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Post by alasdair529 on Aug 24, 2011 13:59:06 GMT -5
Help! I had issues with my bike, I had a broken air hose and a valve screw was stripped. I replaced both of them. Valves are set perfect, all hoses were checked and ones with cracks were replaced. My scooter starts up fine and idles fine, but my scooter won't move. I took crank case off, belt moves fine, when i turn back pully the wheel moves like it should. I don't have a center stand so I can't check everything without riding. When i squeeze my accelerator my bike will jump for a few seconds then won't go after that then i let go and try again and bike will jump. I have been working on this for a few days now. Give me a solution or a checklist as to what to check.
1. Replaced hoses
2. Replaced and reset valve screw that was stripped
3. changed oil
4. checked condition of belt
5. fuel filter is fine
6. tire pressure is fine
7. idles fine
8. starts fine
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Post by alasdair529 on Aug 24, 2011 14:00:14 GMT -5
Oh this is a 150cc 4 stroke scooter chinese, and everyday is cruicial i have missed 3 days of college classes because of this issue trying to fix it
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Post by sprocket on Aug 24, 2011 14:03:33 GMT -5
Sounds like the rear clutch, if the belt is moving in the pulleys OK
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Post by alasdair529 on Aug 24, 2011 14:08:51 GMT -5
is there any way of checking rear clutch, i don't have a lot of money to play with as I'm into this bike alot, what would cause rear clutch to go out?
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Post by sprocket on Aug 24, 2011 14:17:09 GMT -5
Not really.. the clutch either works or it doesn't work.. it is based on the centrifugal force of the rear pulley... they have 3 springs and they will often rust through or brake...
Is the belt moving up and down in the rear pulley when you rev the engine?
You said that you can turn the back pulley and the rear wheel moves? This shouldn't happen when you do it by hand.. it needs a certain RPM for the clutch to activate and move the rear wheel about 1500 RPMs...
I think you need to get it to a mechanic
How are you getting it to start without a center stand? It is dangerous doing that...
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Post by alasdair529 on Aug 24, 2011 14:20:42 GMT -5
First off i start the bike by sitting on it with side kickstand up, hold my brake and electric start. I know the dangers in that. Why would my clutch all of a sudden go out when bike was running perfect the other day. I guess I'm screwed cuz i don't have an impact wrench or the money to send to mechanic
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Post by sprocket on Aug 24, 2011 14:38:35 GMT -5
Does the engine still rev up? or is it stalling when you give it gas? I'm trying to tell if it is clutch problem, variator problem or engine related...
Put something under the frame to get the rear wheel off the ground.. like a milk crate etc and see if the rear wheel will spin when you rev the engine a bit...
Clutches go all the time.. variator weights get sideways and engines stop working..because the carb plugs up... could be any of these things...
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Post by alasdair529 on Aug 24, 2011 17:51:13 GMT -5
ok i will try putting something under it soon, i know the bike will rev up then it will bogg down, then if i let go of accelerator after that it will shut off. i will try to find something to put under my bike soon to lift it up
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Post by sprocket on Aug 24, 2011 18:12:27 GMT -5
OK .. so the engine is bogging and dies???... then the clutch and the rest is OK?  ? Adjust the valve gaps to .004 INCH intake and .005 INCH exhaust and we will talk... |
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Post by alasdair529 on Aug 24, 2011 19:13:21 GMT -5
ok im gonna put it on milk crate now that i got from gas station and report back valve adjustments have to wait till morning as it is dark now
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Post by alasdair529 on Aug 24, 2011 19:18:42 GMT -5
ok I just put my bike up on a milk crate, The back wheel spins fine, but as usual when i hold down accelerator it will eventually bogg down then shut off if i let go, i will readjust the valves in the morning when the sun comes out at 8am, I have done this a million times and they should be fine. Thanks for the help
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Post by sprocket on Aug 24, 2011 19:25:35 GMT -5
OK so your problem is BOGGIN'...adjust the valves then adjust the carb...
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Post by alasdair529 on Aug 24, 2011 20:32:00 GMT -5
Ok I think just in case I'm gonna take my carb off and clean it, just in case there is a dirty jet then I will properly adjust valves again, I appreciate all the fast responses, I will report back in the morning after I clean the carb and readjust the valves
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Post by car6car on Aug 24, 2011 21:36:23 GMT -5
What is "bogging"?
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Post by alasdair529 on Aug 25, 2011 7:28:52 GMT -5
"Bogging" is the bike trying to accelerate or move and its like the motor is dying down. To better clarify its like a car running out of gas and its chugging that last ounce of gas, then dies.
