any bike mechanics on here need some advice

[supersmooth315]

so as its titled need some advice i fitted a 150 cc to my apache and now it wont fire up i just cant see why the piston is the right way around rings in the right place just cant get it to fire up just keeps ticking over

[bikerdoc]

check cables, ignition, fuel, air, spark... check compression... and heaven forbid the kill switch isn't... is it? Hmmm not easy to diagnose via the www... bit like prospective patients looking for a medical opinion or diagnosis over the net... meh... doesn't really work out.

[supersmooth315]

check cables, ignition, fuel, air, spark... check compression... and heaven forbid the kill switch isn't... is it? Hmmm not easy to diagnose via the www... bit like prospective patients looking for a medical opinion or diagnosis over the net... meh... doesn't really work out.

how would one check if there is spark coming from the spark plug and if fuel is reaching the engine

[supersmooth315]

also been advised to change the jets

[supersmooth315]

and if its compressed properly

[zhu]

you can check the spark by hold the plug against the engine (with the lead on) and hitting the starter you will see the spark if it is happening. A good healthy spark is blue. Check the fuel by undoing the drain at the bottom of the carb bowl, once you know its got that far it should get the rest of the way to the engine unless the jets are blocked. Are you sure the cam is timed correctly? Does it have compression?

[supersmooth315]

been advised about the timing and how it needs to be lined up and how di i check the compression

[zhu]

stick your finger over the plug hole and hit the starter , if it pushes your finger away it has compression, you could use a compression gauge , usually you can hire them

[supersmooth315]

stick your finger over the plug hole and hit the starter , if it pushes your finger away it has compression, you could use a compression gauge , usually you can hire them

thanks very much will check in few

[zhu]

no worries. Its also a good idea to use new gas especially if the bike sat for any length of time .The gas gets stale and loses its desire to burn