buildyourown

If your shims are cupped you should replace the rocker. It will wear the new shims at an accelerated rate. Check your rocker shafts and cam too.
Im fixing the same issue. My motor was ran with clogged screens and the rockers were starved for oil. Check your exhaust side too even if the clearance is in spec. My shaft had bound but the clearance was correct.

Whosaberg

Blue Marble Rider Youtube Channel has a complete video for 09-on FE bikes. Very good.

mdc

Firstly thanks to jeffk95z for sending me the collated instructions and photos from this Thread very easy to follow except I have a question regarding the rocker Arm shaft.

I used the rocker arm shaft method and pulled it out completely ( Yes I know the instructions in the thread say do not completely remove the shaft but I missed that bit )

Is there anyway to tell which way the rocker arm was in the there originally , maybe some wear marks etc....? I get in can on only go 2 ways so 50% chance it goes in the same way


Valve check specs

2010 450FE with 6600km 180 hours

Inlet Valves both within spec

Exhaust right side within Spec

Exhaust left 0.10mm fit and 0.12mm did not fit also tried and 0.11mm which did not fit - out of spec

The Shim I removed for left Exhaust measured 2.81mm ( it actually has 2.x5 stamped on it. the number after the . is worn off )

So off to the KTM store for a 2.60 shim or there about

cheers
Marc

2ndGen

Just about to do a valve check on my FE570 with 13000 miles on it. I had a cupped shim last time so I'll see if it's happened again and inspect the rocker arms. Any advice on what to look for is welcome. I see a pic on here with wear on the rocker arms so that's super helpful. As is all the varying input from all the members on here. Such a great resource.


My main question though, I'm going to do a leak down test at the same time since all the parts on this bike have so many miles. I want a reality check on where I'm at on the top end. They say lock the brake while you're testing so the engine doesn't turn over with the pressure.

So, can I use the TDC locking bolt for this or is that not strong enough and might I just break something trying that?

Also any advice on % leakage that's acceptable. There's no spec in the handbook so I'll just go by the tool (Motion Pro) which says up to 14% is good condition.

Thanks all.
Jake

2ndGen

When I take my cam out the rockers will not rock back freely far enough to get the shims out. I replaced the rockers and the rocker shafts. I hope I didn’t mess something up. Any thoughts?