Mrst came by Sunday to fix superdukes. It was a great day of hanging with my baby girl, just like old times. Only this time she said she understood what we were talking about and she had amazing ideas. First, she suggested when I was adjusting chain tension, why not align the "flats" I was adjusting with the side of the chain adjuster block vice putting it on top to simplify counting, consistency. I had to admit it was much better than what I had been doing. Then when I was tightening the front sprocket, I was inserting a board between the wheel and swingarm to keep the wheel from rollling and she suggested I put it low on the wheel against the rear stand and it would be much easier. Again, I hadn't thought of that and it worked perfectly. Then she marveled that after 30 yrs I finally took her suggestions. Great job.
So, we took a close look at the 1290 Super Duke and decided the brake rotor isn't bent and the chain is fine, so that fixed half our issues right off.
I started on the 990 Superduke before she got here to get a head start. Immediately on disassembly I found the dreaded clutch slave failure. The good part is that it is all mineral oil, so no big deal, especially since I keep a spare. LOL.
Also, before Diana got here, I broke and removed the chain, rear wheel and sprocket. Note that I don't grind the pins, my RK chain tool will push them right out, this is a 535 Regina factory KTM chain, and it popped Mr. Pin right out. Well made tools make stuff easier.
Diana arrived while I was installing the sprocket on the carrier and had cleaned all the gooey parts, hmmmm. I do like how the 990 has the pins that go into the wheel for the buffer, very simple solution to the design. A little loctite 243 was specified, so off we went.
Ooooh! Pretty nice with the JT sprocket, I'd say.
Then we did the chain guide, and she was pretty sorry for herself. I also had to run a tap through the bolt hole in the top of the swingarm to get her to bolt in properly. Seems to me there is a good portion missing here...
Then we moved on to the front sprocket, this is the original factory chain and sprockets with 23k miles of abuse. I have had it since about 3-5k miles and the sprockets are worn, but we could probably have run her a bit longer, the chain wasn't too bad either.
Again, with the proper team and the right tools, chain installs are pretty simple. Also you can see where the chain drug on Mr. Swingarm for a little short bit after they heard the piece of chain guide fail and leave the Super Duke. Not too bad. didn't do anything for this, maybe someday.
Got her in and lubed up, ready to go, loves me some chain install...
One side is riveted, just a quick pic for informational purposes. I measure the factory pins and then expand to approximately that diameter in 1/4 turn steps on the tool, then pull it off, measure and then do the second one to match the first. Then I have a good idea how many turns, how much torque is needed to get it just right. At the end of the day they were within .008 in-ish. Worked well, didn't fall off when I test rode it either.
On to the counter sprocket torquing, Diana determined a better board placement and I had to agree I had been doing it wrong for 52 yrs or so, thanks baby girl, that college might have some value...
So simple yet so effective. I thought it might try to lever the bike off of the stand, but I am just a foolish old man, luckily my daughter is brilliant and keeps me in line and on task. It was fun trying to do stuff while she talked to me, I have the attention span of a gnat, so she would talk to me and I would forget what I was doing, made it fun and challenging.
So with the wheel nicely blocked, I was easily able to torque the sprocket nut to 100 n-m. I love the digital torque wrench, and also new tab washers on sprockets. Hopefully this one won't come loose as we also used the Loctite 243 as specified by KTM.
Then we adjusted chain tension, and hung out a bit before she had to go home. Had a great time hanging with my baby girl, so reminded me of the fun we have always had fixing stuff. Of course, she seems to be quicker than me these days, so I am working on it.
And...the oil level was about a liter low, mostly my fault and Diana's fault, Brad told us to check it and we neglected it. So, lessons learned, listen to the person riding the bike, actually check stuff and man, the 990 is still a sweet bike to ride. So, to recap since about 20-21k miles, I have checked/adjusted valve clearances, installed new tires, installed new steering head bearings, changed the oil, installed a new battery box, installed new chain, sprockets and slave cylinder, raised the idle slightly, installed an RCS master cylinder, replaced the voltage regulator connector, and probably some stuff I am missing. She is good for another 23k or so with only minor maintenance. If you get the chance, ride one of these, there aren't a lot of them around, but they are more fun than most bikes you find and you will be guaranteed to smile when you do. Note that I got all three Super Dukes in the picture without even trying too hard.