General > Introductions

Hello to all, old Kaw racer, new to KX 500 though

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jfabmotorsports.com:
I would start out with one Fogger and start low like you said. I would run a 20/24 or 24/28 with 6psi to start. Read the plug and look at the top of the piston offen. If you  are NOS savy you already know this, if not you are about to find out! If I were going to spray a KX500 I would use a ported piston, Vforce reeds, b9?? plug and I would start with as close to stock compression ratio as I could while still cleaning up the head. I think if you get to carried away with the NOS or compression you will never keep it lit or in one piece.

don46:
I'm using the boondocker system on my 500 (dry system), I have shot as much as 20hp but usually only run 15hp shot. the plating will suffer from the nitrous, in my experience the stock plating will flake off the exhaust port area, I ended up sleeving that cylinder to get it to live. typically mine runs no more than 15-20 secs, how big a bottle are you planning to run to go for a minute?
I do have a 650 twin with a cold fusion wet system, I'm shooting 25hp total, I do believe the wet system makes more hp, or at least it feels like it. Jfab reccommends the v force reeds, that is one thing I most defineately would NOT do, they will last maybe one run (at a minute) and totally disintegrate, when I pulled my brand new reed cage there was only one petal left, I went with boysen reeds and have had great success. I do use the vforce on my gas bike and have had great success, so I don't know if there is a reaction to the nitrous or what the story was but I wasn't willing to risk another failure.

DocsDirtbike01:
Thanks for the info guys. So the Vforce reeds come apart or disintegrate? Good to know, Guess I wont be getting those. I have looked at those and the boyesen's. Now tell me what you think of this, for the wet kit, what if I sprayed alcohol into the wet system with race gas. I know it keeps the charge temp down and wouldnt be too entirely complex to add a tank and small pump. Just a thought.
When the vforce reeds came apart, was there anything left? Was it in the cylinder? Did it end up in the pipe? Im just curious.
I think one fogger would be adequate. One would work with the single cylinder fine.
jfab PM me when you got some time, Id like to find out about some of your services and set up a time to chat.
Thanks for all the input guys. Its informative and appreciated.
doc

don46:
Can you run straight alcohol or is it against the rules? On some of the diesel pickups they inject windshield washer fluid to keep exhaust temps down, so it would probably work, just not sure how well.

the vforce petals were totals gone, not to be found in the cylinder or pipe, the one petal that was left looked like it was ripped apart, this happened at full song, I heard the motor pitch change and when he came back it was running like crap. It had brand new reeds so that couldn't be the problem right, wrong.

One nozzle will work fine, you can get all the horsepower you can handle, plus the wet system is very bottle pressure critical. A bigger bottle would be best case at maintaining the pressure. on the cold fusion about 1100 psi is perfect, once the pressure drops it goes rich. The boodocker system isn't as bottle pressure critical as the richness is based on bottle pressue and changes with bottle pressure, and it has only one solenoid.

How are you going to activate the system? on the 500 I modified a throttle by adding a micro switch, on my 650 and 450 I use the throttel position switch in the carb.

DocsDirtbike01:
Washer fluid is what I have seen in the past with big turbos and superchargers. I think it would work fine for this instance, but so would race fuel.
Who makes a good gasket set for these, i have seen some like cometic or Kaw, whos a good supplier for the total engine gasket set?
Does anyone currently make an all copper head gasket? Same thickness as stock, I dont want to up compression too much if at all. Good power seems to lie in the top end of two strokes, is it pretty standard to sleeve these motors. i have read of a few on here, do they run well? Are there any problems associated with sleeving these? I want to run stock bore for at least a season and see how it fares. It will take some time to figure out the equation, the fun lies in trying all sorts of combos.
If I can build it to be 500 cc's good compression, good shaped head and running well, I think the power to weight ratio is a good overall choice with these KX 500's.
Can anyone post some dyno charts of power they have made with standard bore? Id like to see some numbers from some of the bigger bore bikes as well.
Thanks for all your info. This is a great resource.
ry

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