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Old 05-29-2014, 04:37 PM   #151
gdsob
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Quote:
Originally Posted by Calkins View Post
AMA encourages slipper clutches, for safety reasons.

This is the list of approved bikes that are currently being manufactured. Some people are using older bikes that are approved, case by case.

Singles Bikes;

Honda 2009-2014 CRF450R
Kawasaki 2006-2014 KX450F
KTM 2009-2014 450 SX-F
KTM 2012-2014 450 SX-F FE
KTM 2009 450 XC
Suzuki 2009-2014 RM-Z450
Yamaha 2009-2014 YZ450F

Twins Engines;

Aprilia: RSV 1000, 550
BMW: FS 800 GT/ GS / R
Buell: CR1125 / XBR / 1200
Ducati: 748, 848, other air cooled
H-D: XR 750 / XR1200 / 883
Honda: RS 750 / NC700X
Kawasaki: 650 Ninja
KTM: 990 Super Duke
Suzuki: SV / DL 1000, SV 650
Triumph: Bonneville Scrambler, America, Speedmaster
Yamaha: Tenere 750 / Super Tenere 1200 / Bolt
Anyone looking at the HD Street 750 yet? That engine looks like it has some potential.
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Old 05-29-2014, 06:56 PM   #152
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Originally Posted by gdsob View Post
Anyone looking at the HD Street 750 yet? That engine looks like it has some potential.
I'll bet H-D has one in Bill Werner's capable hands. Didn't he put the Kawie 650 on top?
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Old 05-29-2014, 09:11 PM   #153
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Originally Posted by ADK View Post
I'll bet H-D has one in Bill Werner's capable hands. Didn't he put the Kawie 650 on top?
I don't think it's Big Bill, but I'm certain someone is working on an XG750 based dirt tracker.
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Old 05-29-2014, 10:17 PM   #154
Calkins
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The word on the street is that HD has five XG framers being tested already. Bill is a Kaw man now, and has been for many years.
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Old 05-31-2014, 04:45 PM   #155
PeteN95
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Quote:
Originally Posted by nachtflug View Post
Would a twingle and a 180 firing of the same engine have significant differences in power?
The idea is to improve grip by giving a longer gap between power pulses and allowing the tire to regain traction during a slide. It is a similar idea to the "Big Bang" engines in MotoGP, where they would fire all 4 cylinders very close together. It was hard on the crank, but it made the bike (comparatively) easy to ride while sliding.
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Old 06-02-2014, 04:04 PM   #156
never2old4fun
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Quote:
Originally Posted by PeteN95 View Post
The idea is to improve grip by giving a longer gap between power pulses and allowing the tire to regain traction during a slide. It is a similar idea to the "Big Bang" engines in MotoGP, where they would fire all 4 cylinders very close together. It was hard on the crank, but it made the bike (comparatively) easy to ride while sliding.
Sounds like you are speaking of a twingle to me, but I think they outlawed those.
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Old 06-04-2014, 01:35 PM   #157
gdsob
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Originally Posted by Calkins View Post
The word on the street is that HD has five XG framers being tested already. Bill is a Kaw man now, and has been for many years.
I couldn' get the images to upload, check these out:

http://photos.prnewswire.com/feature...20140604/94119
http://photos.prnewswire.com/feature...20140604/94118

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Old 06-04-2014, 01:58 PM   #158
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Quote:
Originally Posted by gdsob View Post


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Old 06-13-2014, 10:21 PM   #159
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knoxville winnners friday night

this just in
vintage pro tWin

kk#38k
kansas
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Old 06-15-2014, 11:58 AM   #161
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Knoxville races live streaming:

http://www.fanschoice.tv/watch-live/ama/flat-track
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Old 06-15-2014, 07:14 PM   #162
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Looks like the "old airheads" are not dead yet on the 1/2 miles.... First 6 on HDs per AMAProRacing. I see no Ducati under JJs' name at Knoxville . Says he was on an HD. Nothing has changed as long as the track is shorter than a mile and the schedule favors 1/2 mile races. The Kawasakis are in trouble still/again.
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Old 06-15-2014, 08:17 PM   #163
stk0308
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Quote:
Originally Posted by buls4evr View Post
Looks like the "old airheads" are not dead yet on the 1/2 miles.... First 6 on HDs per AMAProRacing. I see no Ducati under JJs' name at Knoxville . Says he was on an HD. Nothing has changed as long as the track is shorter than a mile and the schedule favors 1/2 mile races. The Kawasakis are in trouble still/again.
Pictures from the event have Jake Johnson running a Kawi for a bit, then racing a XR. No sign of the Ducati. A real shame. Glad to see Shana make a final. It's the first step to being competitive. No Johnny Lewis?
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Old 06-19-2014, 07:50 PM   #164
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..jl#10 testin' & tuning for lima..


..
and dave waters getting her dialed in..
roooooOOST.
kk#38k
vintage
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Old 06-28-2014, 05:30 PM   #165
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Love that photo of JL10 ^^^. Watching the live stream from the cushion at Lima, OH. Excellent racing in the heats. Looking forward to the mains.



http://www.fanschoice.tv/watch-live/ama/flat-track

Here is a list of things that are better than a cushion track:





























.
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