KX Riders
General => Introductions => Topic started by: scottysg on October 26, 2015, 02:00:49 PM
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Hello all! My name is Scott and I just bought a 1988 KX500 motor to put in my CA street legal yz250.
I have a 2002 yz250 which is setup motard style. I use it to go to work about half the time, and it is severely underpowered for street use blasting down PCH like a hummingbird. With 14f 40r gearing(required to go 65 for extended time), it doesn't have the torque to lift the front very easily. lame almost as bad as a CBR250. Ive read a lot of 500 motard posts explaining that the front will not stay down. Im 6', 155lbs and i sure hope they're right, for what i have into this bike. I chose the kx motor because it has a power valve, something i am relatively new to (in my yz), which should help me make lots of power and be able to control it semi decently. I grew up living and breathing banshees, so I LOVE a lightswitch power band, don't get me wrong, but i think this is the right choice for the street. When I get used to the 500, you'll see me looking at power adders like nitrous or more likely a turbo to bring the poop in the pants level up. Did that to my mustang and WOW no looking back. once i sort out the electricals of how to run an oil pump and all my lights...watch out!
If anyone has a decent rolling chassis ready to take my yz250 motor, hit me up! That motor works awesome off-road so i plan to throw the yz250 motor in a frame and make that my off-road bike, and keep the yzx500 for street use. We'll see if i can keep up with my buddy's triumph daytona now! Any tips, advise, or knowledge is very much appreciated as I am totally new to KX's.
I will make a thread and post pics once parts start arriving!
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Have you considered just putting the K5 motor in a newer AF frame and leave the YZ as is?
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Where in Cali are you
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Nevermind I just traced your IP... Your few hours north of me...
Here is mine BTW.... Very not stock.. 550cc
(http://i13.photobucket.com/albums/a289/Motorrad/IMG_0137.jpg)
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If it doesn't involve trade secrets and non-disclosure agreements, what pipe is that Motorrad? :-D
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This should be a good one. Another steel frame that handles good. A YZ250 frame may be a great place for my extra motor. Can't wait to see how easy or hard the engine fits.
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If it doesn't involve trade secrets and non-disclosure agreements, what pipe is that Motorrad? :-D
Zip-ty. Fmf desert gnarly.. I got the last one made..... Have to find them used now
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Have you considered just putting the K5 motor in a newer AF frame and leave the YZ as is?
I considered this, as it would allow me to have 2 complete bikes ready to rip! take a friend, teach the gf maybe! It is the best solution I agree with you, except for one thing- my yz250 is street legal in california, a rarity. And id like to have the 500 power in my street legal frame since its on the street not really offroad that the 250 feels underpowered. I have heard people say the yz isnt the best geometry, so an af is best, but heck I have a lot to learn before I can use it for all its worth.
Where in Cali are you
I live in huntington beach, how about you motorrad? your bike looks incredible, thanks for sharing that photo with us. I will be creeping on your posts to find out all about it! That pipe looks great, am I correct in assuming that it is designed for high speed, mid/high rpm cruising, with less focus on low rpm torque? Sounds right up my alley. I don't have a pipe for the 500 yet and it is one of those "what am I going to do" questions I haven't yet answered. Im open to suggestions! Ive read that most 500 pipes arent 'fat' enough, so I was thinking of getting a cheap oem unit off ebay, cutting it up and welding in a fatter midsection, then altering the back side to line up with the factory silencer location. I own a welder and have skills 'good enough' to use it, so it would only cost me my time. Any input with regards to this issue is appreciated.
This should be a good one. Another steel frame that handles good. A YZ250 frame may be a great place for my extra motor. Can't wait to see how easy or hard the engine fits.
