|
Post by rexxk on Jun 22, 2014 3:02:48 GMT -5
wait 15 hours and let the engine cool off. a cht gauge may read cooled, but something might be hot. and you cant tune it right. i know stuff can get cooled, through at 14 hours. so wait 14 hours. at least.
and do you guys know how to tune a carburetor? what idle rpm are you setting the mixture at? kinda high? set the idle rpm with the idle screw. then adjust the mixture, at idle, with the fuel/air mixture screw. to get the highest idle. if it raises, too much, lower the idle back down, some with the idle screw. keep your rpms the same, while adjusting the mixture screw, and getting the highest rpms. just make sure the idles, a little high. when you do it.
if its highest idle, well. measure how many turns out the mixture scrwe is out, from all the way in, once its set. by counting the number of turns in, it is. out. then screw it back out and set it back where it was again.
then if its, under 1 1/4 or over 3 1/4 something like that. then adjust the pilot jet. but once thats set, then it should be revving back no problem. make sure not to set idle mix until the bikes warmed up. if it cuts out, go out ride around make sure its set. make sure the screw the mixture screw isnt too far, out or in. maybe need to swap a pilot jet. make surte to go out and ride around some and make sure its warmed up. first. sometimes it takes 10 minutes of some riding to get it to runnign temperature. but go out and getting it to runnign temp before you set your idle mixture. cause the choke will take care of it until it warms up. and also the automatic choke will stay on until its warmed up, according to, a timer..? or the carb heating up from hot air off the motor.. ? right temperture? id ont know. go ride it around for 10 minutes. if its not setting right, if its cutting out, ride it to warm it up. try to adjust it. adjust it then ride more to warm, if its not stopping cutting out, ride until its warmed, like 10 minutes around. set idle mixture again. if it doesnt stop cutting out. maybe make small, adjsutments. if its blurbing or sounding airry, turn the screw, out for more air if thats it,k that means its, rich. if its cutting out, turn the screw in, its too lean to stop more air from gibnign the gas too much air. making it cut out.
... if your too far in or out, change the pilot. if your close, to 1 1/4 then your probably too rich. if your over 3 1/4 your probably too lean. rich, then lean the pilot jet. smaller size. Lean, then richen the pilot jet.
if your lean, then also check for air leaks. more. make sure your plugs if you got any on your lines arent leaking. dont use any wood to seal lines with. check hoses for cracks, leaks. if its new, they snouldnt be leaking, cracking or cracked.
make sure the connections are tight. use hose clamps.
|
|
|
Post by rexxk on Jun 22, 2014 3:04:50 GMT -5
if your adjusting yoru idle mixture at 3000 rpms it probably should cut out when your rev the throttle back. but with an airleak too, it would make it cut out and quit too
|
|
|
Post by geh3333 on Jun 22, 2014 22:42:12 GMT -5
Good catch by GEH3333 on both fronts, IDLE AND TACH registering wrong, I was not paying attention to the sound of the idle that it may be to high, I was just going by the tach, MY BAD. But I always say more heads are better than one. GREAT!! So now you will have to adjust the VALVES, set them both to .004 inchs YOU DO have a feelers gauge right? And the feeler gauge should be marked .004. Line up the Cam Sprocket like this and set them both. Then grab the Variator and turn it over by hand a couple of times and then line it sprocket up again and TRY TO INSERT the .005 feeler gauge it should not go in only the .004 feeler gauge to make sure before you put the valve cover back on. Then start it up and RE-ADJUST the carb to get the highest IDLE after it has idled for at least 5 minutes. Thanks alley , It feels good to get something right sometimes , lol . Glad I can help . Hopefully he gets it running right now.
|
|
|
Post by alleyoop on Jun 22, 2014 22:52:24 GMT -5
I sure hope so what 27 pages of this DANG. Should be turned into a NOVEL
|
|
|
Post by geh3333 on Jun 22, 2014 23:19:48 GMT -5
I sure hope so what 27 pages of this DANG. Should be turned into a NOVEL Lol
|
|
|
Post by rexxk on Jun 23, 2014 2:17:49 GMT -5
the perfect top dead center is checking a screwdriver with your piston. turn it until its at the topback if you passed do it like that. way. after adjusting mine the bike plus i also switched over to 5 gram sliders from 5.5 and my scooter wanted to wheelie on me when i took off, first.
