125cc pit bike wont start has spark compression and fuel

[2fast4u2]

hey guys i bought a bike that didnt start from the begiining the bike has sparks, compression , and fuel i also checked timing it was on tdc and cam position at 9 oclock. the bikes flywheel has been swapped with an inner rotor kit from ebay. it has a strong spark blue aswell. i dont know whats wrong please help. the way i did tdc was that i shined a flash light down the spark plug tube and looked at the piston coming back up i put it on tdc and checked cam timing and it as at the 9 oclock position aswell please help. ive been trying to get it started for almost 3 days now no luck.

[XdanthemanX]

maybey your jets are bloked in the carb or your valves might need cleaning tacke the head off make sure the valves are in a closed get some petrol tip some into the little circle were the 2 valves are and if it comes out the bottom of the head were the came is your valves arnt closing properly and need re grinding (cleaning)

this is the best i could xplain it im new to this pitbike club hope this helps you good luck

[2fast4u2]

thank you for your response i just cleaned the carburetor and i did do a compression test and it pushes my finger out of the hole. the bike has spark kill switch isnt turned on either and its getting fuel because even when i spray starting fluid down the sparkplug hole it still doesnt try to fire up i checked timing anyone else out their please help

[XdanthemanX]

Originally Posted by 2fast4u2

thank you for your response i just cleaned the carburetor and i did do a compression test and it pushes my finger out of the hole. the bike has spark kill switch isnt turned on either and its getting fuel because even when i spray starting fluid down the sparkplug hole it still doesnt try to fire up i checked timing anyone else out their please help

try the valves i hade the same problem and it had loads of compreson put it woundnt start it would only start if i bumped it down a abig hill so i cleaned my valves and it started first kick

[2fast4u2]

Is their any other way in order to clean my valves I will need to take off the head correct. Also I made sure Jill switch wasn'tOn and it wasn't. Do I need to remove the valves to clean them. Also all the starter fluid when I sprayed it down the spark plug tube when I removed the exhaust on the bike it was all wet in their like it had startin fluid and I smelt it and I was starting fluid.

[XdanthemanX]

Originally Posted by 2fast4u2

Is their any other way in order to clean my valves I will need to take off the head correct. Also I made sure Jill switch wasn'tOn and it wasn't. Do I need to remove the valves to clean them. Also all the starter fluid when I sprayed it down the spark plug tube when I removed the exhaust on the bike it was all wet in their like it had startin fluid and I smelt it and I was starting fluid.

yess you have to take the head off and take the valves out youll need a sping compressor look on youtube on how to take them out then youll need to get some grinding past and a grinding stick look on youtube thell tell how to do it

[mereece97]

it sounds like it is the valves or the carb needs cleaning