Front tire F 800 GS

Discussion in 'Parallel Universe' started by onthemain, Sep 21, 2012.

  1. onthemain

    onthemain Adventurer

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    I am going to Death Valley in spring next year and have TKC 80's on my F 800 GS. They work really well for the riding we do around Alberta (gravel roads and some off road)

    <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:eek:ffice:eek:ffice" /><o:p></o:p>
    I am thinking of trying the Pirelli Scorpion Pro All Terrain/Enduro Front Tire for the trip only .

    I am wondering if anyone has a lot of time on one of these on the F 800? I am a little hesitant because they look like they would work really well on my SXF 250
    <o:p></o:p>
    <o:p>Before I get "stick with the TKC" the guy we are going with (guide) is not knowen for staying on well traveled trails</o:p>
    #1
  2. itsatdm

    itsatdm Long timer

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    Death Valley is a National Park, not a place where you can go cut a trail.

    Most of the roads consist of a lot of gravel mixed with sand, some harder to ride than others. The TKC 80 work fine. I think you will find that roads like Mengle pass, Steel pass or Lipponcot challenging enough on a big bike and tires will be the least of your concern. If not go ride Echo canyon.
    #2
  3. onthemain

    onthemain Adventurer

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    Thanks for the info ! I doubt he would be blazing new trail in a park ,but he is the kind of guy that given the choice between two roads he will choose the one he thinks you and your bike are most likely to fail on .

    So mostly gravel I will be fine on the 80s
    #3
  4. itsatdm

    itsatdm Long timer

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    To some extent the lack of gas is going to dictate your routes. Fuel at Furnace creek, Regular gas at Stove pipe. No gas at the north end of the park. Outside of the park, gas at Beatty, Shoshone and Panamint springs.

    Most riders try to put together loops and some are pretty long especially going north.

    Lots of in and out canyons, but always keep your fuel needs in mind.

    most of the roads are a mixture of sand and gravel from one extreme to the other with some rocks thrown in. There are lots of videos on You tube.
    #4
  5. onthemain

    onthemain Adventurer

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    Sounds like you know the area really well.

    What I am worried about with the 80's is stuff like this.I would have no issues riding this (not near this steep) if I have the correct tire
    I know what works well on a dirt bike but dont have near enough time on the f 800 to decide what would be a proper tire

    Copied for another post
    [​IMG]
    #5
  6. itsatdm

    itsatdm Long timer

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    Probably not a suitable subject for a Beast post. If you post in Western Regionals, you will get all the advice you need. There are 2 big DV events per year and lots of individual rides.

    That's Goler Wash/steps, the west entry point to Mengle pass. If you can ride it, the tire won't make much difference. There is some sand at the Eastern end that might favor a Pirelli.

    I happen to think the TKC 80 is a good all around tire and adequate for most of the roads, especially on a heavy bike.

    What is unique about Death Valley is the road conditions change every year. 4 years ago, that pic was a gravel road. Even I could ride it.

    Ask again before you go.
    #6
  7. onthemain

    onthemain Adventurer

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    Do you run the 80s?
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  8. itsatdm

    itsatdm Long timer

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    Other than a Michelin T63 experiment, that is all I have run. Yes the fronts cup and new they get the weave. I flip them and double my mileage.

    My first time in DV on the stock bike, caused me to spend about $2,000 in suspension, air temp module, G2 throttle tube and a Scott stabilizer.

    If the bike is stock, tires won't be the issue. :deal
    #8
  9. onthemain

    onthemain Adventurer

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    okay my tires are good.
    Front forks getting 1600 dollar upgrade in the next few weeks
    why did you do the air temp mod?
    and Throttle tube
    #9
  10. CheckerdD

    CheckerdD Long timer

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    The problem with the TKC is they wear out really fast. I just mounted a pair of Heidenau scouts. AKA K 60. I have friends who say they get around 10,000 miles on the rear, more in front. That is easily twice as many miles as the TKC. I must say the Heidis were almost as good in deep sand and loose rock as the TKC's Compared to either TKC or K 60, the Pirelli Scorpion is a street tire. That is what I had on before the K 60. think about getting the Heidis. Dave
    #10
  11. itsatdm

    itsatdm Long timer

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    The first trip was actually next door in Saline Valley, though the roads cross into both.

    The problem was, the bike was too tall geared for some of the terrain and the suspension too poor to go any faster.

    I got into a tank slapper on the road out of the Racetrack, that a DL650 had no issues with. I dinged the front rim a couple of times on Lippincott and Jail canyon, primarily because of the inability to control the throttle.

    I found hills that were too steep for 2nd, but 1st gear aggravated the throttle issue. There are grades you just cannot feather the clutch all the way, if you want to keep one.

    I have a Bitubo insert, Ohlins front spring, Hyperpro rear and a Scott's Stabilizer for the past 2 years. Night and day difference.

    I determined the throttle issue is really a fueling issue. The bike idles at very lean air fuel ratios. Open the throttle and it quickly richens up which provides more power. It is when you are cycling between extra lean and a richer mixture you get this abrupt throttle. I could not control it with the bike bucking around because of the suspensions inability to deal with rocks.

