From: car377@druhi.ATT.COM (RogersC)
Newsgroups: rec.motorcycles.harley
Subject: Re: EVO peak HP & Torque specs
Summary: Real world numbers
Date: 25 Dec 92 04:06:10 GMT

In article <BzqJ5q.9pt@cmptrc.lonestar.org>, neal@cmptrc.lonestar.org (Neal Howard) writes:
> In article <y3r2x+a@rpi.edu> root@june.cmp.rpi.edu (J.R. Ordon) writes:
> >Anybody out there have the Peak HP and Torque specs for the
> >EVO sporty's?  883 & 1200 if possible.
> >And also a spec comparison to a Jap bike, such as the CB750 Nighthawk??
> 
> The 1991 models XLH-1200 has 68 horsepower and the XLH-883 has 53. These figures
> are pretty accurate but off the top of my head. I have the factory service
> manual at a friends house (about 150 miles from where I live) but I am going
> there over the Xmas holiday and next week I'll post the exact hp/torque/rpm 
> figures. BTW, I had posted them to rec.motorcycles a couple months ago so if
> anyone has old archives of r.m, it should be in there somewhere, anyway I'll
> post them again after I return from the holidays.

The numbers from the factory service manuals are not comparable to anything, and
are, in fact, meaningless to anyone except those factory people who happen to
have intimate knowledge of the measurements that produced those numbers.  The
notion of an "exact" figure is bogus unless the figure is accompanied by the 
requisite dozen or so parameters and test conditions, any one of which can cause 
the "exact" figure to vary significantly.  Even if the FSM specifies all of the
test conditions and parameters that make the HP/Torque number meaningful, the
number is *still* not comparable to any other bike's number, unless that bike 
is subjected to the *same* exact test conditions to produce the comparison numbers.

Below are some numbers from "Cycle" magazine which are meaningful and repeatable.  
The power and torque measurements were taken at the rear axle on the Kerker Superflow 
Dyno using standardized (and published) methods and procedures.  Couldn't find the 
Nighthawk (Blaine?) but I included the Zephyr (ZR750C1) since it is a similar bike.

Notes on abbreviations:
   N/A = Not available
    w  = Curb weight w/full tank of gas.
    +  = Comparison test in same issue as a road test of the same bike.
   1/4mile_t@v = 1/4 mile time at terminal speed.
   T   = Torque (maximum measure value)
   BHP = Brake Horsepower (maximum measure value)
45-70(3) = 3rd Gear Roll-on from 45mph to 70mph. Listed as time and distance
           required to get to 70 mph without shifting gears.
45-70(4) = 4th Gear Roll-on from 45mph to 70mph. Listed as time and distance
           required to get to 70 mph without shifting gears.
45-70(5) = 5th Gear Roll-on from 45mph to 70mph. Listed as time and distance
           required to get to 70 mph without shifting gears.
    *  = Not a 5-speed transmission.  Either 2/3/4 or 4/5/6 gear intended
         rather than 3/4/5.

MODEL       Make Weight 1/4mile_t@v  0-60 45-70(3) 45-70(4) 45-70(5)   BHP   T(ft-lb)
--------    ---- ------ ------------ ---- -------- -------- --------  ------ -------- 

XLH883*(87)  HD  478.0w 14.24@89.40  4.96   N/A    5.02@435 7.33@631   46.12 47.44
XLH1200*(90) HD  491.0w 13.15@96.79  4.15 3.55@305 4.55@384 6.15@529   50.4  62.1 
ZR750C1*(91) Kaw 483.0w 12.09@106.11 3.40 2.75@236 3.80@320 5.05@433   59.5  39.4 

VF1100S*(84) Hon 603.0w 11.20@121.69 3.04 3.12@273 3.84@336 5.12@450  101.98 64.43
VF1100S*(85) Hon 603.0w 11.23@122.61 N/A  3.44@292 4.24@361 5.84@491   93.70 62.60
FZR1000T(87) Yam 524.5w 10.71@127.14 2.64 2.72@231 3.12@255 3.44@290  122.09 62.94
FZR1000W(89) Yam 522.0w 10.8@129.14  2.85 2.85@243 3.7@311  4.3@366   114.94 65.55
ZX1000R*(86) Kaw 591.5w 11.08@122.95 2.88 6.00@442 7.68@563 8.24@625  105.24 63.10
RR1200+(89)  Bue 490.5w 12.90@100.85 4.1  2.85@247 3.2@274  4.3@368    56.09 63.87
FJ1100L(84)  Yam 571.0w 11.07@124.79 3.04 2.88@247 3.68@327 4.48@392  102.21 64.39
FJ1200(86)   Yam 579.0w 10.78@127.07 2.80 2.88@232 3.28@273 3.92@326  101.31 67.50
GSX1100FK(89)Suz 602.5w 10.93@124.85 2.85 2.55@214 3.30@279 4.05@341  101.69 59.35
GSXR1100(86) Suz 503.5w 10.85@N/A    2.96 2.80@235 3.60@295 4.96@400   89.49 57.16
GSXR1100(89) Suz 531.5w 10.80@125.06 2.9  2.65@226 3.25@275 4.10@346  108.41 65.42
ZL1000*(87)  Kaw 595.5w 11.14@119.21 2.88 2.56@217 3.04@258 3.52@297   85.91 57.06
VMX12N(85)   Yam 618.5w 10.99@124.04 2.88 2.48@209 3.36@285 4.16@350  119.08 76.82
ZX10 *(88)   Kaw 578.0w 10.71@128.62 2.65 3.1@264  4.2@352   5.1@428  118.61 65.70

Chuck Rogers
car377@druhi.att.com
Newsgroups: rec.motorcycles.harley