cold start problems By cruzroy (Read 433 times)

[cruzroy]

hi guys, 2 week ago i started having cold start issues, the bike is a lifan Gazzalle 150cc it has 1746 miles on it, i use to start it in the morning it would rev high on its own and go down when warm, but now you have to hold the throttle till shes warm, (things i have done so far), i have put brand new air cleaner, brand new plug, and i install a brand new auto choke,(someone said it might be that, and while taking the seat apart i found the tube from the head was just dangling, i did not now where it went and i noticed a little stud where the intake tube goes to at the air cleaner,(but man it was hard to go on) but i got it on..BUT! without a vacuum diagram im not sure i did it right, BUT anyways i still have a cold start problems, i have to hold the throttle to keep it running till its warm, i think i have a vacuum problem.??.....thanks for any help

[royldoc]

Have you adjusted the valves? With 1746 miles it's time, they are probably tight. set intake to .004 and exhaust to .005.

Roy

[cruzroy]

should they be set at cold or engine at hot temp

[royldoc]

Valves should be set with the engine cold. I usually do mine after it has sat over nite.

Roy

[cruzroy]

do you know where the tube hooks up that come from valve cover,,,,i fell of of somthing??

[royldoc]

It is probably a crankcase vent tube. It will go to the air box. A lot of people just put a fuel filter in the end of it and attach it to the frame up high, so oil doesn't drip out and runs back into the engine. then plug the port on the air box. Photo's help, if you can post them.

Roy

[cruzroy]

i will try to take pics or vid by end of day, i also got truck troubles too

[cruzroy]

okay guys yesterday I adjusted the valves 3 times at .004 .005mm, and every time I put her together, I would try to start , and I would get a backfire type reaction, and she still wouldn’t start right...(and before i started it ran good warm,but would not cold start, and all said adjust valves)..then today when I got home after work I tried 2 more times, same, sounded like it was out of time...I never checked it before I started adjustment, and allot of you guys said .004mm intake .005 exhaust, set the T mark, had the big hole in sprocket facing up than adjusted, and put all back together.....it really sucked, HERE'S the kicker, the last time laying down on my back, under the side panel, there is a sticker, all the tutorials show a valve cover with 4 bolts...(mine has only 2, the label says lifan lt150t, it said the gap, air pressure and valve clearance, so for anyone that needs to know THE INTAKE IS .005mm and the EXHAUST is .007mm...SO I will try it again tomorrow and let you know, but it is not .004 and .005....this is a FYI, thanks for all the help, I must have a weird motor...I did see a casting that says GY6, how frustrating are these clones, that they all are a little bit different

[ce]

Uh, dude, the .004 and .005 is in inches, not millimeters.

I don't know what .005 and .007 millimeters is in inches, dude, I can barely handle the Chinese, but it sounds small and foreign, not like Chinese foreign, but like European foreign...

[sprocket]

.004INCH is .10mm

and

.005INCH is .13mm

THe manuals are nearly always wrong...