Just my 2 cents here as many have different opinions.......... You can play with jetting, timing and fuels, but until you get the head cut for the proper squish by someone that understands the YZ engine squish issue you will just be putting off what ... more »

If you have the manual, the tools needed will be shown there. Paw Paw

I have had great luck with "Primary Drive" o ring chains. They last a long time, weigh less than others and also cost less. Paw Paw

The best fix for this is to have the squish corrected by having the head machined. These bikes are built and run right at the raggid edge of self distruction.. Paw Paw

Your voltage must change or it is not functioning correctly, if connected correctly. Paw Paw

The TPS setting should be between .5 volt and .62 volt as completely closed throttle. ( It will not idle with the throttle closed.) I would not go higher than about .65 volt. Then check your WOT TPS reading. In theory it should be 5 volts at WOT, but ... more »

Been seeing an increase in the starter relays going bad and causing issues with starting and running. Glad you found the issue. Paw Paw

Damn, what a list! The best known riders of the decade day all at one location. That must have been a show! Paw Paw

X2 Paw Paw

https://www.ebay.com/itm/Starter-Relay-Solenoid-CRF250-CRF450-R-RX-Honda-Magnetic-Starter-Switch-G209/274297278041?fits=Model%3ACRF250R%7CMake%3AHonda&epid=16013663611&hash=item3fdd644e59:g:eVMAAOSwY4NeYXWk I think this is the correct unit. Paw ... more »

You would be freeked out to see what comes through the pump fuel lines at gas stations. If you don't prefilter the gas you put into the bikes fuel tank you may see this issue a lot. Look up fuel sock for your fuel tank. Paw Paw

Starter relay is stuck. You have to have the clutch pulled in for the starter to enguage so if the relay is stuck the starter will try to start. Replace the start relay. Now it is also possible for this to happen if there is moisture in the wiring system ... more »

It is not hard to set the TPS, but you will need the correct hook up. You may want to check fuel filter. Paw Paw

Idle may be set too low or the TPS may be set too lean as a lot of new bike are coming to use with it set too lean. Paw Paw

I would suggest that the cam is worn out and you should also see the wear on the head portion of the journals. Most of the time this was caused by and oil delivery problem. Paw Paw

For me it was the years age 50 and 60. I raced and rode all over the country with a great group of guys my own age. I also rode a lot with my son and my 2 grandsons. The second best was between the ages of 30 and 40 when I also raced all over the country ... more »

The pipes top mount may need to be spaced out as well as the silencer mount to get clearance. You have to do things like this on some non OEM parts to make them fit. Of course you could call the pipe company with your question. Paw Paw

Low compression is often misdiagnosed as running rich. Paw Paw

Many years ago the AMA was a real good group for MX racers. Over the years they seem to have changed directions and have become a great organization to collect money from MX racers with little support for them. Paw Paw