New Rider
Currently Offline
Posts: 13
Likes: 0
Joined: Aug 16, 2013 7:33:44 GMT -5
|
Post by hurricanehannon on Aug 16, 2013 7:51:13 GMT -5
Hi,
First post as a newbie looking for some advice. I have recently bought a 50cc Italject Velocifero. It has been running ok, but seems to bog down at full throttle. When you ease off to half throttle, it picks up again. To remedy the issue, I did the following:
•Removed the Carb and cleaned all jets
•Replaced the float and needle
•Replaced the vacumn fuel tap and fuel lines
•Drained the petrol tank and oil tanks and replaced contents.
For 1 trip the scooter seemed better, but still bogged down as before. Yesterday, I rode it to work and it seemed to run very smooth but after calling into a petrol station to fill up, it took 4 kicks to start it and then it died on me about 1 mile up the rode. I had rode it about 10 miles before filling up. The scooter would then not start, no matter what I tried.
I pushed it to work and left it overnight. Today I tried it and it started on the first kick. I haven't taken it out on the road as I am unsure whether the fault will re-occur.
Please can you advise what I would need to look at? Is this a fuel, air or ignition problem?
Thanks in advance.
HH.
|
|
|
|
Post by yelloscoot on Aug 16, 2013 8:13:56 GMT -5
I'm sure someone more experienced with 50's will chime in later. Only thing I may suggest from my experience is maybe loosen the gas cap to allow air to flow into the fuel tank. A similar symptom happened with my 150 when I first got it. I had over filled with fuel and backed up my emission canister....or something along that line...  I removed that system and problem solved. That was almost two years ago, don't quite remember the specifics. |
|
New Rider
Currently Offline
Posts: 13
Likes: 0
Joined: Aug 16, 2013 7:33:44 GMT -5
|
Post by hurricanehannon on Aug 16, 2013 8:22:22 GMT -5
Thanks, that's a great shout. We'll try it and let you know.
|
|
|
|
Post by sailracer on Aug 16, 2013 9:04:02 GMT -5
[replyingto=yelloscoot]yelloscoot[/replyingto]I had exactly that same problem after i de=restricted my jonway-yy50qt30 raptor. I finally drilled a 1/8" hole in the gas cap
(remove cap and inside rubber). It has never happened again.I guess the fuel tank was sufficiently vented for 30 MPH, but not more ;D
|
|
Freshman Rider
Currently Offline
Posts: 86
Likes: 0
Joined: Mar 28, 2013 21:05:37 GMT -5
|
Post by andrewrides1 on Aug 16, 2013 23:33:07 GMT -5
ya it can be the fuel tank some times but with my experience with the fuel tank is it will actually die on you when theres no air. to me it sounds like your rich or lean. in my experience when it bogs down at high speed or has trouble accelerating at high speed when you let off the throttle it is rich. try adjusting the carb or rejeting it. those canisters are usualy problems on 4stroke scooters not 2 strokes. my scooter runs fine with the canister connected to the tank.
|
|
New Rider
Currently Offline
Posts: 13
Likes: 0
Joined: Aug 16, 2013 7:33:44 GMT -5
|
Post by hurricanehannon on Aug 21, 2013 3:19:43 GMT -5
[replyingto=andrewrides1]andrewrides1[/replyingto]Ok, a quick update.
I managed to get the scooter home last night. It started first kick, seemd to run ok, but wasn't as smooth as before. Wouldn't go over 50km/H, which I'm assuming is down to it being restricted. It felt as though it wanted to push on, but held back. Opening the throttle beyond halfway made no difference, it just started to bog.
Anyhow, after parking up at home, I noticed fuel dripping onto the floor at an alarming rate. I was not sure where it was coming from, but when I took off the fuel pipe at the carb end, it was flowing freely. I was under the impression this would only happen if there was a vacumn created when the bike is running. Therefore, could my fuel tap (petcock) be knackered?
