Maintenance & Technical > KX500 Original
1992 KX500 Build
sandblaster:
--- Quote from: Rosset racing on August 13, 2017, 05:57:01 PM ---Sandblaster I tried to send you a pm don't mean to jump in to your thread I'm new here but have been riding and working on 92 kx5 for 14 years. I just had a question about the kx5 center piston window mod from someone who has road with oneach first hand. Did the mod help you bike? Thx
--- End quote ---
Hello.
Yep, I got the PM late last night but didn't respond because I was beat.
I have rode both pistons.
It is highly unlikely that you can feel a difference.
The biggest reason for the mod was cooling.
Stewart (The last speed record holder) developed this mod for the KX500 to decrease temps around the crown of the piston at sustained high speed WOT runs.
It does not make any HP but it will help keep the HP at it's peak longer.
There are other potential benefits such as better lubrication of the wrist pin ect.
So, should you window your piston?
Mmmm... for most it isn't required but it's not going to hurt a thing if you do but don't really need it.
On my next build I will be putting some holes in that area, but not a big hole :lol:
MMVTwin:
--- Quote from: sandblaster on August 14, 2017, 03:09:14 AM ---Hey Captain :lol:
That broken part is for the kick start return spring.
Have it welded.
But before you do anything get a piece of coat hanger or heavy wire that fits the hole.
Stick the wire in the hole.
That way when it is tig welded you don't deform the hole size or plug it up :-o
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Rodger that
Rosset racing:
Thx blaster i really appreciate the response and info! Can't wait too ride the old girl again it's been too long. Looks like you got a lot going on with your own bike ill leave u too it.
sandblaster:
--- Quote from: Rosset racing on August 14, 2017, 03:20:26 PM ---Thx blaster i really appreciate the response and info! Can't wait too ride the old girl again it's been too long. Looks like you got a lot going on with your own bike ill leave u too it.
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Bikes or no bikes.... I always have a lot going on Lol 8-)
Motorrad:
Sad. I couldn't remember what that hole was for. Im losing it.
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