|
|
Post by acescooter on Oct 8, 2014 22:55:46 GMT -5
Firstly hello all. My name is Neels and i live in Tennessee usa. I recently gpt given a 2008 Keeway venus 50cc scooter. Its been sitting for some time now untill i got my hands on it lol. It was missing a throttle cable thus it didnt run. So i went ahead and bought a new cable and carb in the process. The cable i got seems to have been the wrong one if im not mistaken. Its a single end cable that goes to the same on the other side(a single end) like most regular cables. My first qiestion is, iv done quite a bit of research and found i need a single end cable that goes into two cables at the end that attaches to the carb. Is this true? If so where does the second cable go to? As the carb i have has only one place for a cable to attach to and thats in the slide inside the carb itself.
Second question, are these scooters able to idle from start up? I have to warm mine up very well to get it to idle.
Third question is, after adjusting my a/f screw a bit and the idle screw too iv got it to where it will run pretty good but i seem to have a slight hesitation at about mid rpm range. Nothing huge but i feel it could pull thru smoothly all the way. Any suggestions welcome! Most importantly is the correct cable il need as the one i have on now i had to modify to make work. Im the kind that if i want something running now il modify what i need to do so, but id like the correct cable to be able to rule that out if thats where any of my problems are. There are many other questions i have but lets start with those for now. Thanks all.
|
|
|
|
Post by niz76 on Oct 8, 2014 23:11:00 GMT -5
 A quick google search shows that your scoot is a 2T. (They're the best!  ) The throttle cable goes into a "Y" splitter that splits off into two cables. One cable goes where you mentioned- the slide on top of the carb. The 2nd cable goes down underneath the engine to the oil pump. When you twist the throttle, one cable moves carb slide and you accellerate, the 2nd moves the oil pump and it puts oil into the fuel via the carb automatically so you don't have to pre-mix like most other 2 strokes. Make sense? Most top tuners nix the oil pump in favor of premixing. If the oil pump fails-poof there goes your piston and/or cylinder. Pre-mix is foolproof. This is a simplistic explanation but u get the picture Scoot should idle at startup. Most stock carbs have an auto-choke. There should be 2 wires coming out of your carb that go to a plug. If it isn't plugged in, or not working it could cause the idle problem you describe. Lean or Rich mid-throttle is adjusted via the needle in the carb. It works with your main jet to regulate fuel. Tons of info here in the Tech section and ton of 90GTVerts vids to help! Hope this helps! There are many here with way more experience and knowledge than me. You're in the right place! |
|
|
|
Post by acescooter on Oct 8, 2014 23:43:44 GMT -5
A quick google search shows that your scoot is a 2T. (They're the best! ) The throttle cable goes into a "Y" splitter that splits off into two cables. One cable goes where you mentioned- the slide on top of the carb. The 2nd cable goes down underneath the engine to the oil pump. When you twist the throttle, one cable moves carb slide and you accellerate, the 2nd moves the oil pump and it puts oil into the fuel via the carb automatically so you don't have to pre-mix like most other 2 strokes. Make sense? Most top tuners nix the oil pump in favor of premixing. If the oil pump fails-poof there goes your piston and/or cylinder. Pre-mix is foolproof. This is a simplistic explanation but u get the picture Scoot should idle at startup. Most stock carbs have an auto-choke. There should be 2 wires coming out of your carb that go to a plug. If it isn't plugged in, or not working it could cause the idle problem you describe. Lean or Rich mid-throttle is adjusted via the needle in the carb. It works with your main jet to regulate fuel. Tons of info here in the Tech section and ton of 90GTVerts vids to help! Hope this helps! There are many here with way more experience and knowledge than me. You're in the right place! Thanks for the quick response. Ok firstly i guess i should stop riding it then as i modified a single cable to go directly to the carb and do not have a cable going to the pump. Dont want to cease it lol. Im most likely going to ditch the oil pump and oil bottle and just run a premix. Im surprised i havent ceased it yet. Put about 25 miles on it with my modified cable lol. The carb i bought on ebay has the auto choke device on it but its obviously not working as it refuses to idle on start up. I must hold throttle slightly open to get her to idle then after shes good and warm then she'll idle. Im thinking i need to go back to the stock carb and see if that helps any along with getting a stock throttle cable. When you say the mid range bog is adjusted via the needle do you mean i need to move the clip on the needle up or down? And see if that helps? Il be sure to check out the tech section and so on. I appreciate your help man |
|
|
|
Post by niz76 on Oct 9, 2014 0:06:29 GMT -5
Hard to give advice on the needle setting as i don't know if you're lean or rich, but erring on the rich side is always safer as too rich won't hurt your engine, but too lean will. I'd guess by your description that you need to crack the throttle a bit that you're lean. Moving the clip down will raise the needle to let more fuel by. Move the clip down a notch and try it. Tuning is a trial and error method and it may take you a few tries to get it right... your carb might be ok....everyone's setup is different...
