Te250 -06 starting problem

Here´s the deal... I just bought me a Te250 -06 4-stroke with Keihin carb. The guy who sold it to me told it was hard to start when Cold. (Yeah I got it cheap…)

We had to run with the bike to get it to start so I got a tip that it could be the compression. We did that about 2-3 times on different occasions and one time we got it to run for a while so the Engine got warm. And then the Electric start would function!

Now the last time we tried to start it did´nt work, we had to run the bike on second gear. Then it would stall on us and did not start again. I guess the carb got flooded because it smelled like gasoline. Had it standing over night and now all of a suddden there is no spark.

I measured the primary and secondary on the ignition coil and seems ok. I got continuity and 10,85 on the other.
The starter is to okey. Continuity between the Contact and ground. And the TPS seems okey.

Where should i try next?
Is my problem mechanical or electrical? Or maybe both?

(Sorry for the bad English sometimes, because I´m Swedish... Hej alla! )