Recent content by Gasser Nate

It is usually carbon deposits jammed in the bore/valves and the little tracks they slide in

Yes that is what the threaded section is for. Make up a slide hammer style attachment and remove the left hand valve. Once that is out you can tap out the other side. The main thing to make sure is absolutely clean is the track the sliding rod which lifts the main centre flap runs in. It is...

Did you wash the cylinder with hot soapy water after you got it back from the platers? Sometimes they are a bit lazy and don?t wash them properly. And brake cleaner on a rag is not good enough. The hone lines it the cylinder hold a lot of microscopic honing grit etc. Check for cleanliness with a...

What does your piston look like? Do you warm it up properly before going hard on the throttle? 99% of two stroke rings barely need any clearance adjustments if at all. To me that looks like a cold seizure.

I have heard of a few 18?s having CDI issues. Mine has a spark advance issue not long ago. Not a big fan of the hydria stuff. Test the pick up and source coils first before ordering one though. They aren?t cheap.

I use 3mm Id tubing for the breather hoses. The fitting on the carb for the fuel delivery is about 8mm and the fuel tap 6mm. A quality 6mm rubber hoses stretches enough to fit nicely.

Yep just plated steel. Can be TIG welded easily.

The newer Kyb free pistons whilst still plastic are the open design and not very predisposed to cracking and splitting like the early ones.

If there was a Japanese cross over it would likely be a Suzuki Drz 400. Most of the engine architecture is closely based on them.

Air in the cartridge can definitely do the above. I always overfill them as the excess is purged when you stroke the cartridge before reassembly. They are quite simple to inspect and assemble. (With the right tools)

Very much so. I had massive detonation knocks and the like. TSP performance in Australia did my head and sorted it out. I?d doubt they have changed anything from the gas gas design

The Honda one was for the early bikes. There was an aftermarket one for them as well, possibly S3 or similar. I will try and find it for you. It was xui brand. They make some quality gear for the trials bikes which crosses over to the enduro. Rieju probably makes a superseded part as well.

Spot on! Some people forget about the throttle wide open. New top end is a great start. But also do a leak down test so you don?t lean out the new top end with an air leak.

How did you perform your compression test? That is pretty low numbers. You would be over compensating for the lack of power with more throttle as well.

I believe it is a Yz250f part number. I had the Kyb catalog but my laptop died.