Maintenance & Technical > KX500 Original
MONUMENT TO THE 2-STROKE 2000 KX500
flyingfitz:
I have the VForce 2, no spacer and mine runs great on or off the trail. Plenty of bottom end and smooth transition. I would try the VForce mod and see if you need the spacer before you buy it.
I also woods ride the stock pwk 39. Jetted right it is very consistent and runs clean all the way through. Very predictable with stock throttle cam. No plug fouling, even with the cheapest b8es plugs. 93 pump gas, Bel Ray H1R, no ping.
The compression release is the bomb. I dont have the head cut mod. Starts easily 1st or second kick.
I think the window piston is a worthwhile mod. I also think having the crank trued by someone who has the equipment and experience will make a big difference. My bike runs very smooth. No disappearing bolts. No broken pipe mounts. No tingling fingers, even with 7/8 bars.
You might consider putting your money into the core and then modify the periphials (sp?) if you need more. You will save bucks for all the fuel these things burn! My 2 cents.
Fitz
flyingfitz:
I would also try the stock flywheel before you add a weight.
Fitz
delphipro5:
SO as I have said, 91 oct. fuel is all that is available from the pumps in my area so I do not wan't to mod this engine for race gas.
Where can you get race gas? like the belray H1R mentioned? 91 is a little low, any suggestions on how I can spice it up a little?
What about octane boost like lucas oil has for cars?
Just got my v-force2 kit today. When I put this back together I will try without the spacer first.
I have ridden it all last season with the stock flywheel, interested to see how it feels with a weight.
Keeping the stock 39 PWK, but I might have it modded slightly/jetted correctly.
NEED TO FIND: Local shop that can do the Bottom end/ crank balance. ( need to send out cylinder for plateing too)
I keep my post on the engine updated so you may see the list grow and change.
ALSO, What makes this bikes suspension so archaich? it's got a linkage shock(some KTM's still don't)?
and are the forks really that much different to now?(aside from the sff models)
WHY can't you just buy a brand new shock and forks 2010 tech, in the same sizes as the stocks and replace them?(trust me I know the cost involved with doing something like that!), BUT I have not even seen it as an option, i'm just saying......... I mean, that is basically the idea behind the AF and SF mod's is to update the erginomics and suspension but keep the power.
I'm just asking what makes this suspension so outdated?
No I am not going magura anymore.
let's see anything else.-nope
delphipro5:
SO.... Anyone want to fill me in on where I should have the bottom end work, crank balancing, and cylinder plateing done?? Need a good shop to do these things. I should have the engine out soon, any takers??
snoopjonnyjon:
You can buy VP fuel from most race shops, but it is expensive. Last year when I was burning VP I frequently burned through $100 or more in a day of riding. This year I switched to just running 100LL av gas. I have no idea how the availability would be in your area, but if you have a pilot buddy, it might be an option.
Here is an octane booster that actually sounds very promising:
http://torcoracefuel.net/pro-accelerator.html
Most of the typical service station octane boosts don't do much. I've never tried the Torco Accelerator but have read some independent reviews that say it really does work. Just don't mix it with the fuel ahead of time. It has an extremely short life when mixed. Only mix up what you will burn that day. Apparently after as little as 24hrs, the higher octane component has evaporated out and you are back to the same octane you started with.
Belray H1R is a two stroke oil, not a fuel. It will be available from every motorcycle shop.
And just in case you didn't come across it in your searches, here is my rebuild from last winter. I did a lot of the things you are looking to do.
I didn't do anything to the suspension other than new fluid and fork seals. I didn't consider myself to ride at a high enough level really benefit from big suspension mods. I thought it would just be wasted on me with my ability. But then I bought a Gasgas with Ohlins at both ends, and wow... I can't believe how plush and nice handling that bike is. If I had money to burn, I would try to get a set of Ohlins forks and shock for my KX.
http://www.kxriders.com/forums/index.php/topic,7066.0.html
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