Good luck! Happy scooterin!
EDIT: I have mis-spoken here: Needle adjustment shouldn't affect your idle as that's handled by the idle jet and a/f mixture screw. The idle jet in your new carb may be too small and/or clogged. Try this: screw the a/f screw all the way in during idle (rich). Did it stall out? If not, your idle jet may be too small....
|
|
|
|
Post by 2TDave on Oct 9, 2014 4:51:31 GMT -5
Welcome! Now why can't someone give me a Venus!
|
|
|
|
Post by Sitticuss on Oct 9, 2014 10:24:17 GMT -5
They do make an oil pump that doesn't use a cable. I've seen it on a few scoots. What you guys can't tell when the oil pump goes out? Your scooter sounds like a rocket and performs like a 150cc...lol
|
|
|
|
Post by acescooter on Oct 9, 2014 20:42:38 GMT -5
Ok guys iv just dug into it pretty good. All rear fenders are off and I finally saw where the oil pump is. Question, to delete the oil pump do I just take off the hose and just leave the pump there? im guessing that would be what to do otherwise I think there would be an opening to the motor. By the looks of things that cable has been off a while with all the gunk built up around it. question 2, I want to take off the ol emissions deal, do I just plug the pipe coming off the exhaust with something or is there a better way?
Funnily enough when I went to start it it started right up and idled. Shut it off and it wouldn't start up and idle again, had to feather the throttle a crack to get her going then if I let off she dies out. any way I got er warmed up and set the idle and air fuel scrw till it sounded good and pulled all thru throttle with as little hesitation anywhere thru the rpm range. and let er settle back down to an idle again. had to rest idle screw a few times after letting it settle back to idle after gassing it to wot.
Should I be getting any sort of electrical reading coming from the 'auto choke' wires? Cause I unplugged the connector and stuck a multimeter in it and got no reading when I turned on the key and pulled in brake and cranked her over. how else can I test this or where could I look to see what the problem might be. Please don't tell me I need to search the harness.
im gonna order the correct cable for it and run its original stock carb that im gonna go clean up good. my concern is the auto choke and id like to get it fixed if possible. If I cant find the problem is there a possible mod I can make like a button I could hold down and activate the auto choke for the time needed to get her warm enough to idle?
Thanks in advance all
|
|
|
|
Post by acescooter on Oct 9, 2014 20:46:19 GMT -5
Another thing is could the pump allow small amounts of oil by it without being activated? cause like I said iv run it quite a bit and I haven't ceased it. and it smells like its getting oil and smokes a touch like 2 strokes do. Why have I not ceased it in +- 30 miles of riding. At mostly wot lol cause I wanna see just what its got to offer.
|
|
|
|
Post by acescooter on Oct 9, 2014 20:46:52 GMT -5
They do make an oil pump that doesn't use a cable. I've seen it on a few scoots. What you guys can't tell when the oil pump goes out? Your scooter sounds like a rocket and performs like a 150cc...lol |
|
|
|
Post by acescooter on Oct 9, 2014 20:47:44 GMT -5
Sitticuss what is the name of this pump you talking about?
|
|
|
|
Post by oldgeek on Oct 9, 2014 21:01:06 GMT -5
 The electric choke is on by default. Running the scooter sends voltage to a heater in the base of the choke, that eventually closes a valve, stopping the flow of the extra fuel. You might try cleaning your old carb real good, and putting it back on to see if it works better. The new carb may have totally different jets than the stock one did. |
|
|
|
Post by acescooter on Oct 9, 2014 21:04:25 GMT -5
The electric choke is on by default. Running the scooter sends voltage to a heater in the base of the choke, that eventually closes a valve, stopping the flow of the extra fuel. You might try cleaning your old carb real good, and putting it back on to see if it works better. The new carb may have totally different jets than the stock one did. |
|
|
|
Post by acescooter on Oct 9, 2014 21:08:11 GMT -5
Oldgeek I appreciate the info. Do you know how much voltage is needed to run the heater and eventually close the valve? How would you recommend testing it?
Im thinking of taking them both apart(the carbs) and comparing what the have in each of them.
|
|
|
|
Post by Sitticuss on Oct 9, 2014 21:19:52 GMT -5
|
|
|
|
Post by niz76 on Oct 9, 2014 21:29:59 GMT -5
Here's a vid to check the auto choke (enricher) HERE. |
|
) The throttle cable goes into a "Y" splitter that splits off into two cables. One cable goes where you mentioned- the slide on top of the carb. The 2nd cable goes down underneath the engine to the oil pump. When you twist the throttle, one cable moves carb slide and you accellerate, the 2nd moves the oil pump and it puts oil into the fuel via the carb automatically so you don't have to pre-mix like most other 2 strokes. Make sense?
