so...
had my cylinder re sleeved after some port work, put in a vertex piston, 66.25mm with 0.05mm clearance. Re cut the head chamber to be 16cc's and my corrected compression ratio is just about 7.5:1..
im running 4% Shell racing M oil in a mix of half new and half old pump gas. I have added about 1.5 maybe 2 degrees of spark advance..
climbing a hill towards the end of the long break in period in 4th, ive got mid range engine speed and i whack the throttle open.
quad starts to accelerate beautifully and then gives me a loud "click"..
it went click..click..............click
at which point i layed off the throttle and made my way home..
i was in a rush to get it back to gether, so i didnt check the squish clearance but ill do that tomorrow..
any ideas?
EDIT:
i just changed to my spare spark plug as the one i had in was fouled. I was running a BR8EG..
had my cylinder re sleeved after some port work, put in a vertex piston, 66.25mm with 0.05mm clearance. Re cut the head chamber to be 16cc's and my corrected compression ratio is just about 7.5:1..
im running 4% Shell racing M oil in a mix of half new and half old pump gas. I have added about 1.5 maybe 2 degrees of spark advance..
climbing a hill towards the end of the long break in period in 4th, ive got mid range engine speed and i whack the throttle open.
quad starts to accelerate beautifully and then gives me a loud "click"..
it went click..click..............click
at which point i layed off the throttle and made my way home..
i was in a rush to get it back to gether, so i didnt check the squish clearance but ill do that tomorrow..
any ideas?
EDIT:
i just changed to my spare spark plug as the one i had in was fouled. I was running a BR8EG..