Valve Clearances on 2020 KTM 450 EXC-F and How to Get Service Manuals
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- Опубліковано 5 вер 2024
- Many private mechanics like myself shy away from doing valve clearances because it’s a fiddly job and can seem complicated.
With the help of the official KTM service manual I learned how to knock out this job with little fuss. The important things are to set aside free time, have a clean and organised work space, and write down the required values.
Get official KTM, Husqvarna or Gas Gas service manuals from print.ktm.com and you’ll be able to disassemble and reassemble your entire bike like a pro!
0:39 Where to get service manuals
2:00 Preparation
3:37 Valve cover, spark plug removal
6:03 Achieving top dead centre
9:06 Measuring valve clearances
16:16 Changing valve shims
24:59 Reassembly and completion
#teamsilkrider
Great video!
Thank you for this very useful and detailed video. We were neigbours at the Hellas Rally bivouac last year, I hope to see you there again this year!
Thanks, yep will see you soon then! Wish I could make more useful vids this year but shits just way too complicated these days!
Thank You
Great! Thank you
очень познавательно. Спасибо.
@silk rider: Good vid & instructions. If the interface between the shim & valve spring is “wearing,” wouldn’t wear increase the clearance (loosen) instead of decrease (tighten)? I would assume less clearance (tight) is due to carbon build up, etc., but more clearance (loose) is due to wear.
Honestly it can go both ways. There are two contact patches, the valve shim and valve stem, and the valve seat and valve face. The valve shim/stem interface can wear because of the contact between the two, damaged or bent valve stems, and other stuff. The valve seat/face interface can expand because of carbon, or it can contract due to wear of the seat or face (or maybe both can happen at the same time). End of the day the only way to find out is to open it up and measure!
Hi, great video! I'm curious what brand of feeler gauges you have that have the 0.11, 0.12, 0.14, 0.16, 0.17 sizes. Most 32 blade sets skip a few sizes starting after 0.10mm :(
Since those are the critical sizes needed in our case, stacking blades to get the "odd" sizes is far from ideal. Appreciate the info!
Hi! Stacking feelers is exactly what we do. This is a precision instrument, and the feelers are meant to be mixed and matched to get the size you need. So I’m always using 2 feelers, preferably close by - so 0.9 and 0.7 for 0.16. The one I have has 0.15 and 0.10, then 0.01 increments down. Get them at any place selling tools.
Cheers,
Great video, how many hours when u did the valve check??
Hey thanks, I can’t remember but I do it every 30 hours. If you’re just trail riding you can skip one every so often.
@@SilkRider all right, and how long can you drive without a adjustment in your experience?
@@jannisgotevas1071 could be 90 hours but honestly it’s not really a “failure” point where something breaks or noticeably fails. All that happens is your valves are opening less (or more) than needed, your power suffers, maybe the mixture becomes out of whack, and you carbon or foul up your combustion chamber and spark plug more and more. So it’s just a general tuning item. If it’s something you’re willing to do, then make it a regular thing because it keeps your engine performing at its peak. If you don’t wanna bother with it and just wanna ride without too much hassle, check them every 60 hours or so. It all depends on how much time you have and are willing to put in.
where is ur rade garage rally ?
I’m doing the national enduro series here so the rally kit is off waiting for any rallies that won’t be cancelled this year.