KX Riders
Maintenance & Technical => KX500 Original => Topic started by: Camo on August 13, 2011, 04:35:38 AM
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Bought in this condition.
(http://i7.photobucket.com/albums/y282/CamoKVF700/Motorcycles/IMG_1703Large.jpg)
(http://i7.photobucket.com/albums/y282/CamoKVF700/Motorcycles/IMG_1702Large.jpg)
After a bit of wrenching.
(http://i7.photobucket.com/albums/y282/CamoKVF700/Motorcycles/IMG_2327Large.jpg)
(http://i7.photobucket.com/albums/y282/CamoKVF700/Motorcycles/IMG_2324Large.jpg)
(http://i7.photobucket.com/albums/y282/CamoKVF700/Motorcycles/IMG_2323Large.jpg)
(http://i7.photobucket.com/albums/y282/CamoKVF700/Motorcycles/IMG_2325Large.jpg)
I picked up a 2000 KX500. You should see the roost that comes off this thing. 5th gear wheelies. Retarded. 1st day out I was pulling a 3rd gear wheelie on the beach. Had her straight up just as I shifted into 4th. It started to come over. I went to tap the rear brake and missed the pedal. Eject! Eject! Houston, we have a problem. At that point, it was time to just push it away. Well, let's just say, I've never had a charlie horse that bad in my life! I tried but couldn't get up. A minute later I was up but dealt with a sore right cheek for the rest of the trip. Let me tell you the sand right at the ocean water is as hard as concrete. :-D
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The 250 fender is sick I just installed it in my 93 500. And my ride is exact opposite when I purchased it it was stickered all over and it looked like s**t, so I replaced the plastics but not te tank as it is a oversized ims, I cleaned it up with a plastic renew kit but it does not match the new plastic as it's faded. I took my 500 for a spin down my back alley and it has the same powers as yours when I rolled the throttle the from tire lifted in 3rd gear but I slowed down as I was on asphalt and did not want to ruin it the first ride. Look good tho
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Bought in this condition.
I picked up a 2000 KX500. You should see the roost that comes off this thing. 5th gear wheelies. Retarded. 1st day out I was pulling a 3rd gear wheelie on the beach. Had her straight up just as I shifted into 4th. It started to come over. I went to tap the rear brake and missed the pedal. Eject! Eject! Houston, we have a problem. At that point, it was time to just push it away. Well, let's just say, I've never had a charlie horse that bad in my life! I tried but couldn't get up. A minute later I was up but dealt with a sore right cheek for the rest of the trip. Let me tell you the sand right at the ocean water is as hard as concrete. :-D
Welcome ! SWEET dune bike ! I'm a rocky,muddy East Coast rider, and the thought of the sand dunes get me so jeleous!! That is a monster of a rear paddle tire !!! Enjoy
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Hey Camo,
Sorry to hear about the ejection, but sounds like you'll be o.k.
That is quite a transformation on your bike, looks good.
Did you do any motor work or had the engine been built by the previous owner.
I guess with that rear tire a good stock tune would be a ripper! There are plenty of dune guys who would like to have that tire combo.
Take care & welcome to the K-5 club!
Tuck\o/
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The previous owner had just installed a new top end with no time on it. You could tell it was true bu the wrench marks and gaskets.
Thanks guys!
I love the dunes...
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I had a similar ejection last fall. When I hit the ground the weight of my boot hyper extended my knee. It hasnt been the same since...
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That is a sick looking bike. Nice find. I wish I was closer to the dunes. What brand/model are those tires? I may have to get some and drive 3.5 hours to Silver lake
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http://www.bykas.com/category-s/36.htm (http://www.bykas.com/category-s/36.htm)
His name is Bruce. He treated me well and service was A1.
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The previous owner had just installed a new top end with no time on it. You could tell it was true by the wrench marks and gaskets.
Thanks guys!
I love the dunes...
So my nephew was riding the K5 last night. Phoned me. He was riding our trails with my kids and stalled it in 2nd gear. Went to restart it... he can kick it over by hand. :( Pushed it about 2 miles home. I'm not there and can't check it out yet.
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The previous owner had just installed a new top end with no time on it. You could tell it was true by the wrench marks and gaskets.
Thanks guys!
I love the dunes...
So my nephew was riding the K5 last night. Phoned me. He was riding our trails with my kids and stalled it in 2nd gear. Went to restart it... he can kick it over by hand. :( Pushed it about 2 miles home. I'm not there and can't check it out yet.
Never take a stock jetted K5 too far without a spare new sparkplug ! Especially low speed play riding in the woods.... sounds like your nephew simply fouled a plug.
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Dang...Sorry to hear that Camo.
If you had it down at the beach, and the nephew was riding in the woods You would think it was Plenty rich or overly so
Like Polar said.
