Maintenance & Technical > KX500 Original
Not my day :(
no sub for cubes:
having recently put my kx together,and being told by the guy i bought it off the engine had been fully rebuilt i got it going and going and was pleased as punch....(for all of 2 weeks anyways)i had only run it up and down the road a couple of times as still finishing off bits to it..anyways last weekend started it up which it did fine ran it a couple of mins to then find it smoking bad :?......couple of questions on kxriders later and the symptons confirmed crank seals gone!!!grrrrrrr
so to cut a long story short started pulling it apart today,engines out now but on close inspection my very very low hours use piston has a gouge down the front exhaust side :-o....now as far as i can see the cylinder looks ok no marks to correspond with the piston marks..i have included some pics and must admit it looks worse on the pics than it does in real but is it at all poss to lightly sand out this mark or is it time for another new piston :-(
all advice much appreciated
BDI:
The seizure was most likly caused by the main seal. When I was younger cleaned up pitons a few times and road the hell out those bikes. I would say yes you can clean it up I wouldn't recomend it but if you were to do it, I would but a nice criss cross on it like a freshly honed cylinder. I would also put fresh rings.
cutting torch:
If most of that scuffing disappeared with a scotch-bright pad rub-down, and the ring grooves were good, I would reuse it.
I have a question, though.... What is the hole above the wrist pin bore for? Is it for pin oiling?
torch
kaw rider:
Looks like a lite four corner seizure.
martinfan30:
--- Quote from: cutting torch on March 15, 2009, 09:05:08 AM ---If most of that scuffing disappeared with a scotch-bright pad rub-down, and the ring grooves were good, I would reuse it.
I have a question, though.... What is the hole above the wrist pin bore for? Is it for pin oiling?
torch
--- End quote ---
Thats a good question. its not really a hole, just a small cavity that may be used to hold oil for the gudgeon pin as you suggest. Just my thought.
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