I'm surprised as I replaced the fuel tap only a few weeks ago. Could it be that I have installed a faulty one, or what could have caused it to fail so soon.
|
|
|
|
Post by domindart on Aug 21, 2013 4:04:26 GMT -5
Can't help ya but welcome to the site  |
|
|
|
Post by devo344a on Aug 21, 2013 10:04:37 GMT -5
I put a manual fuel shutoff on mine and took care of a problem before it started
|
|
New Rider
Currently Offline
Posts: 13
Likes: 0
Joined: Aug 16, 2013 7:33:44 GMT -5
|
Post by hurricanehannon on Aug 22, 2013 7:57:25 GMT -5
[replyingto=devo344a]devo344a[/replyingto]That might be my fall back option. I am still trying to deduce the problem. Personally, I think the vacumn fuel valve is broken. I can't see any other reason for fue to flow through the fuel line when the sccoter is switched off. Can I just check, the vacumn hose connects at the bottom of the petcock and the fuel like at the side, Correct? I have ordered a new petcock and fuel hose. Hopefully that will solve it. Attachments:
|
|
New Rider
Currently Offline
Posts: 13
Likes: 0
Joined: Aug 16, 2013 7:33:44 GMT -5
|
Post by hurricanehannon on Aug 26, 2013 14:55:56 GMT -5
Quick update. I replaced the petcock, and the fuel and vacumn hose in case there was a hidden split. Put it all back together, it started up after a few kicks and was running well. I had changed the spark plug as well. Only took it out a couple of times over the weekend, no more than 5 miles. Was planning on using it tomorrow morning, so I just took it out for a spin, and it died on me again, after 200 yards. It now won't start. Any ideas?
Choke, electrical, float? any help/suggestions appreciated.
|
|
|
|
Post by jeepsteve92xj on Aug 26, 2013 15:08:22 GMT -5
Have you adjusted the valves? Should be done on a cold engine.
|
|
Sophomore Rider
Currently Offline
Posts: 117
Likes: 0
Joined: Mar 13, 2013 19:46:35 GMT -5
|
Post by pgs on Aug 26, 2013 20:02:47 GMT -5
i am assuming it is a 2 stroke, i would check your reeds to make sure they are not cracked or chipped, that could stop it from starting
|
|
New Rider
Currently Offline
Posts: 13
Likes: 0
Joined: Aug 16, 2013 7:33:44 GMT -5
|
Post by hurricanehannon on Aug 27, 2013 3:29:11 GMT -5
Thanks. Would the valve clearance and/or condition of the reeds explain why the scooter starts ok, and then dies after a short period of time, then I am unable to start it until it is left for quite a while. I am slowly working my way through the possibilities. Would it help if I took the carb off again for another clean.
|
|
Sophomore Rider
Currently Offline
Posts: 117
Likes: 0
Joined: Mar 13, 2013 19:46:35 GMT -5
|
Post by pgs on Aug 27, 2013 16:08:55 GMT -5
if it is a 4 stroke than the valves could be a problem if they are not adjusted right you could have the problem you are explaining, if it is a 2 stroke there are no valves you would have reeds they are located under the intake, i had a cracked reed and my scooter would start sometimes usually stall and not want to start, but if i left it for awhile i could get it to start again then it would do the same thing again, also if you do have reeds and there is a crack they could break and get sucked into the crankshaft
|
|
New Rider
Currently Offline
Posts: 13
Likes: 0
Joined: Aug 16, 2013 7:33:44 GMT -5
|
Post by hurricanehannon on Aug 28, 2013 10:12:46 GMT -5
PROBLEM SORTED!!!! I cheked the plug for a spark first, and all was ok. I then removed the fuel pipe and kick started the scooter to see if fuel was present in the fuel pipe. Nothing appeared. I removed the vacumn lined and manually sucked and fuel started to flow through the fuel pipe. Deduced the vacumn pipe probably wasn't sealed tight enough. Changed it for a smaller inner diameter tube that fitted snugly at the carb and petcock. Hey presto, it now starts first kick. Took it for a quick spin, all seems ok. Will take it out for a longer outing tomorrow. Thanks for the suggestions, they were a great help.
|
|
jet
