2017 American Flat Track Thread (Formerly known as AMA Pro Flat Track)

Discussion in 'Racing' started by randomride, Sep 26, 2016.

  1. villageidiot

    villageidiot Long timer

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    I'm not sure where the track at perris, ca comes in, but the socal flat track track is pretty great. Good show, lots of local talent. Used to get a great show "the night before Pomona". I don't think it's a true short track, it's a little longer, I think less than 1/4 mile. Maybe this year the night before perris will be a good night. The track AFT is running on in perris is at the sprint car track, about 20 miles away or less (never made that drive) is perris raceway, and so cal flat track.

    True short track I imagine is like the track size at Costa Mesa speedway, though they don't run flat track there, just speedway. Where sliding is the norm. Haha.
  2. harborhacker

    harborhacker Adventurer

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    HD back into Flat Track? Sarcasm I guess?
  3. stk0308

    stk0308 Long timer

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    Some thought they were going to walk away once the XR started loosing it's competitive edge for them. Last year looked like the beginning of the end for the factory XR.
    There's been a lot of silence from the HD racing effort. No big rider announcement. No announcement of what they'll be riding. Rumor is the XR is dead at the factory level, they're going with the XG, come hell or highwater. But, they haven't confirmed that. 65 days til the first race and no solid announcement of the Harley Factory team.
  4. Foot dragger

    Foot dragger singletracker

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    Lodi Cycle Bowl is kind of a big shorttrack near Sac. They have a big money race there before the Sac Mile.
    Its a fast wide blue groove, Im sure some sliding goes on,they go Fast around there! I guess around 1/8 mile is a good shorttrack size,not tiny not big.
    Lodi is old school,flattrack has been going on there a long time.

    Auburn Fast Fridays Speedway track is smaller then 1/8 mile but they have some great races there,they ran shorttrack bikes with some pros last summer and it was a good show.
  5. villageidiot

    villageidiot Long timer

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    definitely, auburn puts on a good program, its a little longer than costa mesa (CM is 180 yards around the pipe), and auburn is more "paper clip" shaped if that makes sense. the promoter at auburn does a good job of packing the house every weekend, we went up there twice last year. once for the nationals, and again for USA vs World.

    lodi is definitely old school. i haven't been there, not sure why not, guess its a long haul from So. Cal.

    at perris i would bet its between 1/8 and 1/4, the DTX guys run 14-15 second laps, the good speedway guys when they run flat haul the fucking mail. its nice and wide, plenty of dirt, room to pass, and deep corners for multiple lines.
  6. Wa Ho Thuk

    Wa Ho Thuk Been here awhile

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    Technically the XR 750 has been dead at the factory level for years.The reason it remained competitive was due to the efforts of some really talented independant tuners . Still , on a bad surface it is hard to beat . Jared Mees ran away at. The OKC mile , if not for a red flag he would have won by a huge margin . He missed a shift on the restart allowing Smith get in front and still passed him mid corner between 3 and 4 with a couple of laps left . There will a few XR's racing for a couple of years and remaining in the hunt .
  7. randomride

    randomride Motorcycle Junkie

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    The XR's rotational mass is what keeps it competitive at certain tracks. Their week point is the rpms that have to be turned to keep them up front.
    never2old4fun likes this.
  8. old17p

    old17p Adventurer

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    Like them or not, HD brings some excitement and fans to the track, some to see them win, and some to see them get beat.
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  9. PeteN95

    PeteN95 Long timer

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    Did you miss the last race? The dust sucked, but that was some high speed slidin! I also don't think you understand road racing? All the fastest road racers slide in every corner, you just may not be seeing it.
    KX50002 likes this.
  10. ossadmr

    ossadmr Been here awhile

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    I watched it on fans choi and knew some one was hurt bad when it takes that long to re start the race. Most people feel the young man couldn't see because of dust in his eyes, why else would he get tangled up in the back straight outside rail. Morehead should have stopped that race. I don't watch road racing when it was no longer in the grand national program I lost interest. I did see some great races at the 200 when they started 130 to 140 bikes I can still hear that Honda when bugs won. By no means am I trying to be a smart ass, I just miss the broad sliding side by side racing.
  11. randomride

    randomride Motorcycle Junkie

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    What caused Kyle to get into the fence was coming off of turn 4 too high and into the lose dirt. It simply sucked him in. Very sad, but it was a racing incident brought on by a bad decision.

    All the issues that day were in the GNC2 class. The GNC1 riders never tried to over ride the track and simply took what it would give.
  12. harborhacker

    harborhacker Adventurer

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    As I said earlier in this thread the HD Factory team will be a 3 man team, Coolbeth, Johnson & Robinson. They will operate out of the Indy shop of the HD drag race team. Vance & Hines will be the major partner in engine development, etc. They are even moving up to a 18 wheel tractor trailer race truck to haul the new 3 man team.
  13. harborhacker

    harborhacker Adventurer

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    Zanotti team had that HD XR750 twisting to about 9400 rpm on the miles , that's about the max
  14. harborhacker

    harborhacker Adventurer

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    Great news today about AFT signing with NBC Sports Network to televise all 18 races in 2017. Reported on Speed Sport News today.
  15. harborhacker

    harborhacker Adventurer

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    Coolbeth won the fall Springfield Mile last year on a XR750 by passing the Kawasaki. That surface was hard pan almost like asphalt, very high rpm race going 25 laps non stop. I would say that the demise of the XR750 is over exaggerated.
    Robinson won the Lima 1/2 Mile on XR750 in the pea gravel. It's still a bike for all size and surface of track.
  16. stk0308

    stk0308 Long timer

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    Great! Where's the press release for that? I missed it.
  17. harborhacker

    harborhacker Adventurer

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    Any day now. It's a done deal.
  18. ossadmr

    ossadmr Been here awhile

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    Do you know that for a fact. 9400 on a push rod motor wow no wonder they are having to overhaul them after every race and Harley does not sell xr parts any more. How long can they keep racing the xr?
  19. harborhacker

    harborhacker Adventurer

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    That's right from the horse's mouth, or they were pulling my chain. They are twisting them to the max. As you know the XR has had a lot of engine failures since the Kawi arrived on the scene.
  20. Wa Ho Thuk

    Wa Ho Thuk Been here awhile

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    Yes , 9400 RPM's . The best ones make about 93 HP in mile tune .

    The XR actually has several advantages besides just "rotating mass" . First , the XR has a falling torque curve , they make max torque at about 5000 RPM's , roughly 55 % of max engine speed , from there the torque falls at a fairly steady rate . Even mighty Honda learned this lesson in GP and superbike motors from the pre electronic era . Second , the narrow angle V configuration , where the "bangs" occur 45 degrees apart , followed by 715 degrees of crankshaft rotation before the next bang . Why does this matter , well , every time a power pulse is delivered to the rear tire , the tire deforms slightly , the long wait between the two pulses allows the tire to regain its shape , and regain traction . Once again , another lesson learned by Honda , and other GP and Superbike competitors . The big bang and cross plane crankshaft layouts are a direct result of this lesson . The Ducati twins and the V4 Aprilia engine raced in SBK also benefit from this traction advantage .
    Dessert Storm and Rich B like this.