Yamaha 2002 Grizzly 660 hard to start when cold
I just picked up a used Grizzly from a friend. It is very difficult to start when cold (~ 40 degrees). With full choke, or half choke it took me about 5- 10 minutes to start the bike, I was almost going to give up. The choke seems to work since if I try to put it back on when the bike is warm the bike will die. I have not done any troubleshooting yet to confirm if the choke is fully closed. I did install a new plug, to no avail. Apparently this has been a problem since it was new. It has 700 miles and 65 hours on it.
Any advice or suggestions would be welcomed; I know the valves have not been adjusted. My friend has even tried to use “quick start fluid” but it does not helped. One thing I noticed that is interesting is that it has a better chance of starting if I use the pull rope, yet the electric starter turns over quite fast. Perhaps the coil or ignition system is weak and the starter takes too much current from the spark, I doubt it, I’m reaching here.