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Project Clapped out 1998 KX250... what works?

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DoldGuy:
Going back together as it was with just the crank or.....?

sandblaster:
We are going to put in some new bearings there but everything else will be the same.
The plan is to make several changes over time and dyno each mod.
I'm tired of butt dyno results  :-o

sandblaster:
I'm also doing a KX500 but the approach will be a bit different as far as the order of the mods.

Heniz:

--- Quote from: sandblaster on March 17, 2018, 04:10:31 PM ---Just in from Steve.....



--- End quote ---

Any credit to the turbo crank mod? ive been reading a lot about it on other forums and it seems to be that everyone has put it off as a fad. I ask because I just recently brought a stack of 97 kx250 parts and it came with this mod already done to the crankshaft and fitted with a royal rod. Havnt spun it up with some DTIs yet but it appears to be brand new. I have never heard of this mod before hand but I understand its to increase velocity in the crank case and although the theory is there wouldn't it push lubrication away from the lower rod bearing?
 :mrgreen:

sandblaster:
Steve Parris did the turbo mod for us.
Steve is the only person with a patent on the Turbo crank.
Turbo cranks were all the rage about 30 or so years ago.
Some say that it works, some say that it does not.
Steve says that he would not have spent 15K getting a patent on it if it did not work.
One thing I can tell you, not all Turbo cranks are created the same.
Most try fanning the charge up the transfers.
Generally they gained a bit off the bottom end and lost off the top end.
Steve claims that his design gets more all the way through the RPM range and adds from 600-1000 rpm to the top.
Also, oiling to the entire top end is improved...
That all sounds wonderful.... but does it work?
We will find out likely by the end of this week so stay tuned.

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