1997 Yamaha 200 SWS2 block damage-repair

myredchevys

Cadet
Joined
Apr 1, 2008
Messages
21
Lost the piston pin bearing (top port piston) on powerhead- Planning on boring or resleeving the cylinder-got gouged in a few areas from the needle bearing rollers - I noticed a small hole in the bottom of the block -See Pic- just wondering if not repaired or filled will it effect compression-what would be best coarse to repair-thanks
IMG_2015_0.jpg
 

racerone

Supreme Mariner
Joined
Dec 28, 2013
Messages
36,044
Is the block all apart ?------Is that hole in other cylinders ?-----More pictures ?
 

myredchevys

Cadet
Joined
Apr 1, 2008
Messages
21
Just lost the one cylinder -the other cylinders are undamaged 120psi compression- it looks like a needle from the piston pin bearing got smashed into the block by bottom of piston
 

racerone

Supreme Mariner
Joined
Dec 28, 2013
Messages
36,044
So you have not taken the block apart and doing the repairs with the other pistons left in place ?
 
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