I believe I have pre detonation (spark knock)

if you mean you get more power when the noise happens, then maybe you are 4-stroking all the time and only 2-stroke uphill
 
no... i lose power when it makes noise.. it happens uphill to.. if i hold the cluch in it revs fine.. when im riding it does this.. i have went back to stock tensioner as well
 
if a main bearing is going bad, you'll lose power when it shakes enough to cause the seal on that side to leak a bit
 
crassius said:
if a main bearing is going bad, you'll lose power when it shakes enough to cause the seal on that side to leak a bit
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ok.. i was wrong it does do this in neutral as well.. if its a bearing it was messed up from day 1
 
just pry up on each end of crank with a screwdriver to see if it moves
 
You say your bike is a daily driver for a year, your exhaust pipe might be clogged. Try taking it off for a quick test run and see if you get a huge power boost.

Haven't found a way to clean them I just had to put a new one one
 
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