The bike ran but was did not have the power off low end or top end. I checked compression they were 110, 105,110. Also had notable piston rattle.
Pulled the top end and here is what I have.
Scoring on middle piston. Is liquid suppose to be in the cavities in the crankcase around the pistons?
Heads, right being the cleaner side.
Bore is 54 mm stock and they all look like that with my inexpensive mic.
The top of the left piston has a protrusion on top with the center having an indention and the right having indention though less than the center. Is that the start of holing a piston??
This is the worst cylinder (center) the others look okay from a quick look. The center has some scoring.
Recommendations? Hone and new rings, bore and go oversize?
At what point do you know you have to go oversize and how far can you hone one Before having to go up?
GT380 Top end
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GT380 Top end
Terry
Maybe poker's not your game, Ike. I know! Let's have a spelling contest~
74 Suzuki GT750 / 74 Suzuki T500 / 75 Suzuki GT380 / 97 & 01 Honda Magna / 03 Kawasaki KX250 / 01 Yamaha WR250F / 03 Yamaha TTR 125L
Maybe poker's not your game, Ike. I know! Let's have a spelling contest~
74 Suzuki GT750 / 74 Suzuki T500 / 75 Suzuki GT380 / 97 & 01 Honda Magna / 03 Kawasaki KX250 / 01 Yamaha WR250F / 03 Yamaha TTR 125L
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Looks like your ready for a rebore and new pistons. Check the wrist pin bearings, I rebuilt a 380 a few years ago and one of the wrist pins was worn WAY out, let the piston flop around a lot. Check to see if there is ANY up and down slop on the lower rod bearings. May could find another motor or a cylinder set on ebay, I think boring is about $50 a hole plus pistons and gaskets, would add up in a hurry.
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Do you know the max clearance is between the piston and cylinder wall?
The Center cage bearings came out like this. Rod seems okay.
The Center cage bearings came out like this. Rod seems okay.
Terry
Maybe poker's not your game, Ike. I know! Let's have a spelling contest~
74 Suzuki GT750 / 74 Suzuki T500 / 75 Suzuki GT380 / 97 & 01 Honda Magna / 03 Kawasaki KX250 / 01 Yamaha WR250F / 03 Yamaha TTR 125L
Maybe poker's not your game, Ike. I know! Let's have a spelling contest~
74 Suzuki GT750 / 74 Suzuki T500 / 75 Suzuki GT380 / 97 & 01 Honda Magna / 03 Kawasaki KX250 / 01 Yamaha WR250F / 03 Yamaha TTR 125L
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Mine looked like that but the wrist pin was really shot, look here for the specs.
http://www.3cyl.com/
http://www.3cyl.com/
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http://kawtriple.com/tripleed/dalegt380/sm20.jpgTLRam1 wrote:Do you know the max clearance is between the piston and cylinder wall?
The Center cage bearings came out like this. Rod seems okay.
the older i get the faster i was
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