49cc Vs. 49cc Which Knock Off is the Best??

I did a compression test on my 2005 Bombardier Traxter 650 CVT and it's 75 PSI.  service manual only talks about leak down test.  No specification for engine compression the manual.  What does 75 PSI tell me?  Thank in advance.
 
A little history of this machine.  640 miles.  Picked it up about 2 years ago, not running. Probably the computer.  Tested all circuits and confirm it was the computer.  Long story short, I watched a Youtube video and fixed the computer. ATV now started and runs.  BUT, it tops out 20 MPH.  I cleaned the carb 3 times also using a Mikuni carb kit after the second time.  Slide in carb is going up and down.  Only adjustment for fuel is at 1.5 turns out.  NGK Sparkplug had soot on main part but brown on the electrode.  Champion sparkplug is brown.  I check CVT clutches and they both appear to engage like they suppose to.  Checked valve clearance it's 0.00, I can't get any feeler gauges in-between.  I check timing chain I believe it's in the correct position and hasn't skipped.  I removed muffler plug and drilled into muffler to try and make sure it wasn't plugged.

So I've got a Hisun 550 that I was doing some work on that required removing the CVT and it's housing. Upon attempting to reinstall the clutch, sheaves, etc, I found that the belt no longer fits - it's far too wide. None of the parts have been replaced, they're all OEM. Exactly the same parts as what I took off a few weeks ago.
To be more specific, my belt is 1.25in wide, but the gap between the clutch and the primary sheave is only 7/8in wide. I'll include a few photos to explain.
Has anyone ever experienced such a bizarre problem? Any help at all would be appreciated, I've been stuck on this for a month. I'm open to just about any suggestion.
Photos: 
 

If you had to choose one mod that you couldn't live without, or had to recommend one what would it be? 

So we are almost a month into winter and I've been so busy working on my house that up until today, I didn't realize that we just haven;t gotten any real snow yet to warrant putting the plow on my grizzly. So that got me thinking, what are the latest plows out there and what ATV plows are the best? I've got 2 snow plows for my grizzly, a quadboss pile driver atv plow set up and a snowsport ATV plow. They are both a bit dated now and I tend to stick with the snowsport due to ease of use and I just like it so much. So if you have a plow on your ATV, please let us know what it is and post a picture with your atv/plow would be awesome. Would also like to know what you like and dislike about it.
This is back a while when I did a write up on these 2 plows.... in 2009 I got the snowsport and in 2012 I got the quadboss.
 

So I've got a Hisun 550 (clone of a Yamaha Rhino 660) that I was doing some work on that required removing the CVT and it's housing. Upon attempting to reinstall the clutch, sheaves, etc, I found that the belt no longer fits - it's far too wide. None of the parts have been replaced, they're all OEM. Exactly the same parts as what I took off a few weeks ago.
To be more specific, my belt is 1.25in wide, but the gap between the clutch and the primary sheave is only 7/8in wide. I'll include a few photos to explain.
Has anyone ever experienced such a bizarre problem? Any help at all would be appreciated, I've been stuck on this for a month. I'm open to just about any suggestion.
Photos: