KX Riders
Maintenance & Technical => KX500 Original => Topic started by: Rougedante on August 30, 2014, 01:52:25 PM
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Does anyone know where to get a bottom end for these bikes. I have the chance to get one and id really like to have it but cant find aftermarker crank only oem...and its like 600bucks. Kinda crazy. Am I missing something. Also how often do you have to rebuild them new to kx. Thank you in advance
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Welcome to the site! Fun is never cheap!! Personally I think OEM Cranks are the way to go. Kawasaki makes a d**n tuff crank spend a few more bucks get it balanced and you wwon't be ddisappointed. I have a 94 And just got its first top to bottom freshening up and the whole bottom end and tranny was all in spec! All new bearings and sealsand piston and rings and she was all good. With good routine mmaintenance kx500 are very dependable!! Now go get it and post some pics
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I would rebuild the crank with a Wossner rod kit, have it welded, balanced, and trued.
Cheaper then OEM and really tough...
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Yea I know it aint cheap ive got a 00cr250 I just rebuilt ground up (engine wise) last winter. I want the bike for a mini buggy ive got. Kinroad 250...its my uncle but he hasnt ridden in over a year. Prob pull the engine and sell the rest of the bike...
As for rebuilding the crank how do I do tht. And do I have it rebuilt and then welded and trued? Also Would I just need complete bearing and seals kit and get the rod to complete the bottom end? I just dont want to buy the engine just to not be able to afford to rebuild it when needed. How long do these engines last. Somone told me they blow through cranks because the bore is too big...any opinions advice facts are welcome. Thank you guys
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I would rebuild the crank with a Wossner rod kit, have it welded, balanced, and trued.
Cheaper then OEM and really tough...
my next motor/build is gonna be with a Wossner rod kit.
Also how often do you have to rebuild them new to kx. Thank you in advance
Welcome to the site Rougedante....
providing you keep on top of your general maintenance and always run quality 2 stroke oil, you should get a few years between rebuilds with ease. One of the old gurus on here claims he got 11 years out his original motor before taking it apart for the 1st time.
"EDIT"...I was wrong...it was 12 years... :mrgreen:
http://www.kxriders.com/forums/index.php/topic,1530.0.html
http://www.kxriders.com/forums/index.php/topic,1347.0.html
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I run klotzr50 in my cr250 is that good stuff. And i
The motor would be in a little buggy maybe 800lbs tops including the engine. Would tht kill it faster or anything. I dont want to buy the bike and have to constantly rebuild the motor once its in and spend crazy amounts of money on rebuilding it. If I did a wossner rod and all tht how much do you think id be looking at for parts for bottom end only?
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I've never used Klotz, so I don't know if it's good or bad.
providing you won't have to replace any tranny parts, you'll probably be around $800-$1K to rebuild the bottom.
On how often you'll need to rebuild it, it all depends on how hard you run it....and as I stated earlier, keep on top of your maintenance..i.e....keep a clean air filter on it always, and change the oil a lot!
have a look at this thread...is this anything similar to what you're thinking of doing?
http://www.kxriders.com/forums/index.php/topic,12529.0.html
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Dang thats a pretty penny to rebuild the bottom end. I always clean my air filter and oil so no worries on that end. Umm ehhh on tht thread this is more what I want to put it in. http://m.youtube.com/watch?v=FFQo8vWm5I8
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if you just replace the bearings and seals, you could do it for 1/2 that price...I tend to replace as much as I can, or need to.
800lbs, that thing weighs that much??...
the 500 motor should be able to push that thing around...won't really know how well until you try it.
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It says 800 but I dont believe it. I can pick it up so im assuming 500lbs total. Its got a tiny 250cc honda clone nd it goes up to 40 but real slow no real power to it. So if I replaced seals bearings and rod assuming the cranks good prob 400-500? You think
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yeah that should be about right...
how do you plan on cooling it?...not sure how much you've snooped around on here, but these motors run hot!...so be sure you come up with a good plan if you're gonna be running it in the dunes WOT a lot.
you might benefit from reading this thread over a bit...
http://www.kxriders.com/forums/index.php/topic,11480.0.html
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Thats alot of reading lol. Busy right now so ill deff read it later but I figured run a car radiator up top like the buggy has now so the air blows thru it by itself and also get a electric fan off summit and put it on their. Should provide enough cooling power...and if not get a bigger radiator or run two tht form a v facing the front with two big cc fans on them...
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yeah it is a lot to read at once...
sounds like you've got a pretty good grasp on it though...
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I went through 3 years of auto tech at our local highschool. We actually have the best program in northern nv. Rebuilt engine and trannies my senior year so I do have a basic idea how engines work lol and how to rig them to work in toys haha. Just need to find the right one thts worth it....
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cool....post plenty of pics when you get things rolling.
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Will do. Thanks for all the help
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Do you have to post the pictures online somewhere first to post them on here or can you just paste them some how
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Do you have to post the pictures online somewhere first to post them on here or can you just paste them some how
here ya go...
http://www.kxriders.com/forums/index.php/topic,10040.0.html
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Heres a link to another post with the pictures.
http://buggynews.com/kinroad-250-to-kx500-t46431.html
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(http://buggynews.com/resources/image/thumb/x63070.pagespeed.ic.cf2K1ocS4D.jpg)
(http://buggynews.com/resources/image/thumb/x63071.pagespeed.ic.ucp9dJ79--.jpg)
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That works. Thank you very much. Whats the letters on the cyl mean? Is tht stock or aftermarket
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That works. Thank you very much. Whats the letters on the cyl mean? Is tht stock or aftermarket
Kawasaki Integrated power valve system
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Is this year good then any main steam issues I need to fix before I swap the engine over
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I run kloz r50 in my cr250 anyone run this in a kx500
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I run kloz r50 in my cr250 anyone run this in a kx500
I do. Been running R50 for the past 12 years, excellent lube, just purchased another gallon last week.
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The 89-04 engines are all basically the same with only some minor differences.
So, when rebuilding your engine, look at all the engine building threads to get a idea of what all to look for.
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Ok will do. I rode the bike briefly sunday when a hose started leaking tranny fluid. Is tht a vent hose or over flow? Did u just put too much atf in or?
And what are some quick easy mods. The bike is going to be ported and new reeds. I read something about reed spacers and pipe spacers. What do those do
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You need to consider what you will be doing with the bike to determine which mods will suit you best.
Reeds, Pipe, Jetting, reed spacer, and muffler packing, are fairly quick and easy.
Most of the rest of the mods start requiring increasing amounts of time and money.
Besides installing all new bearings and seals, a new top end is always welcome as well as Larry's Decompression and head squish mods.
Cleaning up your bridges, transfers, and ports is a welcome addition as well.
Balancing your crank is also a must.
But, it all costs money and time.
I don't know where it originated but on Mad Max there was a sign at a wrecking yard that read "Speed is just a question of money... how fast can you go?"
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"Speed is just a question of money... how fast can you go?"
Correction...
"Speed's just a question of money...how fast you wanna go?
I've known that movie word for word for 30 years....that movie is what got me to buy my KZ, and lay down 100ft strips all over town :-D
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Right now it's got a gnarly pipe not sure of the reeds and such. Ill start thr tear down today to get the engine out and apart to send the cyl off and order new top end and reeds...not sure of the reeds I want. It will be in a kart weighting 6-700 with rider of about 200lbs. And of course rejet once its back together to incorporate the porting
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Ran into a small problem. I wont have any way to charge a battery to run lights or my electric fan idea to keep it cool....any ideas other then just getting a big battery and charging it before I go out lol
Update so far.
http://buggynews.com/kinroad-250-to-kx500-t46431-20.html
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HAHHAAHAHAHA, do i have any ideas :evil: :evil: :evil:
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Fire away.
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MZB
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Mzb?
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http://www.kxriders.com/forums/index.php/topic,8234.0.html (http://www.kxriders.com/forums/index.php/topic,8234.0.html)
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Thanks guys. Ill look into that....
So on the problems on hand. Reeds. I want mid to top end reeds for the k5 any opinions on the best ones. Also should I go just pedals or full cage and pedals? Mostly gonna be used for sandy trail desert riding. Some dunes but I will change gearing when I go there
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Also need a new intake boot. Its not gonna last much longer. Best to look on ebay or is there a site to buy new ones
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For the reeds.... I have a idea :-D
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At least ur replying I appreciate that ppl are watching waiting to help when they can!
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Don't know anything about them but they have a new boot for 45.44 plus shipping.
http://www.2wheelpros.com/oem-parts/kawasaki-holder-carburetor-16065-1180-part.html (http://www.2wheelpros.com/oem-parts/kawasaki-holder-carburetor-16065-1180-part.html)
On the reed I would use a V-Force 2 but I'm prejudiced...
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Thats cheap! U sure thts the whole intake boot and why are you prejudice
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Because I'm about the only one who can sell you a V-Force 2 for the kx500 :mrgreen:
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Haha why is that? I see them on ebay I think...in your professional opinion does it help with top end alot
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If you look on eBay there is only one VF2 for sale and it's more expensive then buying direct from me.
You'll find the VF3s by the dozen but you won't get the top end response from them that you will from the VF2.
Everything adds up when you are trying to get more top end.
You need a fresh motor, pipe, reed, and correctly jetted carb just for a start.
If you want to get the most from the VF2 read this over
http://www.oem-cycle.com/forum/viewtopic.php?f=5&t=484 (http://www.oem-cycle.com/forum/viewtopic.php?f=5&t=484)
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Alot of reading deff need to read that a few times. So far im understanding that id need to trim off the ears and something about the tensioner
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One more thing whats a good reed spacer? All im finding is moose online
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I know more reading haha but have u read this one
http://www.kxriders.com/forums/index.php?topic=1737.0
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I dont mind reading. Its good information
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yeah I learn lots here from reading I wouldnt have got anywhere without KXRiders :-D
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Its awesome!
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So far im understanding that id need to trim off the ears and something about the tensioner
That's a start.
VF2's have a low tension setting for lower end torque and a high tension setting for better mid to top end.
Then you can modify the boot further to gain a bit more even flow.
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Any videos on this? I will be sending the bike off to be ported so more flow is good dont want anything hindering it
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None that I'm aware of, just the info I posted the link to.
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Wanna pm me the price of a vf2 reed set up
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Trimming the ears.. is tht only or clearance issues or does tht improve performance over stock cage
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Blaster you also mentioned larry doing a decompression mod. How exactly does tht work. Is he the only one who does it can you buy a kit to do it urself or a local shop to install it
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Blaster you also mentioned larry doing a decompression mod. How exactly does tht work. Is he the only one who does it can you buy a kit to do it urself or a local shop to install it
this should explain it quite nicely for ya....
http://www.kxriders.com/forums/index.php/topic,6445.0.html
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I did read tht post right before I posted lol. Im just curious if you can buy a vavle like tht and have a machine shop do it locally?
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you could, but with Larry, you'll get the head/squish reshaped too :-D
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Whats tht do exactly and thts included on his 150 price
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it gets rid of the s**tty stock squish design, allowing it to run more efficiently, and on pump fuel.
I don't believe it's included in the price....but it's more than worth it!
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Are there any pictures of the redesigned squish? And when you say allows it to run on pump gas you mean like it runs better no pinging nd such or?
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And when you say allows it to run on pump gas you mean like it runs better no pinging nd such or?
correct
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Would turning the head on a lathe and taking off a tiny bit of material in the chamber do the same thing or is there a certain way to do it without losing compression
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Know where to buy a valve kit at to have a local machine shop do it
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http://buggynews.com/post453141.html#p453141
Pictures of the cyl...
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Cylinder looks sleeved and I believe I have the vf2 reeds already. Pictures further down the page on tht link
(http://buggynews.com/resources/image/thumb/63512)
(http://buggynews.com/resources/image/thumb/63526)
(http://buggynews.com/resources/image/thumb/63525)
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Know where to buy a valve kit at to have a local machine shop do it
I am sure you could accomplish the same thing Larry's doing but I'm not sure how much cheaper you could get it done and I must say that his welding is on another level. You can't tell the valve isn't stock.
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I did contact him. I decided to go with him. My cylinder is sleeved so I can just get it bored over to the next size piston. And I already have vf2 reeds.
So I guess ill have larry do his mods get it ported and bored to the next size and call it all good and put it back together
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Got the piston out. The rod has 302 Stamped on it and it is rusty brown in color any way to tell what type of rod this is?
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Looking for gasket and piston kits. Seeing alot that say they fit 91 and up or 89 and older. Shouldnt any fit the 90 year engine? Id like to get a wiseco full kit including piston and gaskets.
Bore is stock size right now but will need to bore light scuffs out hoping .5mm will be enough....any helps with the topend kits part number or info if newer kits will fit thank you