cleaned carb on 110 pit bike lifan block started first time now wont start again fuel and spark both there any advice would be most welcome
Not a whole lot to go on, but sounds like you are not getting enough fuel, meaning it is something with the jetting.
I was hoping for an insight into my 1974 F7 issues.
I received the bike in complete pieces and built the motor up from the crank.
I have replaced all seals and gaskets including new crank seals during the rebuild. Also fitted was a new piston along with a cylinder honing.
The bike will not start...it feels like it wants to but there is definately something off.
The carburteor has been gone through several times with the float height being adjusted correctly and all seals, gaskets replaced.
I have succesfully tested the cases for leak down.
I have a great spark and the timing marks are all lined up, I have tried tweaking the plate to check if this helps..it does not.
I have tested the rotary valve timing and the valve appears to open at 115 degree BTDC and closes at 55 degrees ATDC, (specs for year I believe)
I have the valve timed up with the mark aligned to the crankshaft dowel.
Is it possible that the mark should be aliged with the woodruff key?
I do not seem to be getting a good amount of vacuum through the intake when the bike is kicked over.
The raotay valve and cover are in spec.
Any help would be most appreciated as I have torn into this many times without success so far.
Sounds like you have everything correct and it should run. This tells me something very small is the cause, but what I don't know. Run through your fuel, spark, and compression again.
I have rechecked the igntion timing a few times and validated the spark...(very nice blue spark).
The carb has been gone through a few times, however the plug is definately gettimng fuel...perhaps too much, although I have re-checked the carb and float height etc many times also....I can conduct another compression test however on the kickstart it feels like very good compression.
I'm at a loss to be honest
Did you pressure test the crankcase?
Welcome to JunkVlogs Where I answer your questions. Submit your question in the comments and see if you get featured in the next video!