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Old 11-14-2013, 02:21 PM   #12121
AMa.
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Don't worry about the water. If it doesn't stall the engine, it is no harm. In the 80's F1 teams sprayed water straight to the combustion chambers to cool down the engines and to obtain more power.

Spraying water to your manifold is also a method of of cleaning the engine.
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Old 11-14-2013, 03:38 PM   #12122
empedrado
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Headshake

I can't remember how thick the rim strip is on the 690 but if it is as thick as the 990's and is under the bead of a portion of the tire this can cause this issue. I had a problem with this on my 990 and passed the issue on to Slavens who checked it out and put a YouTube video on his website expaining the problem.

This is just something else to check, but I as well do not understand not balancing the tire.
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Old 11-14-2013, 03:43 PM   #12123
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Quote:
Originally Posted by AMa. View Post
Don't worry about the water. If it doesn't stall the engine, it is no harm. In the 80's F1 teams sprayed water straight to the combustion chambers to cool down the engines and to obtain more power.

Spraying water to your manifold is also a method of of cleaning the engine.
Cheers Ama.

I don't think it will get into the motor.

The problem is that the foam filter gets soaked every time I ride in the rain and needs cleaning/oiling?????

Thats not a workable solution for me...

Nick

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Old 11-14-2013, 06:37 PM   #12124
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When I first got a 606 front it had terrible head shakes at 110kmh, but eventually settled down with some wear. Now I have mt21 front and back, after 2 rides to work on the road I have not experienced any head shakes. 22psi currently and steering damper backed right off.


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Old 11-14-2013, 06:40 PM   #12125
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[QUOTE=empedrado;22780436]I can't remember how thick the rim strip is on the 690 /QUOTE]


The rim strip on my 690 looks pretty much the same as on 450's etc (about 1" wide...not as thick as I wish it was)....the 950/990's have wider rims I think (rear at least)....and maybe wider rim strips ???

Sometimes tires may not seat properly (at bead) and close inspection should be done after mounting. I have had some tires that took 80 psi and didn't seat....others did at 35psi.

Interesting:

Tire Balance:

http://en.wikipedia.org/wiki/Tire_balance

Speed Wobble:

http://en.wikipedia.org/wiki/Speed_wobble

http://wiki.answers.com/Q/Why_do_you...wobbles#slide1


http://www.eng-tips.com/viewthread.cfm?qid=261996
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Old 11-14-2013, 06:42 PM   #12126
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130 x 90 606 and 140 x 80 mt 21 side by side, the 140 doesn't look huge to me


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Old 11-14-2013, 08:45 PM   #12127
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Looking to purchase the HDB top clamp
Any one can advice what the 690 ER clamp bolt pattern is?
100x38/40 or 90x38/40?
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Old 11-14-2013, 08:51 PM   #12128
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100x38/40 or 90x38/40?
90 x 38 on my 13
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Old 11-15-2013, 12:21 AM   #12129
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Originally Posted by AccelRus MaxiMus View Post
90 x 38 on my 13
It's the same for every KTM model from the last 20 years.
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Old 11-15-2013, 01:09 AM   #12130
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It's the same for every KTM model from the last 20 years.
Lukas you are still pretty amazing now, but you would've been a friggin gold mine before Google came along!
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Old 11-15-2013, 05:13 AM   #12131
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Quote:
Originally Posted by LukasM View Post
It's the same for every KTM model from the last 20 years.
Quote:
Originally Posted by AccelRus MaxiMus View Post
90 x 38 on my 13

Thank you guys! appreciate it
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Old 11-15-2013, 09:54 AM   #12132
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maybe I missed it on here, but I heard there is an airbox recall, anyone know more ?
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Old 11-15-2013, 10:03 AM   #12133
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Originally Posted by poondangle View Post
OK suspension people, I need your help. I have a 13. With my riding style and ability, the stock set up worked great. I could make minor adjustments through the range and I was perfectly happy, except for the stock MT21s. So, I put a Pirelli Rally up front, changing to UHD tubes at the same time, and an XCMH on the rear, again with new UHD tube. I changed nothing else. I immediately got a head shake like there was no tomorrow at 60+ MPH. I was away from home when all this happened. I went all the up on the compression and all the way down on the rebound up front, and added maxed rebound out back. I adjusted pressures down to 16 since I'd be offroad. I rode the bike the next day and the headshake was gone. I subsequently that crashed that day (nothing to do with headshake) and haven't been able to ride until last weekend. So, against the better medical advice of my doctor, surgeon, and most importantly, my wife, I pump the tires back up for some pavement riding and off I went. The headshake is back with a vengeance! What do I do next? What am I missing here?
I'm going to say it's the heavy duty tubes. I go this on my first HD and then on my second. I'm pretty sure these tubes are not really for use on the road, they also need some mouse lube to keep them cool.

Swap back to a standard tube and take a ride. I'm betting your head shake will have gone.

Having said all that I used to get head shake with the original tyres at about 70 - 80mph (can't remember exactly) but it stopped as the tyres got some wear on them.
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Old 11-15-2013, 12:25 PM   #12134
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Clearly there are numerous factors to consider with "head shake", "high speed wobble", and tire balancing"....as these terms may be mis-used/incorrectly applied to these issues.

Some more info/sources to consider:

http://w6rec.com/duane/bmw/wobbles.htm

http://cyclingtips.com.au/2011/03/sp...akes-its-head/

http://www.speedzilla.com/forums/duc...headshake.html

Are steering dampers installed on bikes with these issues....any difference?

As per MT21's....my experience is that they have a weird wear pattern after a while (aside from simple cupping) and in last 1/2 of tire life I have felt this unevenness (but no specific wobble/headshake/hopping).
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Old 11-15-2013, 01:01 PM   #12135
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Originally Posted by fluff34567 View Post
maybe I missed it on here, but I heard there is an airbox recall, anyone know more ?

I had my bike at the KTM dealer in June for a first service and they had an air box fix for me so, yes.
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