 30, 2013 | Benelli Motorcycles
Aug 17, 2012 | 2009 Diamo Velocity 50
Feb 02, 2012 | Cpi Motorcycles
Jan 25, 2011 | 2000 Bajaj Chetak 150
Apr 29, 2010 | RTO 50cc Moped Scooter
89 people viewed this question
Usually answered in minutes!