Bike has 16,000 km and started making a noise under load last fall. Did the timing chain and valve adjustment, noise still there, so I'm going to pull the cyl head and inspect piston, rings, piston to cylinder clearances, crank bearing play, connecting rod play, and anything else I can think of. Any chance of getting away with reusing cylinder head gasket, base gaskets? Last time I looked, they were back ordered. Doable with engine in frame? Looks to be.
Could the noise be due to a worn clutch bushing? (I mean this one). I'm afraid it's not possible. When I removed the cylinder and the head from my 610, there were residues of gaskets like these on the surfaces: and this is how the head and cylinder gaskets looked like after being removed: Actually, at the beginning I wanted to keep the two components joined in order to save the head gasket, but both an engineer I know and the guys at the dealer told me that it was a bad idea: once the main four head bolts have been loosened, the compression on the gasket is lessened very much (those bolts are the tightest) and so the gasket could be slightly separated from the surfaces and, therefore, damaged. So, eventually, I split the two components and replaced the head gasket before reinstalling them.
Could it be that simple? I did notice some play in that bushing when I did the spring washers, but the bushing was back ordered so I put the old one back in. Finally got the new bushing, so guess it's worth a shot before digging deeper. Thanks for the gasket shots. I kinda knew the answer before I asked it, but worth a shot lol.
In the future maybe use a copper gasket, ie.. have them made, as you can reuse in most cases. In heavily modded engines I have had there were no more gaskets as big bore kits were so few in the first place. Doing the last rebuild with a bigger set of pistons had to be custom all the way, this was an inline 4. Should be easy/cheaper with a thumper. http://www.coppergaskets.us/MCExamples.html
Alright. Going to order the factory gaskets. Looks like there are 3 options for the head gasket, 1mm, 1.1mm, and 1.2mm. Anyone know what the original one would be in north america?
Assuming that you have already removed it, can't you simply measure the one you removed? Or, if you haven't removed it yet, can't you measure one of the protruding parts of its outer edge?
Going to see if I can get a caliper on a section and measure. Wanted to order the gaskets before I take it apart, last time I checked they were back ordered.
the thinner the gasket, the higher the compression, but might require higher octane fuel, i would call george earl and get his opinion, i retorqued my head gasket when i did the cam chain, was only at 25lbs, torqued to 54lbs, good luck
Since I didn't dispose the used gasket, today I've measured its thickness positioning the caliper around those two lines: The results were 1.4 mm for the tab on the left and 1.7 mm for the line which includes the two black strips (there is another one on the other side) and the yellow circle. I have to say that it was warped (it was in a box together with other stuff) but I doubt that it was so deformed that the measurements were increased by about ½ mm.
Thanks guys. Going to order the 1.1 and pull up he head ASAP. Went for a short ride today, and it's getting worse. Here's a short video post ride. Something is not right. View: https://youtu.be/_grmfyYbVxg
