Maintenance & Technical > KX500 Original

Mud and water in my engine :(

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oic0:
Update:

Took me a little while huh ;)

Tore down the top end. As I got in there I realized there is no dirt, its all pure clay. Makes sense in Louisiana. Good part is clay is pretty easy to clean out and has no grit to it. Its actually pretty soluble. Anyhow, cleaned it all by hand with WD-40, tooth picks, Q-tips, and paper towels. Took a LONG time but I had nothing better to do so I made the whole thing spotless. Bottom end didn't have near as much as I thought in it. I filled it with kerosene and worked the rod by hand. It all slung frothed out. Add more, repeat, repeat, repeat, repeat. It really only took two or three times since clay doesn't fight too hard, the rest was just to be sure. I put it all back together and it started pretty easily. Chugged out smoke till the last bits of WD-40 and kerosene were clear then ran good. I had a hard hard time judging the compression since my legs are in much better shape than they were last I had it running so I'm going to compression test it first chance I get. It wasn't hard to start though and it was running pretty crisply so I have high hopes.   
I made a video of starting it but I looked too dorky and my underwear showed a few times, so pic it is!


Next up, fork seals, spokes, new front tire, lube linkage and swing arm bearings, ponder the functional yet stripped oil drain plug, and have old man weld me something to guard the sub frame from the chain.

jonny500:
i had a kx 250 that i totaly submerged (i had to swim out) it was in for about 5 mins. i was miles from anywhere so had to sort it there and then. took the plug out and kicked it over to get water out of cylinder and bottom end. let it stand for while so the  fuel in the carb and tank settled. then took the drain plug out of the bottom of the carb and let all the water out until the fuel ran clean. anyway that got it going and after a bit of sputtering it rode home fine. did a bit of a service when i got it home oil, filter ect and was very pleased with my self. which is all good right, WRONG after a while the bike just went down hill. vibations loss of power ect as the the grit and grim did is work. the bike which had been the best i had owned was basically ruined after a while even after a rebuild in later months it was never the same. in hind site i would have striped to the last  bolt. dont mean to scare you i just dont want you to go through the same as me. think carefully my freind
good luck
john

kwakman:
Its your call on pulling it down but a very small amount of dirt will wreck your main bearings, plating etc....wd40 is the best way to prevent rust, I usually coat everything metal after washing etc as it displaces the water and if it aint wet, it cant rust.The 500 cases are the first ones I have ever split, but if you have a modicum of mechanical apptitude and common sense, you'll be fine.If I can do it, you can..... :roll:

Hillclimb#42:
kwakman, you are right that the wd40 displaces water. Its great for breaking down oxidation, and cleaning properties that is has. Unfortunately, it is corrosive. Its on the lable. Kinda surprised you are getting good results. Not trying to be a know-it-all. that was pointed out to me 30 years ago while cleaning guns.

kwakman:
its a valid point.Compressed air is my favourite method of chasing the water away, but wd does the job if your away from your garage.

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