I bought a fixer upper warrior 350 last month overly confident with my small engine repair skills. I am $1000 into this project and still unable to get it running and I'm starting to get frustrated. I have the service manual and have been searching google and forums non stop without luck so any advice would be appreciated.
So heres what's going on:
Battery is in spec, stator in spec, bright blue spark from new plug, motor is in time (checked flywheel, and head marks, confirmed cylinder is tdc), pulled head and piston/cylinder look good. I haven't done a compression test but compression feels strong putting finger over spark plug hole (pulls air through carb/out exhaust), starter turns motor over fine, inspected and adjusted valves, seem fine. Brand new caltric carburetor from Amazon (original damaged), carburetor inspected and adjusted. New oil, air, and fuel filters and of course new gas. All lights work and appears to shift into gears correctly.

Have tested 3 different stators and 3 different cdi boxes.
Motor occasionally putters or backfires (mostly nothing).
Have tried quick start fluid - no change.
Have tried bypassing parking brake and clutch sensors.

I will take and upload any photos requested
Thanks in advance!

 

Welcome to the forums.

Have you looked at the timing marks?

 

Yes timing is correct - 'T' on flywheel, dash on crankshaft gear, and mark on head all line up. Also confirmed piston is at top.

 

Does it idle? Then when u gas it it pops and backfires? If that's the case check the parking break make sure its completely off? Good luck..

 

Does not even idle

 

Do a compression test, but it seems a lot like a faulty carb. I have a "frankenstein" bike in at the moment, brand new engine/carb etc, won't run. I squirted gas from a gas blowlamp down the intake, fires up and runs if you get the amount just right, will even run on fuel once it has been going a while, but won't rev up. So looks like a faulty new carb. Try this method if you have a blowlamp or small camping gas stove.

 

Thinking the same. I'll give it a shot. I'm not 100% on carb, compression, or valves.

 

Update on "frankenstein" bike, the engine is a Chinese copy of a Honda GX engine in a Suzuki frame. Whoever installed it had somehow fitted a carb spacer between carb and block instead of carb and air filter, so it was sucking air at inlet manifold, and running very weak. Doesn't help you, but it has taken me ages to find it as I don't work on GX engines much, so assumed the spacer was as fitted by the factory, it wasn't.

 

 

Piston


Cylinder


Exhaust valve
I'm gonna replace the piston, cylinder, and valves. Cylinder had more scratches than i first thought and found a chip in the exhaust valve.