New 80cc engine won't start

L

lilchunkyboy

Member
hi, i have a 80cc 2 stroke engine that I mounted on to a bike of mine recently finished it off,
flipped the choke up ) went to start it held in the clutch got some speed and released the clutch, it kinda just bogged along, it didn't sound like it wanted to start, let alone even fire up

it has compression, spark and and a tank of fuel(I am thinking it is something to do with fuel/carb because carb tends to leak a lot)

(did the same thing for about 10 minutes)from then till now I have searched the internet done every thing I can since.such as checked for spark, made sure there's petrol, checked compression, took carburettor apart to check fore anything stopping it, unplugged killswitch
i actually dripped a tiny bit of gasoline into the cylinder still it hasn't started up
once or twice it has fired up then quickly bogged out
I really don't know what to do anymore, this is taking too long god I hope it works out

regards,harry
 
Welcome to the forum, after trying to start it is the spark plug wet or dry? If it wet you're not firing right, check the magnet for the magneto, with the piston at TDC the keyway should be at about 1 o'clock, they have been found installed backwards.
Screenshot_20190728-210536.png
 
Try starting it with the choke off or half way. Gap the plug to half what’s specified. Takes 4 times the energy for the spark to jump twice as far.
 
Buy a bikeberry super magneto with a stage 1 cdi from bikeberry can't be beat, (tip, file down the contact side of the magneto to the bike engine or sandpaper
 
Your carb shouldn't leak, you need to fix the leak. Read this thread, it's old but it's got lots of info.

So your HT bicycle engine won't start, well let's take a look

Chinese HT engine won’t start? Well let's see what might be the cause of your problen. Electrical 1. Improper wiring. Black magneto wire to black CDI wire, blue magneto wire to blue CDI wire. White…either remove or isolate. 2. Kill switch defective. Do not hook it up until you get the engine...
motorbicycling.com motorbicycling.com
 
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