So smoking the engine without rejetting the bike doesn't sound right... Broken ring is what would be my first stab with the info available. Hopefully there was no damage to the cyl.
Heck, I had a friend bring me a chainsaw that lost all compression and wouldn't start. He just knew he had to get a whole new top end... I took the cover off the saw, cleaned the threads on the sparkplug, installed it and she was good to go. So Stranger things have happened, let's hope the plug is loose ! :|
Tuck\o/
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OK, i'm confused please provide more details about exactly what happened to the engine .
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I'm at work and haven't looked at it. He said he can kick it over by hand. It tells me there's no compression. Maybe the pug fell out. lol A fouled plug will still be hard to kick over. This is not. It was a brand new plug. It was jetted for sea level and ran great. We live at 2500 feet. It still runs crisp but I left it that way for him.
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I guess my Dad came over and had a look. He took the plug out and put his finger over the hole, kicked it over and no compression. I'm wondering if it over heated and melted the rings into the pistons.
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The previous owner had just installed a new top end with no time on it. You could tell it was true bu the wrench marks and gaskets.
Thanks guys!
I love the dunes...
I feel bad for you dude, you got fu@ked. After reading this post, and then your post about now "no compression" , the only reason a seller replaces the top end and then immediately sells the bike is because the cylinder and or crank is blown, and the seller just want's out quick and cheap.....
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Rats.. sorry to hear about that Camo, it sounded like the bike was running great. I figured if you ran the bike hard at sea level any elevation change would have been up, and worse case senario was the bike would have been too rich.
I don't want to make any accusations, but if you don't think your brother could ride the bike any harder than you did...
Is it possible the fuel can of pre-mix got swapped out for the straight fuel?
If I understood you, your last ride out was at the beach, so I'm figuring you were able to "See what she Had".
The sand / dunes puts a about as hard a load on a bike as you can get.
If the bike held together under those conditions, with you piloting, I don't see how running the woods was any harder on the engine. Now I don't Race and I'm certainly no engine guru, but I know it wouldn't take long to muller up the top end with little to no oil, the bike was jetted for sea level and it wasn't much cooler at 2500' than it was at sea level a few weeks ago. (well not enough to cause the bike to be jetted too lean at 2500')
Sorry Mate, I was hoping the plug just worked its way loose! :|
Tuck\o/
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It ran strong at the beach. Wheelies in every gear. Kick me off the bike when starting if I didn't follow through properly. Start and idle with it crisply pounding. No odd noises other than the normal vibration. There is no way my nephew rode it in the woods harder than I did in the sand. He ran the premix I mixed for him before I left. Maybe the fuel was bad and it detonated? Had that before in my sleds. The fuel was 3 weeks old 93 premium mixed with 108 race 50:1 with synthetic Amsoil oil. Hmmmm. I'll have to go home and investigate I guess. I wonder if the crank seal went. Plug looks decent from what my Dad said.
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It ran strong at the beach. Wheelies in every gear. Kick me off the bike when starting if I didn't follow through properly. Start and idle with it crisply pounding. No odd noises other than the normal vibration. There is no way my nephew rode it in the woods harder than I did in the sand. He ran the premix I mixed for him before I left. Maybe the fuel was bad and it detonated? Had that before in my sleds. The fuel was 3 weeks old 93 premium mixed with 108 race 50:1 with synthetic Amsoil oil. Hmmmm. I'll have to go home and investigate I guess. I wonder if the crank seal went. Plug looks decent from what my Dad said.
post pics of the cylinder and the piston, we should be able to give you a good idea of what happened. pistons always give clues about the failure.
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I will. I won't be home for a week. I'll have it apart next Wednesday. I heard... the motor has to come out to remove the cylinder. Any rumor to this or can I get it apart in frame?
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I will. I won't be home for a week. I'll have it apart next Wednesday. I heard... the motor has to come out to remove the cylinder. Any rumor to this or can I get it apart in frame?
False. Remove the head first then slide the cyl off no problems. You can pull the cyl and head together but it is a VERY tight squeeze.
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I had the same problem, just cut out on me, looked at every possibility, fuel, elec, piston rings etc. had me stuffed what was wrong for ages kept having to tear down the top end to try and find the source. every thing looked fine every time,after reassembly motor would kick over then die. problem was the head studs would torque to specs but would stretch at start up, check all the studs againsta steel rule if its stretched you will see it as plain as dogs balls. ended up making new studs from some grade 8 bolts from the local caterpillar dealer and installing time-serts into the barrel. never reuse studds more than a couple of times especially on any motor thats making any sort of compression.
Hope this helps.
Weirdo.....
