2004 Yamaha Grizzly 660 Clean

Here are my 2004 Yamaha Grizzly photo albums if anyone is interested in checking out. 😎
 

Hi can someone please give me some sort of idea I have a Yamaha 600 grizzly four-wheel-drive I have put a new coil and a new stater and Pulse stater on it with new plug and steel can’t get any fire

not sure where to post this but,
 
I have a 2016 yamaha grizzly 700 with a blown up transmission (again).
 
I was wondering if a 2015 Yamaha grizzly 700 Main drive transmission shaft and gears shift drum will fit on my 2016?

The small waterline insert for the hose that goes from the water pump cover to the thermostat housing has corroded off. I only need the insert on top and behind the thermostat housing that the hose goes over and can't find just the insert. It looks like it may be pressed in. I've have been told the entire motor housing needs to be replaced. The pic with the red line indicates where the hose and insert would be and the insert looks like the pic of the water pump  Any ideas would be really appreciated.