Recent content by FL-Rider

Are the heads original, or have they been machined in the chamber? I have a different engine than you, (951) but the concept should be the same. I purchased a rebuilt engine and the heads had been shaved and the domes had been also been machined. This resulted in a large squish measurement. The...

Mine is a 98 xpl so it might be different. On mine there is a ground strap (approx 14 guage wire) that is connected to the engine by one of the front magneto cover bolts. My negative battery cable bolts to the starter housing.

Have you tried a terminal tool to remove the pins and sockets?

If you think its electrical, you could check the ground strap connection on the front of the motor. I would also check the negative battery cable connections at the starter and battery. You could unplug your harness connections and use a bright flashlight to look at the pins and sockets. If you...

One way to test would be to disconnect the fuel supply line from the carb and splice in a short clear polyurethane line. If you get steady bubbles then you likely have a leak allowing air in. If your engine won't run to do the test, put a longer clear line into a gas can and get a siphon going...

Maybe the spark plugs fouled from sitting in oil when upside down? 2 strokes can hold a little residual oil in the crankcases after shut down. Maybe run some tests on the fuel supply to make sure no air leaks or restrictions on the suction side?

Could it be piston slap? The first and third videos sound kinda like it. The second video with the pump off and slightly higher rpms didn't sound as bad. I had a 951 do something similar. It was after it had a head gasket leak and water ingestion. At idle I could hear it. Above idle it got...

Could it be that the machine shop machined the cylinder and/or head at a small slant and took the material off unevenly? Does it leak when you test the cooling system side or when you test the crankcase side?

You will have to do process of elimination. You could get some 1/8" rubber sheet and make holes in it for the head bolts. I found that a hollow punch from harbor freight works good to make the holes in the rubber. Snug down the head on the rubber sheet and then do the pressure test. If it's...

You can measure the cylinder diameters without removing the cylinder using the right tool. Then check the stamp on the pistons to see if they are standard or oversize. Ultimately you might have to remove the cylinder anyway, but that can give you an idea. Check your head with a straight edge to...

Bubbles can mean a leak on the suction side of the fuel system. It could be in the tank pick up, the hose connections, fuel selector, fuel strainer, or fuel pump gaskets. A single bubble probably wont matter but a stream of bubbles means air is getting in. The hoses can harden over time and...

If you want to do some trial and error while waiting for your rebuild kits to arrive, then you could try... 1) Run with the gas cap loose to see if your air inlet check valve is stuck which could affect fuel flow 2) Install a clear polyurethane fuel hose in line with the fuel supply line and...

You have to remove the seat shock/spring and go in through the top.

You mentioned it ran good two weeks ago but you had a concern there might be water in the gas now... Did something happen since two weeks ago that could have allowed water to get in?