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Hey Weirdo Thanks for the Info.
check all the studs against a steel rule, if its stretched you will see it as plain as dogs
You place the rule on top of the cyl where the stud exits the barrel right? The stud pulls up, and the material surrounding the stud "crowns" (for lack of a better term) and forces the head up.
This has occurred more commonly in higher performance applications that I am aware of.
The only way to combat this is I know of was to countersink the stud holes.
Tuck\o/
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It ran strong at the beach. Wheelies in every gear. Kick me off the bike when starting if I didn't follow through properly. Start and idle with it crisply pounding. No odd noises other than the normal vibration. There is no way my nephew rode it in the woods harder than I did in the sand. He ran the premix I mixed for him before I left. Maybe the fuel was bad and it detonated? Had that before in my sleds. The fuel was 3 weeks old 93 premium mixed with 108 race 50:1 with synthetic Amsoil oil. Hmmmm. I'll have to go home and investigate I guess. I wonder if the crank seal went. Plug looks decent from what my Dad said.
did the 93 premium have alcohol? alcohol doesn't mix well with 2t oil. One our local vintage racers lost a Husky 500 topend when he mixed the alcohol premium with his race fuel, he had never mixed the 2 before. ethinol fuel deteriorates much faster, too.
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It ran strong at the beach. Wheelies in every gear. Kick me off the bike when starting if I didn't follow through properly. Start and idle with it crisply pounding. No odd noises other than the normal vibration. There is no way my nephew rode it in the woods harder than I did in the sand. He ran the premix I mixed for him before I left. Maybe the fuel was bad and it detonated? Had that before in my sleds. The fuel was 3 weeks old 93 premium mixed with 108 race 50:1 with synthetic Amsoil oil. Hmmmm. I'll have to go home and investigate I guess. I wonder if the crank seal went. Plug looks decent from what my Dad said.
did the 93 premium have alcohol? alcohol doesn't mix well with 2t oil. One our local vintage racers lost a Husky 500 topend when he mixed the alcohol premium with his race fuel, he had never mixed the 2 before. ethinol fuel deteriorates much faster, too.
What oil was he running and what race FuEl?? I bet the oil and race fuel were more to blame... Some oils don't like low S.G.
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Hey Friar hows it goin? I had to remove all the studs and layed them against the steel rule to find the offender(s). But i also had the crowning issue as well, if you use time-serts to repair the threads, when installing the tools supplied will countersink the hole for you and the insert will sit flush with the barrel deck. I wont use helicoils anymore they are only marginaly stronger than the original threads cut into the alloy barrel, I have found the time serts to be a much stronger option. they also have the ability to be removed with a ezy out, pull it out and reinstall a new one, 2 minutes good as gold..try that with a helicoil..
Weirdo....
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Hey Weird,
Just wanted to be certain I understood your point, thanks for the reply.
I'll have a go with the time certs next time the need arises.
Tuck\o/
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I've pulled helicoils out many times. I don't advise it but if a helicoil gets "cross threaded" trying to install the insert you have no choice. Pry up the first top thread wire, then grab the wire with vice grips, and yank the wire right out.
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Well... The verdict is in.
Whoever did the top end either used the old wrist pin circlip or didn't install the new one correctly. Yep, chewed the crap out of piston, cylinder and head. Some people should never pick up a wrench. I'm choked. It has an 86mm piston and I'm not sure 87mm will do the job. The gouges are ugly. I'd attach a pic but can't with my phone on here.
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(http://i7.photobucket.com/albums/y282/CamoKVF700/9a2f4f0e.jpg)
(http://i7.photobucket.com/albums/y282/CamoKVF700/05af3703.jpg)
(http://i7.photobucket.com/albums/y282/CamoKVF700/79616474.jpg)
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That sucks bad. By the looks of it they just didn't install the clip properly. I always make sure the clip opening is at the top once installed in the groove.
That cylinder's gonna take some major work. The gouges on the lower port look pretty d**n deep. May have to do a big bore kit.
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what a sad sad day
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looks like its been sleeved to me, if not then it might be the only option you may have. mine is a 2000 and i have 2 barrels one sleeved and the other nikasil, have treid both and i couldn't tell the difference between them with the seat of my pants.
Weirdo...
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I'm sorry for your experience. You always wish your new bike purchase in a positive one. Suck it up learn a valuable lesson, MANY sellers are friggin idiot liars ! I got screwed royally when I bought a used '84 KX125, the frame was cracked, and the crank was BENT ! But the seller assured me the bike was in "mint" condition !! :x
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The shop tells me they can save it with an 88mm bore. It's sleeved already so one last size on this one. They are also going to clean up the head.
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Sorry to hear about your engine.
But the transformation you did on the bike looks great. The white accents really helps make it look different, but no doubt it is a Kawi.
Hope you get it up and running and roosting soon.