Bought a 2000 DS650 with no motor but all other parts. Found a used motor and installed it. Went through all wiring and cleaned everything. Cleaned the carb, new carb boot, flushed rad, cleaned oil tank and screen filter, new oil filter, air filter, new plugs, new battery. Total into it at this point is just under $1000.00 and don't want to get carried away.
I was told the motor was running but have had no luck getting it to start. When it turns over I can here it firing but will not start up. It has spark and seems to be getting gas. Going to check compression and maybe check the spacing on the coil trigger.
Any advice would be appreciated. Any other ideas would be great!!
Thanks.

 

cant use a standard comp tester you HAVE to do a leak down test

how cold is it? mine is SUPER hard to start when its snowy outside/ below freezing

 

How is the leak down test done and how is this different then a regular compression test?
Its been 35Degrees or so the last few days.
When I place my finger over the spark plug hole it doesn't seem to have much pressure and also draws my finger into the hole. Seems to have pressure and suction but not real strong.
Was reading and researching and was told to check the valves. Not sure but will give it a shot.
Any advice is great and thanks!!

 

Try hooking it up to a charger and put it on start. These beast need alot of juice to get started.

 

I have a new batt and it was hooked up to a charger. It is turning over just fine. Doesn't seem to be the issue.
Spark has been tested out of the cylinder and also under compression. Spark is good.

 

Both plugs sparking? If so sounds like fuel, right? I've check compression on these. With the compression release I was still getting like 80psi.

 

for cold weather starting pull your choke all the way out, load up with ether (i pulled the boot so i was spraying into the carb, WOT crank it and play with the throttle position and once it kicks try and keep it running.

once i got it started i also turned the idle wayyyy up so it wouldnt die tell it warmed up and then i dropped it back down