|
|
|
Post by jerseyboy on Jun 23, 2014 7:57:51 GMT -5
When I spin my motor around with NO plug it naturally settles in the correct spot to set the valves,,almost like it relaxes there..I don't even look at any timing marks on fly wheel,,just the cam holes,,just do it like Alley says,,the screwdriver is also a good idea if your not sure,,you can feel it when its perfect TDC.
|
|
|
Post by spandi on Jun 23, 2014 8:18:30 GMT -5
I sure hope so what 27 pages of this DANG. Should be turned into a NOVEL Idle worship?
|
|
|
Post by bille on Jun 23, 2014 19:08:17 GMT -5
I made few small videos, one showing how I adjusted the valves, one showing my spark plug, one showing the few vac lines I have left, etc. The last one is my trying to get it to idle at around 2000 RPM, which I wasn't able to do. I merged all the videos together into one so you guys can see what I see:
EDIT: youtube didn't merge it all, adding the other videos now.
Here is the rest of the valve adjustment that got cut off:
Hoses and stuff:
Spark plug:
The idle now:
|
|
|
Post by alleyoop on Jun 23, 2014 20:16:31 GMT -5
That is NOT idling at 2000+ rpms no way no how. Turn the Idle speed Screw clockwise A HAIR. Do you have the belt on the CVT as well? Seems like it is not getting gas. Have you checked if when cranking it fuel is flowing to the carb? Alleyoop
|
|
|
Post by jerseyboy on Jun 23, 2014 20:21:26 GMT -5
It doesn't sound too bad when its running,,as many times as you cranked it to start I'm still thinking air/fuel issue,air leak.Too bad you don't have another carb to try on there...also here is the video to check some of your electronics values,,its for 150 but they are very similar if not the same,,just too rule some stuff out bro..I think you are doing very good so far,,this scooter is just being a bear,,and its prolly a simple fix,,just hard to pinpoint...
|
|
|
Post by bille on Jun 23, 2014 20:34:20 GMT -5
That is NOT idling at 2000+ rpms no way no how. Turn the Idle speed Screw clockwise A HAIR. Do you have the belt on the CVT as well? Seems like it is not getting gas. Have you checked if when cranking it fuel is flowing to the carb? Alleyoop The belt is back on the CVT and was on in the video. A day or two ago, I drained the super grade gas out and replaced it with regular, just to see if there would be a difference. How I did that was I opened up the drain screw at the bottom of that hose coming off of the bowl, directed it into a gas can and started up the bike. The gas flowed pretty good into the gas can the whole time. So, that was the gas going from the gas tank, past the fuel filter, into the carb, down the bowl and back out again. I think that means this isn't a fuel issue?
|
|
|
Post by bille on Jun 23, 2014 20:35:02 GMT -5
It doesn't sound too bad when its running,,as many times as you cranked it to start I'm still thinking air/fuel issue,air leak.Too bad you don't have another carb to try on there...also here is the video to check some of your electronics values,,its for 150 but they are very similar if not the same,,just too rule some stuff out bro..I think you are doing very good so far,,this scooter is just being a bear,,and its prolly a simple fix,,just hard to pinpoint... Mine bike is a 150. I will find my meter and give this a shot, thanks.
|
|
|
Post by alleyoop on Jun 23, 2014 21:17:59 GMT -5
Looking for anything notice the SPARK PLUG CAP is sure sticking out a lot is that on the plug good. But that sounds like fuel starvation to me, and the RPMS appear off again did that meter get bumped and change on you. I would give the IDLE SPEED screw a little hair of a turn because it was idling to low. Alleyoop
|
|
|
Post by geh3333 on Jun 23, 2014 21:22:24 GMT -5
The last vid sounds like It is pretty close to 2000 rpms . Mine idles right at 2000 " yes this is about 300rpms higher then normal" mine wants to stall near 1800 rpms so I just leave it where it is as long as the clutch isn't engaging . I can understand this with my setup but not sure why yours isn't wanting to stay idle .
|
|