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Discussion in 'Crazy-Awesome almost Dakar racers (950/990cc)' started by PRJKTM, Sep 22, 2008.
Ah, got it. I got you confused with the OP.
Check your chain tension. I used to run mine way too tight. When I started to experiment , I noticed a big improvement when I "loosened" it a lot. Also it's better for the suspension and the bearings. Also check the tank bolts to see if they are too tight.
hope this helps someone.
Killer Whale KTM
He stated that the vibration is there when stopped and just reving the motor. Vibration goes away when clutch is pulled in at speed.
I agree with previous post... check main nut on clutch basket and related parts. MAKE THE DEALER CHECK IT OUT!!!!!!!!! It's a new bike and the 990's natoriously smooth.
Both bikes had the 600 mile service. I had a slight vibration from front tire on my bike. Dealer replaced the front tire (no cost) with a brand new Scorp/and found the front rim slightly out of round. New tire and a trued rim, all is well and smooth.
Both bikes have been running great. no issues.
Vibration..... just for info
Old thread for sure, but I just got back from my first ride on the 2012 990R and searched this topic. I too am experiencing bad vibes between 4/5k rpms. My 950 did not do this. I'm trying to really work the allowable rev range and do a proper break in. The manual says up to 6k ok. Maybe 6,500 rpm but I only took it to 5 or so where it smoothed out nicely. Below 4k very smooth too. It may be just a break in thing. I read somewhere about a yamaha super tenere vibrating badly until it had some decent miles on it. I'd love to find another 990 to ride now.
Not sure if I should just put the first 600 miles on or take it in now. Seems a little hasty, only 75 miles on it!
Any 990 input?
This bike needs at least 3-5000 miles on it to start working right. They are really sweet after the first 'proper' valve adjust.
These bikes are very sensitive to chain tension. The lowered (STD) models can get the chain tighter and will be smoother. The longer travel will just have to live with some vibes. When it gets even slightly loose, you'll get a vibe at 4200-5000 on the highway, more with a load, none without a load. It's only about a 1/3 turn on the adjusters to go from vibes to no vibes.
Never over tighten. Have two friends sit on it and check the tension. It should not be bow string tight.
Thanks for the tip!
I'll give it some more break in time, weather permitting. I'll check the load vs no load at the 4200 to 5k vibration zone, hadn't thought of that...pulling in the clutch or trying it downhill. I'll also check the chain tension.
I remember one time getting my then new 888 back from the shop and having a horrible vibration at certain rpms. Eventually i stopped and checked over the bike to hear the ticking sound of a chain about ready to explode from heat. It was so freaking tight and so freaking hot i wouldn't dare ride it, so I walked to a house to borrow tools to loosen it.
Apparently the tech at the shop didn't tighten either the axle bolt or the tensioner bolts and it tightened as I rode it.
I check stuff out a little better now.
Anyone ever try those Dyna Beads in their tires?
Anyone else have ideas on what to check? My bike has slowly picked up a vibration and it's bad now.
I had the same problem on my bike not so long ago. I looked at balancing the Throttle Bodies, but they were fine. I then thought maybe I had a loose engine mount, but they were all good. Chain was loose enough to not cause the issue either. I thought maybe it was the new knobby tires, but once I pulled the clutch in the vibration went away so I knew it was engine related.
Turns out, my fuel filters were clogged causing excessive vibration in the engine. I replaced them and ran some Seafoam through the first tank and it all went away. Now I know what that symptom feels like and replace my filters at the first sign of it.
I just replaced mine so I don't think its that.