Author Topic: what mod for power ?  (Read 5347 times)

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jpinhb

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what mod for power ?
« on: March 11, 2006, 05:16:51 PM »
I am a new guy here and I am looking to get some more power out of my 500 , It already has a Procircuit Platnium pipe and silencer  ( (and\or a FMF spark arrestor ) the motor has a recent complete rebuild , I opted for a non plated cylinder so I could bore it if need be . But I want to start tweeking it for more juice . I do alot of desert riding and I am always looking for more speed and power , I think my 500 turned me into a power junky !!!!!! There is nothing like the power of a KX500 !
Anyway your suggestions to get me started on mod's will be greatly appreciated !!!!!!!! Thanks guys .

Offline gowen

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Re: what mod for power ?
« Reply #1 on: March 11, 2006, 06:06:01 PM »
I replied to your question in the Introduction post. But, here goes. What power do you favor? Desert... I'm assuming Top-end power? Explosion? Torque?

There are alot of different options you can choose. But, start with the type of power you like.

jpinhb

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Re: what mod for power ?
« Reply #2 on: March 12, 2006, 11:24:23 AM »
Hey Gowen ,, I would have to say top end power ! I love to out run all my friends on thier 450's in the desert .
I also love to hill climb though .

Offline Timbowe

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Re: what mod for power ?
« Reply #3 on: March 12, 2006, 03:13:55 PM »
PVL ignition? Big top end rush. www.pentonimports.com  :evil:
KX500
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jpinhb

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Re: what mod for power ?
« Reply #4 on: March 12, 2006, 04:10:51 PM »
Thanks timbowe ,
Hey Gowen I see your bike is setup for hillclimbing , very cool , but what gearing are you running ?
I am going to order a sprocket-chain set this week and haven't decided what to get yet . I love fast desert riding but also hillclimbing .

Offline alan

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Re: what mod for power ?
« Reply #5 on: March 12, 2006, 11:29:49 PM »
Reed Spacer!Reed Spacer!Reed Spacer!Reed Spacer!Reed Spacer!Reed Spacer!Reed Spacer!Reed Spacer!Reed Spacer!Reed Spacer!Reed Spacer!Reed Spacer!Reed Spacer!Reed Spacer!Reed Spacer!Reed Spacer!Reed Spacer!Reed Spacer!Reed Spacer!Reed Spacer!Reed Spacer!Reed Spacer!Reed Spacer!Reed Spacer! :-D :-D :-) :-) 8-) 8-) 8-) :lol: :lol: :lol:

CHEAP POWER! :-D
Sand - Dirt - Dunes = Fun
       04- 700V - 01- KX500
        08 TeryX 2012 KX450F

Offline gowen

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Re: what mod for power ?
« Reply #6 on: March 13, 2006, 05:55:42 AM »
Top-end power... Wow! Where to start. I guess with how deep your pockets are? :-)

A Rad Valve (Boyesen) is a great start to help curve the powerband into the top-end range. Also, FMF's Desert Pipe helped alot. Slightly retarding the ignition also helps, but be VERY careful in that regard as you can seriously hurt the engine. Those are in the $100-$200 range.

Also, again, your jetting is the cheapest way. I was also at a 168+ jet. But, if your pilot jet (low throttle range) is rich and your needle is rich, your top-end is going to be seriously weak. Start from the pilot (No throttle-1/4th throttle range) and find an idle and move up the jetting chain. Three MAIN parts of the carb in jetting is the pilot/needle (& clip)/main jet. Check out the jetting thread. It's long, but will go in depth on jetting.. Maybe skip to the end and read backwards, because the beginning is just us trying to figure out the issue I was having a few years ago.

OK, on to the real top-end stuff:

Bigbore - Make sure you port for top-end, or else the more displacement the more low-end you usally achive.
Porting - Usally comes with a bigbore. Make sure you want mid-top range.
Headwork - Cut for lower compression to give more topend range.
Crankwork for high RPMS (balance the crank so it doesn't fall apart).
PVL Ignition system.. Expensive but you will NEVER go back, it is crazy top-end power.

If you are serious about engine work, check out Ericgorr.com he $500 and you can get a 520kit, any port you desire, that includes plating, your choice of headwork, and a piston kit. Then it is like $150 for a hot-rod kit including your crank balancing.

Gearing: you will be fine stock. I'm 14/46 and happy with a 19in. tire right now.

jpinhb

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Re: what mod for power ?
« Reply #7 on: March 13, 2006, 05:29:26 PM »
Well thanks for all the info guy's . I am adding all this info and web sites to my favorites folder for easy access . I have already spent too much this week to consider a big bore kit , also my motor has a recent rebuild , but I am going to price a RAD VALVE or a v-force delta 2 reed setup tomorrow .
I just ordered new fenders , chain and sprocket kit , air filter , wheel bearing kits , clutch kit , carb vent kit , and last week I got a new IMS 3.7 tank . I am also going to price the ignition system that timbowe and gowen mentioned .

Offline gowen

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Re: what mod for power ?
« Reply #8 on: March 13, 2006, 05:42:54 PM »
http://www.pro-flo.com/proflo_pvl_ignitions.htm

Best price by far! I believe I paid in the mid-high $400's and got a deal then. They've come down on price. It is an entire system, which consists of a inner rotating rotor, stator plate and all, coil and CDI. Awesome product, by far.. and I mean FAR!! is the best source for explosive top-end.

Also, the RAD is better than the Delta if you want all top-end. The V-Force is great for improving low-mid range. The Rad moves the curve to the top.  :mrgreen: Check E-bay, I've seen them run in the hi $70's to low $50s.

jpinhb

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Re: what mod for power ?
« Reply #9 on: March 13, 2006, 06:02:20 PM »
Hey gowen ,, thanks for the link .
My buddy gets me a deal so I 'll have him price me the rad valve tomorrow and thanks for the headsup on the v-force .

Offline Timbowe

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Re: what mod for power ?
« Reply #10 on: March 14, 2006, 10:54:33 AM »
Does the Pv ignition have any negitave effect on the bottom/ mid range torque. Or does it still make reasonable power in the lower end then get the top singing as well?
KX500
Weapon in the hands of the Master

Offline gowen

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Re: what mod for power ?
« Reply #11 on: March 15, 2006, 12:19:07 AM »
Yes and no. Yes, being that the SUPER light flywheel causes the reduces the enertia to ZERO, so naturally some torque is gone to hell. No, being that the power is so strong and explosive that you don't even notice the low-mid range, because it jumps to the top instantly (no traction, no matter the tire size or knobbies). If you are on the tarmac, you will notice a drop in low-range power, but once to the mid and top-end.. if you are not burning your poor tires to liquid.. you are doing some serious no hassle (1/4 throttle) wheelies... ah, I need to ride.

Offline Timbowe

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Re: what mod for power ?
« Reply #12 on: March 15, 2006, 10:43:54 AM »
OOooo sounds tempting. My ever increasing search for the ridiculous power could be satisfied. (for a time).  What the cost?
KX500
Weapon in the hands of the Master

jpinhb

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Re: what mod for power ?
« Reply #13 on: March 15, 2006, 03:46:15 PM »
All this talk of wheelies , tire spinning , knobbies ect is making me wanna ride dangit !!!!!!!!!!!!!!!!

Offline gowen

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Re: what mod for power ?
« Reply #14 on: March 16, 2006, 12:47:28 AM »
**Pro-Flo has the best prices**--

PA103 KX 500 (Rotor is Lighter Than Stock: Bike will be Explosive) (97mm from Center of Holes) $374.95