This is the first 180 Yamaha I built in 2002. The Exhaust port was raised 2mm and the piston skirt was cut 6mm. It had Barnett clutch plates and a couple of closer ratio gears from an RD200. I used Chevy points and made the backing plate and cam. It used total loss electrics. The seat is a TD1C fiberglass replica made in Oz and sold by Neil Collins. He also deals in many NOS and used Yamaha parts. The fiberglass gas tank was given to me and when I couldn't stop the leaks, I made an aluminum tank to go under the fiberglass shell.

The frame is stock except for the footpeg mounts and even has the stock rubber swingarm bushings. I'm using stock CS3 forks with spring spacers and 30w oil. The rear dampers are an old set of Boge that I had in my spare parts. I'm happy with the handling and the power is good. It weighs about 200lbs.

I won the USCRA 200GP championship on it in 2005

This is how it looked in 2007. It has a PVL ignition and I made a dry clutch. I've made a few sets of chambers but the first set seems to work best. The crank had been in it for 4 years without a failure. This year a rod bearing got loose and I replaced the crank. It now has Red Wing 32mm forks and both chambers on the right side. I also raised the bike a bit to get more ground clearance. The clutch drive needs to be modified as it is getting worn.

My son rode it to the USCRA 200GP championship in 2007, 2008 and 2009

This is the 125cc Yamaha YA6 I built in 2007. I made the frame and swingarm and the dry clutch. I built it a bit too low and there's not much room for the expansion chamber. I'm going to raise the suspension so I can try a larger chamber. The gearbox ratios were too wide so I made a couple of new gears and now it only drops 1000 rpm from 3rd to 4th. For the last race I put together a motor with two  carbs. So now it has the rotary valve plus a reed valve  that feeds directly into the crankcase. It is almost as fast as my 180 and weighs about 25 pounds less. I have now enlarged the cases to fit the valve and 26 mm carb from a CT2 Yamaha and will try to make a set of straight cut primary gears.

I built this CT1 Yamaha 175 for the Ultralite Super Vintage class. It runs OK but the motor hasn't been modified much. It has a 26mm carb and the barrel is ported a bit with a 2mm over Wiseco piston. I made 2 pipes but I'm not sure which one works best. I have a barrel that Kevin Cameron ported when he was working on a TZ700 and an MX400 reed valve with 38mm carb that I will be trying some day. I also have a 6 speed transmission from a later model MX125 that I hope I can rework so it fits. The frame is stock and the forks and front brake are from an RD200. I machined 2 pounds off the front brake rotor.

I machined a dry clutch using TZ125 plates and I machined a new basket to fit.  When I couldn't find a motocross head, I machined a high compression head from a block of aluminum.