250 trail boss piston #s
#1
250 trail boss piston #s
January 06, 2010 05:32 PM Hey,
I'm working on rebuilding a 98 250 trail boss.I bought the 250 for $100 and for the most part its all here.I took the cylinder off and it look like it ran hot.There are some scarring below the intake & exhaust ports on the cylinder and scarring below the rings on the piston. The crank to rod bearing was also shot.I bought a used 93 crank off of ebay, plus a full gasket kit. Would you just hone the cylinder and put new rings in it? Also what is this number on top of the piston, I know the (F) is for the flywheel side but what is (5W)?
Any info on this thing would be great. I'm on a very tight budget so please be nice.
Thanks
I'm working on rebuilding a 98 250 trail boss.I bought the 250 for $100 and for the most part its all here.I took the cylinder off and it look like it ran hot.There are some scarring below the intake & exhaust ports on the cylinder and scarring below the rings on the piston. The crank to rod bearing was also shot.I bought a used 93 crank off of ebay, plus a full gasket kit. Would you just hone the cylinder and put new rings in it? Also what is this number on top of the piston, I know the (F) is for the flywheel side but what is (5W)?
Any info on this thing would be great. I'm on a very tight budget so please be nice.
Thanks
#2
Have the cylinder measured as to what size piston is needed!! Dont just assume a standard piston can be installed. Clearance between piston and cyl should be around .002 after honing! Have a shop measure the cylinder and have it bored and honed to proper over size.
If the cylinder is scored,it WILL have to be bored Sizing is the key to proper piston and rings. The 5w you mentioned is a stock piston,it probably needs just first over size piston. OPT
If the cylinder is scored,it WILL have to be bored Sizing is the key to proper piston and rings. The 5w you mentioned is a stock piston,it probably needs just first over size piston. OPT
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