Im hoping its a pretty easy fit as well, cant wait to get the motor and find out. Tracking says its in utah! Im not so concerned about the frame, it has a nice split in the 'front downtube' (please correct if it has a more accurate name) for the exhaust to come out of the cylinder. I will need to drill the swingarm bolt to the yz's 17mm which I am also not worried about, and then see if I have to remove material/shim it to align the sprockets. Im a little OCD about that so I hope I get happy with the results. I have a 3.2 gallon acerbis tank that goes so low, it hardly lets me reach the choke (good thing my bike doesnt need it to start) and it surrounds the cylinder pretty tightly. I hope that I will still be able to use it, as Ive heard these 500's really go through gas!
One question I had is with this larger motor, will it be very beneficial to put in a hydraulic clutch? I dont have weak fingers, but its not that pricey.
But first, I need new bars and a visit to the chiropractor after last weekends camping trip to Slash X cafe near barstow. No more night time mobbing until I get a brighter headlight :wink:
Happy riding everyone, dont eat too much candy today!
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If it doesn't involve trade secrets and non-disclosure agreements, what pipe is that Motorrad? :-D
It seems to be heading a bit that way :-D
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Also, Im trying to share pictures here and also update my profile with a pic, but I cannot seem to figure it out, or see any guidance in the help section or search function. As soon as I figure it out, pictures will come!
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Here's a handy guide for posting pics using photobucket:
http://www.kxriders.com/forums/index.php/topic,10040.0.html (http://www.kxriders.com/forums/index.php/topic,10040.0.html)
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Check out mikectanker's thread 2001 rm250/ 1994 kx500 sf conversion. He had issues with his tank if I recall. Yours will definitely be tight!!
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Banned cr500 riders. Com has some tank molding threads. Research the cost of the tanks new and used. I used a harbor freight heat gun. Some guys use hot water but I couldn't make the hot water trick work on my suzuki tank.
Heat and use some thing to push on the tank when it gets flexible. I used a big socket and extension to push but something more ball shaped would be better.
You must hold the hot area while hitting it with cold water. You will need to heat mold and reheat several times. I spent 4-5 hours doing this.
Keep the petcock on the tank. get someone to help you hold things if you can. I did mine by myself and it was a *b**ch.
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Thanks Umberto for the photo bucket link!
I checked out mikectanker's thread on the tank 'modification', I think Im ready to go now. Thanks for your posting all that info :)
Sounds like Im buying pizza and beer for my friends to help me!
Engine arrived yesterday!
http://i1379.photobucket.com/albums/ah149/scotty-sg/photo%203_zpsqa7dmepi.jpg
Didn't come with black box or ignition coil. or kick starter :| meh what to do, Im considering an ecotrons efi kit for the efi advantages and if i understand it correctly, it will function as my spark signal so Ill just need to buy a cheap coil. All the CDI's i can find are like 160 holy moly! Still doing research on a solution for this, will keep updated. I think I need to move this to a new thread in a new location too. I will post a link shortly to what will be the YZX500 build, see there for photos and updates!
(http://i1379.photobucket.com/albums/ah149/scotty-sg/photo%203_zpsqa7dmepi.jpg)
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(http://i1379.photobucket.com/albums/ah149/scotty-sg/IMG_0964_zps5prlcloh.jpg)
Lol!
Ok, to finish posting a specific pic go to where your pics are...
Take a look on the right side of the screen.
See where it says :Direct"
Click the link to the right of it.
You will see "Copied" flash up really quick.
Then come on the site and click the "Insert Image" icon just above the smiley face, and post the link.
(http://i1379.photobucket.com/albums/ah149/scotty-sg/photo%203_zpsqa7dmepi.jpg)
Click save and your good to go
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Thank you sandblaster and umberto for the help posting the pictures! I think Im all onboard now. Here's a link to the build thread:
http://www.kxriders.com/forums/index.php/topic,15760.msg121601.html#msg121601
See you all there! :mrgreen:
(http://i1379.photobucket.com/albums/ah149/scotty-sg/photo%202_zpswa9hwcmg.jpg)