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Look at the diaphragm on your master cylinder lid. If it's soft and swollen you've got the stew. If the system is contaminated it goes after the rubber stuff. Use compressed air to blow out the hard lines and then renew the rubber components. Hoses, masters, and rear wheel cylinders are cheap...

Here is an example of a jerk pump injection pump. Fuel enters through right port and leaves out top to injector. You can see that while the plunger is down, the injector pressurized by the lift pump. The left port is the spill port and ends injection. The engine stops when the slot is aligned...

In once case on a much larger engine we blew a fuel injector through a valve cover. The tip had broken on the injector and the fuel tank was above the engine. This allowed the cylinder to fill while the engine was not running and then hydraulic locked during the next start. When diesel engines...

Too much fuel in a cylinder can bend a rod. Is the fuel tank located above the engine?

The lead in paint is in a non-metallic form. Oxides, chromates, carbonates are not metallic.

At Ace Hardware, Benjamin Moore, the FSS colors are listed under "US Government"

Rectifiers are cheap. If you have solar or battery, it should be no trouble to feed such a system with a 400hz generator rectified to DC.

No, Guts is just a brand. https://www.gutsracing.com/

The K&N style filter is the absolute worst you can put on a dirtbike. You need oiled foam. Oil isn't particularly important. This is a 30 horsepower machine. It will tolerate anything. Diesel engine oils have soot dispersants. That's all you need. If the brakes still have DOT 5 and weren't...

JB weld can work. Drain the coolant, end drill the crack, V out the crack, clean clean clean, then apply. Most people will skip at least one of these steps which is why they get bad results and then blame the epoxy. The right epoxy properly applied should be permanent. Be wary that the...

Most electrical wire is PVC or polyethylene based insulation. These tolerate all oil types. Only EPDM rubber is sensitive (SO cord). That's why I say it really doesn't matter what system you use. Use the one you can get. If you do have SO cord, coat with silicone based oils.

Broken bolt extraction from aluminum is really easy once you learn how to do it.

You will need an acid to remove corrosion. Maybe citric acid would work? It's not very strong but leaves no residue. Personally, I would just replace the screws. The terminals and bars are all copper and you'll find them to be a-ok under the screw heads. Afterwards, hose it down with your...

Mine is worn down 2-3 thousandths. I just put new bearings on and ran it. Wheel speeds aren't very high, this is a fairly forgiving application.

The bearings are clearance fit on the spindle and can and will spin which wears down the spindle. My truck has worn spindles.

The DOT 5 thing is funny. There is zero difference between DOT 3 components and DOT5. But, if you mix the fluids it will ruin the components. When I bought my truck there was DOT 3 in the brake system and it caused the diaphragm on the master to swell in that chamber. The rear wheel cylinders...

Timken doesn't sell their own bearings. This applies for all aftermarket suppliers. What was good yesterday may be different today. Always keep this in mind.

Yes, you're missing one. You can see witness marks from the bolt that used to be there. It would be wise to replace it. No, it wasn't sheared off. There is no way that bolt could see forces that would cause it to shear.

If you have a hole through it you can use an EZ Out. Put it in your oven for 20 minutes at 300 degrees and then use the EZ Out while hot. Don't force it, it should come out with modest effort. You don't want to break the EZ out.

You may want to consider polyurethane sealant. Silicone is not paintable.