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Riding on the straight and narrow road...
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Joined: Mar 24, 2013 16:27:23 GMT -5
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Post by ngman28 on May 23, 2013 11:01:37 GMT -5
Hey everybody,
I am a proud new scooter owner, and recently purchased a 2008 Linhai Aeolus 300 with 2400 miles. I have had an absolute blast on it commuting to school and riding with my dad (riding a Burgmann 650). It has great pickup and power, and the storage is incredible.
In the past couple weeks, I have gained enough confidence to venture out onto the freeway, but have run into a problem. While on the freeway (or even on a 55 mph. highway), the scooter will start to shudder and lurch; the engine will simply start idling with WOT, and will occasionally rev up to speed causing the lurching. My dad, who is literally a rocket scientist, thinks that the fuel pump is not keeping the carburetor bowl filled, thereby starving the engine of fuel and causing it to cut out at high loads (ie, 60 mph on an uphill).
I have been trying to figure out if the '08 Aeolus 300 model has a vacuum or electric fuel pump, and have received conflicting info from various sources. Also, I have yet to figure out how to access the thing once I know what to fix.
Anybody out there have a similar problem, or know where/what type of fuel pump the scooter has?
Thanks a bunch!
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Post by spandi on May 23, 2013 11:18:45 GMT -5
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Post by richardthescooter1 on May 23, 2013 11:24:08 GMT -5
Hi ngman28, First have you check to make sure all vacuum lines are tight, and both intake clamps are tight? if they are good, then you could be running on the lean side, next time it starts to act up back off the throotle a 1/4 turn and see what happens, if it surges forward (lean0 if if recovers and settles down (yiour too rich) the air/fuel ratio screw to your carb needs adjusted, if lean 1/4 turn counter clockwise, if too rich clockwise 1/d turn and turn that.
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New Rider
Currently Offline
Riding on the straight and narrow road...
Posts: 8
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Joined: Mar 24, 2013 16:27:23 GMT -5
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Post by ngman28 on Jul 16, 2013 16:55:30 GMT -5
Well, after putting it all off, I bought a Mikuni high-flow vacuum pump and installed it yesterday...rode about 35 miles today and noticed that the throttle was much more responsive, even when I rode 2-up with my sister. Hopefully it keeps going strong!
Minor question: the Mikuni pump has two fuel outlets; since I only needed one, I plugged the other by melting one end of a 2" piece of fuel line and using a hose clamp to secure it to the outlet. It seems to be holding up okay, but is there a better way to plug that hole?
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New Rider
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Post by barnie on Jul 16, 2013 19:53:29 GMT -5
Ngman, your dad was exactly correct on the running out of fuel etc. The faster the engine runs the lower the vacumn drops and at wide open throttle or high speeds and pulling on a hill the vacumn drops enough that a some vac powered fuel pumps just don't move enough fuel till u slow up a bit and end result is carb bowl wont stay full. I have a Linhai 257 engine and I put an electric pump on to solve my problems. As far as plugging the 2nd outlet if you are comfortable with the way you have it done, then leave it alone. You just don't want gas blowing under it with a hot engine etc behind where it is plugged. You also could cut the threads off a 1/4 bolt and insert in a short pc of hose and clamp both ends also. Barnie
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Post by richardthescooter1 on Jul 17, 2013 10:01:17 GMT -5
Hey Barnie, mine scoot isd running great now no problems in those high speeds (I'm loving it)
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Post by richardthescooter1 on Jul 17, 2013 10:04:21 GMT -5
Here is the fuel pump I put on Attachments:
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New Rider
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Joined: Apr 4, 2013 19:42:12 GMT -5
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Post by barnie on Jul 17, 2013 19:54:48 GMT -5
Richard, glad to hear its running great. Clutch settle down? Just change the belt in the future and looks like ur good to go. Don't you love the cheap little repairs that make big difference. I love the ones that don't cost me anything! Barnie
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Post by richardthescooter1 on Jul 18, 2013 7:53:53 GMT -5
DX
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