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Post by 90GTVert on Apr 27, 2021 9:52:26 GMT -5
You really don't have any luck. I can't believe Yamaha don't have a special tool to hold the cams in place. There's no mention of anything about holding the cams in place. I think that must be what the hole in the exhaust cam sprocket is for. At first I thought maybe it goes easily if you don't have a valve pad out of place to cause 0 clearance or pressure on the base circle... but then the last time I did it the valve pad was in correct position and it still clearly didn't want to stay without the awl. I'd love to blame this on luck, but I think I'm just dumb. If there's something good to come of it, I have a feeling this one sticks. Much like how I now write notes when oil or gear oil is not immediately replaced; I don't think I'll turn through resistance too often, even when I do feel crappy.
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Post by 90GTVert on Apr 27, 2021 12:31:24 GMT -5
I watched some videos of cams in other powersports vehicles, because I don't think I'm so daft that I'm the only one that has ever had issues with a cam install going smoothly. Not saying others are dopey enough to bend their valves, but surely someone else has had the chain pop off of sprockets. Maybe I could find something to make it ever easier. I don't normally work on DOHC stuff. I've done tons of SOHC small engines and I've worked on quite a few pushrod small block Fords, but I have no real experience with this (could ya tell?). What I found was that in the vids I watched people glossed over cam and chain install. Great detail about shims and so on, but then the cam magically appears installed. That makes me assume that it didn't go super smooth, because that's generally how rough spots are dealt with in video editing. In other videos, I could see that not all applications seem to suffer from this problem. The vids that did include the cam/chain installs went like you'd think it would by the manual. Put the cams in and on the chain, torque down the caps, install the tensioner. Butter. Then I found a video directly from Yamaha for techs. They do mention some problems and show that they zip tie the chain to the sprocket to keep it in place. They also install the tensioner before the caps are tight. So it seems that Yamaha knows that some of their operations don't go as planned when following the manual. The service manual has served me well for every other task. Odd. They do always stress to NEVER turn the crank while working with the cams. They got that one 100% correct. lol Here's the Yamaha tech vid that I mentioned : youtu.be/HaB63_N-lxc
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Post by aeroxbud on Apr 27, 2021 13:32:54 GMT -5
They must be aware of the chain jumping, like you said. They don't normally advise using cable ties.
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Post by oldgeek on Apr 27, 2021 13:52:27 GMT -5
Good grief! Very glad I did not get one of those, what a PITA. Dont kick yourself to much, I still have you beat by forgetting gear oil 2 times! Not that I am proud of it.
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Post by captincvmn on Apr 27, 2021 15:16:00 GMT -5
RC-One-T-Max
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Post by 90GTVert on Apr 27, 2021 15:17:21 GMT -5
If I had a CR500 lying around...
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Post by captincvmn on Apr 27, 2021 15:22:51 GMT -5
Sean at SRK Cycles in Landisville PA has one he installed into a Harley. Maybe he would part with it. It shock the Harley to bits. youtu.be/4Xfkju3VENM
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Post by 90GTVert on Apr 27, 2021 22:26:43 GMT -5
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Post by Lucass2T on Apr 28, 2021 3:47:01 GMT -5
Is that a burnt valve seat?
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Post by 190mech on Apr 28, 2021 5:31:20 GMT -5
Designed to be assembled once and let the end user worry about cocking that bear trap again!!
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Post by 90GTVert on Apr 28, 2021 7:56:35 GMT -5
Is that a burnt valve seat? Should just be a bent valve. Never ran this way.
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Post by 90GTVert on May 2, 2021 8:33:44 GMT -5
I'm hoping to have part 2 of the TMAX service vids up today. Currently producing/rendering. Thought I'd get there yesterday, but hard drive space was running low so I deleted some files that I didn't need anymore. I've got over 800 4K clips on here from just the TMAX service so far, so it's a lot of space. Turns out, I was wrong and some of them were in the timeline for the part 2 video. Oh crap.
Ended up running some file recovery programs. I recovered 532 files in total, and searched for the ~20 files that I still needed. Found all but 1, which was the intro that I could redo. All were named different after deleting and recovering, so then I sat around trying to figure out what's what and put Humpty Dumpty back together. Wasted most of a day on that whole process.
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Post by aeroxbud on May 2, 2021 9:32:03 GMT -5
This TMax thing is a fight, from start to finish. 😢
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Post by 90GTVert on May 2, 2021 20:59:02 GMT -5
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Post by captincvmn on May 3, 2021 15:31:36 GMT -5
How much storage (computer) do you have currently? Xmas is just around the corner......
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