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Post by alasdair529 on Aug 25, 2011 9:33:48 GMT -5
Ok I readjusted the valves and cleaned my carb out. No improvement. I am testing my bike out with every half turn on the idle/fuel screw. My bike won't get past 4000rpm, it will get there then slowly bogg down. Also some exhaust smoke is coming out. Could all this be because of adjustments?or could a small air leak possibly cause any of this. I don't see a small airleak coming from the Valve box(where you adjust valves) the gasket isn't perfect due to me keep taking it on and off? please give me input, I'm missing too much school messing with this bike, it was working perfect before the hose replacement
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Post by alasdair529 on Aug 25, 2011 9:41:54 GMT -5
I meant to say that there is a very small air leak, this couldnt cause all these issues could it? i have gasket sealer stuff, but don't want to use it yet due to having to keep taking valve cover off to check adjustments
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Post by DanK on Aug 25, 2011 9:50:13 GMT -5
Help! I had issues with my bike, I had a broken air hose and a valve screw was stripped. I replaced both of them. Valves are set perfect, all hoses were checked and ones with cracks were replaced. My scooter starts up fine and idles fine, but my scooter won't move. I took crank case off, belt moves fine, when i turn back pully the wheel moves like it should. I don't have a center stand so I can't check everything without riding. When i squeeze my accelerator my bike will jump for a few seconds then won't go after that then i let go and try again and bike will jump. I have been working on this for a few days now. Give me a solution or a checklist as to what to check. 1. Replaced hoses 2. Replaced and reset valve screw that was stripped 3. changed oil 4. checked condition of belt 5. fuel filter is fine 6. tire pressure is fine 7. idles fine 8. starts fine Please give us a clearer explanation of what is wrong. Telling us you checked the air in the tires and changed the oil doesn't help diagnose the problem. You said the scooter doesn't move - is the engine running ok? Does it rev up ok? Does it stop altogether when you try to move forward? Does the rear wheel move OK when you have it up on a stand or support with no load on it? Does it do that when the engine is running too? It sounds like you might be having issues with your fuel mixture. Do you have the stock air cleaner assembly on it still? Is your air filter clean? What hose did you replace? |
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Post by alasdair529 on Aug 25, 2011 10:09:12 GMT -5
Ok Thanks for the questions dank,
To start off, The hose i replaced was the air filter hose coming from carb to air filter, Bike starts and idles, It revs up ok not great now. Like i said holding the brake in, it only hits 4krpm, Now when i sit on bike I can move the bike at 5mph and no more, I can only open the throttle about a 1/4 turn anymore and the bike will bogg down, When i lifted up bike rear wheel spins, wheel moves fine, The air filter system is fine and hasn't changed since I bought the bike last year
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Post by alasdair529 on Aug 25, 2011 10:13:44 GMT -5
Please give us a clearer explanation of what is wrong. Telling us you checked the air in the tires and changed the oil doesn't help diagnose the problem.
You said the scooter doesn't move - is the engine running ok? Does it rev up ok? Does it stop altogether when you try to move forward? Does the rear wheel move OK when you have it up on a stand or support with no load on it? Does it do that when the engine is running too?
It sounds like you might be having issues with your fuel mixture. Do you have the stock air cleaner assembly on it still? Is your air filter clean?
What hose did you replace?[/quote]
This has to be some sort of adjustment issue, Bike was running fine a few days ago, valves are perfectly adjusted, I'm thinking it has to do with maybe the air/fuel, but I have tried adjusting several different turns and no solution, all hoses are great condition, gas is getting to the carb, Jets are fine, It seems that the bike isn't getting enough gas or air, could a small air leak cause this much trouble?
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Post by h3nry on Aug 25, 2011 10:28:56 GMT -5
when up on a support and started does the wheel start moving right off or do you have to give it gas for it to move?
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Post by alasdair529 on Aug 25, 2011 11:08:25 GMT -5
h3nry i have it adjusted to where the wheel moves a little bit, like its supposed to. I am concerned about this black and white smoke that is coming from exhaust. I can't believe im running into this problem with my bike, I am trying to keep my patience, I don't have money to take bike to shop or know anyone with a truck so it would take a tow truck to get it there. I know it has to be some kind of adjustment issue, carb idle/fuel screw is adjusted at 3.5 turns. valves are at .004, so something somewhere is wrong, I will check valves again and seal cover with gasket sealer so that the air leak will be fixed.
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Post by Pony66 on Aug 25, 2011 11:30:04 GMT -5
Have you checked your fuel petcock to make your getting enough fuel?
You may have a pinhole or tear in one of the two diaphrams in the carb. This will not allow enough fuel to flow when you turn the accelerator, so it gets very lean and dies.
Your A/F mix sounds a little rich, should be closer to 2.5 turns. Also check the needle under the big diaphram on top. See if the tiny clip is in the middle or where.
If all else fails, just order a new carb off eBay for $28 shipped. Get the one that reads "Pei Wei technology from Japan" on the black diaphram cover.
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Post by alasdair529 on Aug 25, 2011 12:00:39 GMT -5
Ok if you read my previous post saying that i fixed my bike, i didn't but it is now obvious that it is some kind of adjustment issue as i had the bike full revving but turned it off to fix an oil leak then it didnt work. I will try again tomorrow, no class until monday so i have 3 days to fix this issue
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