Something for the big bikes to shoot for
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Something for the big bikes to shoot for

This is a discussion on Something for the big bikes to shoot for within the Vintage Motorcycle Racing forums, part of the Caferacer.net Forums category; Heres my lap times for the last NHIS (main track) race last year. Lap times are the only way to really tell if what you ...

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  1. #1
    Moderator jbranson's Avatar
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    Something for the big bikes to shoot for

    Heres my lap times for the last NHIS (main track) race last year. Lap times are the only way to really tell if what you are doing or not doing is making you go faster.
    These are all riding my 175. First 5 laps were a morning practice...damp if I remember correctly.
    Hoping to break into the 1:30 flat range with the changes made last year prior to Frontier. It ain't no RS125...but it's not bad for a 400 lbs bike/rider package with 23hp.


    9/5/2005 9:53 NHIS 41 1 01:47.6 75 F
    9/5/2005 9:55 NHIS 41 2 01:43.8
    9/5/2005 9:57 NHIS 41 3 01:45.9
    9/5/2005 9:58 NHIS 41 4 01:38.2
    9/5/2005 10:00 NHIS 41 5 01:37.8 *
    9/5/2005 13:16 NHIS 42 1 01:32.7 * 82 F
    9/5/2005 13:18 NHIS 42 2 01:33.3
    9/5/2005 13:20 NHIS 42 3 01:33.9
    9/5/2005 13:21 NHIS 42 4 01:34.8
    9/5/2005 13:23 NHIS 42 5 01:34.2
    9/5/2005 13:24 NHIS 42 6 01:34.5
    9/5/2005 13:26 NHIS 42 7 01:34.7
    9/5/2005 16:22 NHIS 43 1 01:33.8 83 F
    9/5/2005 16:23 NHIS 43 2 01:33.7
    9/5/2005 16:25 NHIS 43 3 01:33.0 *
    9/5/2005 16:26 NHIS 43 4 01:33.6
    9/5/2005 16:28 NHIS 43 5 01:34.3

    JohnnyB



  2. #2
    paced_haste's Avatar
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    I calculate that to be about 17.4lbs/hp.
    I don't know how much Pete's bike weighs, but I figured around 300lbs. If the bike was making 40hp, that puts my ratio at about 12.5lbs/hp. That's a pretty significant difference.
    I guess my point is, 32.7 aint bad. Props to Johnny.

    Z


  3. #3
    Moderator jbranson's Avatar
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    Power to Weight...that's what it's all about baby!
    I base all my modification decisions on how it effects power to weight. I'd rather drop 15 lbs of weight than have 1 more hp. Both probably have about the same effect...but less weight means better handling, better accleration and more reliability when you don't try to squeeze more power out of an already over stressed engine.

    Unfortunately the bike only has about four more lbs it can lose without going to a freakin titanium frame or something.
    JohnnyB


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