I
received the motor on Friday, March 23rd. After
tearing open the box and tossing out 2 full garbage bags
of newspaper, there sat the motor. It was beautiful with polished cylinder
and freshly painted cases. It looked brand new and
practically was. I unbolted the 2 bolts holding
the engine in the cage. The bolts were mounted through the bottom of
the engine and through the front motor mount. I lifted
the engine out and sat it on a sheet of cardboard to
take a few pics. The chassis had been prepped and
ready for the motor for about a week prior to the motor
arriving (I was very excited and had to do something to
keep busy), so inserting the motor was a pretty simple
task. The engine was carefully slid into the
chassis and the motor
mount bolts put through the engine cases and tightened
down. The head stay was left off, as Dave
recommends not running it due to it causing excessive
frame stress and cracking. I then installed the ESR
TRX-5 pipe , (Dave really 
likes this pipe on his motors and recommends it for
most builds), installed my silencer, tightened down
the coolant hoses, and filled up the radiator. I
then put on the new 38mm Mikuni TM that MP had supplied,
tightened down the clamps, double checked everything,
poured some Av Gas premix into the tank, and got ready
to start the engine. It started on the first kick,
which surprised me a lot, since it usually took my old
motor a few kicks to start, and this motor wasn't even
broken in yet. I let the motor idle for about 8
minutes while occasionally blipping the throttle,
letting it get nice and warm before shutting it
down. This is
to run heat cycles and break the motor in (Wiseco
pistons LOVE a good break-in). I did this three
more times and then took the bike out on a few nice easy
rides. I went through about 3/4 of a tank of gas
before I decided to see what this puppy would do.
I took it out on the dirt road in front of my house and
opened it up. Holy cow! Talk about a fast revver,
this thing ripped! It's pretty much every 250R
owners dream engine, good pull off the bottom, a
hard hitting and high revving midrange and topend.
With running 14/38 gearing and 20 inch Razrs, I had no problem letting the motor pick the front end up
in 4th gear on the gravel road. After the break in period, Dave suggests
that you send the piston back to him so that he
can bead blast the 
skirts with virgin glass. The reason for
this is to help increase oil retention on the piston to
reduce friction and scuffage, and to bring back
about .001" piston to cylinder wall clearance. This
motor is by far the fastest 250R I have ever ridden and
its only 250cc! On a recent trip to the Silver Lake Sand
Dunes, I was running neck and neck with a lot of
modified Banshee's and a Pro-X cylindered 330 or 350R's.
Everyone that rode my 250R had the same general
consensus which was "WOW!" this thing rips!
I am very pleased with Dave and what he has done to
my motor. No longer do I have to be worried about
not having enough HP at my fingertips. But that
only tells part of the story. Dave also has
exceptional customer service skills and will not sell
you something that you do not need or does not work.
Dave lives for weekends at the dunes and builds
everything that he races. You can purchase the
same motor that he runs in the Dunes of Oregon.
Please visit MP Racing's website for a complete list of what he
can do for you. Plus, you will see some cool pics of Dave's
creations. Dave also has a Message
Board [no longer functional]where you can ask him questions. You can
also visit with Dave in our chatroom
[no longer funcational] on Wednesday evenings as he will answer tech.
questions.
[This company
is no longer in business]
 MP
Racing
1550 4th Street
Salem, Oregon 97303
Phone: 503.361.7666
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