    Some people use a 15 tooth sprocket. I have one but bought the G2 throttle tube. It requires more throttle movement initially to apply the same amount throttle. The accelerator module is a resister that changes the sensor reading from the air temp sensor and tricks the ecu into providing a richer map. A richer mixture provides more power and in this case earlier in the rpm range between the two, I do not use the 15 tooth any longer.

    I always say suspension first and this brought it home. Good suspension allows the bike to navigate terrain that would other wise beat you up. It may save your rims too.

    There are less impacts through the handle bars, making it easier to modulate the throttle in low rpm situations.

    The module only works in open mode (when you twist the throttle) but a richer low rpm mixture makes more power and actually allows the bike to lug at lower rpm.

    The stabilizer is a bonus. Never had one and did not think I needed one. It works in all terrain. There are some sand/silt beds, lots of water washouts and the bike tracks right through it.

    Death Valley is unique. You can't appreciate how huge and remote it is. It gets little rain, but when it does, there is not much to keep that water from completely changing the terrain. For giggles, google the great DV flood in 2004.

    There is enough track to fit any bike. Chloride Cliffs, Titus Canyon, The Race Track, Skidoo, Hunter Mountain, if the weather permits, are normally good rides on a big bike with intermediate skills. Steele pass is doable, if your sand skills are good, but you will need extra gas. I do not know about Mengle pass anymore for me. That picture used to be the easy approach up it, with Mengle being the more difficult. It appeared to be the opposite a year ago. Who knows when you go.

    I actually prefer my KLX680 down there.
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  12. Bayner

    Bayner Long timer

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    I loved the Scorpion Pro on my enduros. I have no reason to think it would do any worse on the BMW. Having to run it at higher pressures to reduce rim damage may reduce it's effectiveness however. It will have total shit handling characteristics on the street under a bike as heavy as the BMW. It was poor on a 250 lb bike.
    Yah, looking back, that's probably the best mixed terrain tire I ever tried...
    Scorpion Rally is pretty good too and stands up well under the GS. Knobs are a bit larger though.
    #12
  13. onthemain

    onthemain Adventurer

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    Did you do the Air temp mod yourself or buy a kit from someone?
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  14. onthemain

    onthemain Adventurer

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    have you run the Scorpion Rally on an F 800?

    I like the 80s alot but I know the would suck in any kind of sand we might hit
    #14
  15. onthemain

    onthemain Adventurer

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    I was going to try these for my next set of day to day use.These are the only other tires my dealer stocks
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  16. itsatdm

    itsatdm Long timer

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    Its plug and play. Accelerator Module, Booster Plug and Inmate High Tech Coon Ass provide them. Look in stickies for details.

    Booster Plug has a good explanation on how the BMW fueling system works and what the resisters do. Educational if nothing else.
    #16
  17. Bayner

    Bayner Long timer

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    Yes and I prefer it over the TKC. Doesn't handle as well on the road (should be obvious) but it's not obnoxious, and lasts about the same mileage. Definitely has better off pavement traction. Haven't heard anyone complain about one yet and a few guys have tried them. You can pick one up on sale every now and again for about $60, which is also hard to beat...

    For me the GS is a handfull in the sand regardless of which tire is under it so I can't say how it compares there.
    #17
  18. toowheels

    toowheels on a mission...

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    I'll second the Scorpion Rally up front.

    It's definitely better off-road.

    -Tracks better, particularly over bumps/rocks
    -Much stiffer casing so you can run lower pressure and not worry about the rims as much. The interesting thing is the side walls are much stiffer than a (TKC not hard to do) but the centre of the tire is soft. I think that helps the tracking too.
    -Much better braking off-road and in the soft/loose stuff
    -I think it does work better in the sand. Not a lot of sand here but I still think it worked better and with lower pressure it would work even better.
    -Doesn't give up much on the road but it is louder of course. I didn't get any scares from it including high speed cornering. I didn't really get to try it on wet pavement much.
    -Wear seems good. I took mine off after a couple of months/trips (has about 3500kms on it) to save it for Death Valley/ Baja type trips. It has lots of life left. Take it easy on the front brake with it to minimize the cupping.

    [​IMG]

    I mostly ride a TKC up front and it's good but I wish it had a stiffer casing and was a little more open.

    I'll also second HTCA's power controller. :thumb

    Dave
    #18
  19. onthemain

    onthemain Adventurer

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    Good info ! Thanks for all the input
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  20. crossplane

    crossplane Adventurer

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    I run the Pirelli Scorpion Rally on my 800GS and just came back from a weekend away of beach and sand trail riding. I have nothing but excellent things to report, it's been a fantastic front tyre for me in that sort of terrain, in rocky terrain when riding out in southwestern queensland and also it's wearing pretty nice.

    Grip on the road is pretty surprising as well, it certainly has more than enough for punting around at reasonable speeds, though it weaves around a bit when at high speed.

    +1 for the scorpion rally.
    #20