GPR Camp: Replica Racers

Piston came yesterday -



Hopefully have it together this weekend.

Got the engine assembled and back in the frame this weekend. Fired right up and my son took it for a quick spin around the neighborhood.

Feels like the steering head bearings are damaged, so that's the next project.

My son is also working on 3D printing a tuned velocity stack to replace the crazy airbox. Most likely there will be some jetting changes required to get it running properly.

So far so good...

My son had the CRF150R out on the USAir track in Shawano, WI, yesterday, and he said it was stronger than ever with the high compression piston and rebuild. More low-end pull and lifted the front where it didn't before. New Bridgestone slicks as well, but the track was pretty green and a bit slippery in spots. Lap times were 2 seconds quicker than last time out in the fall and under the times for the last race winner.

That's the good news.

The bad news is he chopped a corner too tight, caught the peg on the curb, lifted the rear and low-sided. No big deal except his leg got caught and twisted significantly, which led to a trip to the local ER. Now back at our house waiting to get an appointment with the Ortho Doc. Pretty sore all over. That leg already has a plate in it, and he may need more work.

But the bike isn't too bad....

His 150R Supermoto(front) and 450R Supermoto/Icebike before the incident -