Greg Coen Motor Co. Dyno Page


Here we will show dyno runs that we have performed on Harley's and even other brands of motorcycle's. We will make note on bikes we have tuned.

100hp Dresser

Tuned

100" Bagger

95" Softail - EFI

95" Dyna

SERG Before and After

88" EFI

FXDX 1

95" EFI

FXDX 2 vs.DWG Comparo

Stage1TC

SE Road Glide vs. Std. Road Glide Comparo

'00 Buell X1

Ultra Cycles Rigid 113"

Mo's 79" XL Dragster

Aprilia RSV1000 Mille

'00 Polaris Victory

Note: We dyno all bikes with a rider sitting on the bike, with proper tire pressure and in a uncontrolled environment . All were ran in a 4th gear roll-on. All have stock gearing unless otherwise noted.

100hp Bagger


This is a '00 95" FLHRCI. Bolt in stuff, nothing radical. Total sleeper.
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Before and after a tune


This is a 80" Evo Softail. It has the normal bolt-in cam, air cleaner kit w/ slip-ons. He thought it ran good before he let us tune it. Red is before and green is after. We end up getting more out of most of the bikes we tune.
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100" Bagger


This is a 100" Evo-based motor one of our tech's, Rob, put together. It's in his daily ridden '89 Bagger
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TC 95" Softail - EFI


This is a 95" Twin Cam Softail with fuel injection. All bolt in components and nothing radical.
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TC 95" Dyna


This is a 95" Twin Cam Dyna that a customer put together with components we sold him. He ran up from the Bay to have us tune it and he did good! Hey, Roger.
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SERG Before and After


Green lines are with the SE stage 2 kit, Hooker slip-ons and mapped PC2. Red lines are after we re-worked the heads, throttle body and cams. More upper rpm power could be achieved by getting rid of the bagger header. It is good for looks and that is about all.
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88" EFI bagger


This a 88ci Ultra. Stock pistons and cylinders and throttle body. It has bolt-in cams and bolt-on heads with Hooker slip-ons SE air cleaner and mapped PC2. We finally got a hold of a 2-1 Hooker exhaust and will install it to see the difference between header systems.
Coming Soon!
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'99 FXDX


Blue lines are stock (59 h.p. and 72 ft. lbs.).

Red lines are the modified bike in 1450cc form and 9.0:1 compression (88 h.p. and 94 ft. lbs.).

Green and Black lines are the same bike only in 1550cc size with 9.3:1 compression (92 h.p. and 103 ft. lbs.).
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'99 FLHTCUI


This is a dyno run on our new 250 model. The heads and throttle body have been modified, bolt-in cams, 1550cc w/ 9.5:1 comp., Power Commander 2, and Hooker mufflers. The lower graph is the fuel curve. The low end dip is not felt when riding. This is due to 100% (wide open) throttle at low rpm's. Here, The EFI reads that there is alot of air and goes lean (dip) then compensates by adding fuel. The Dyno picks this up because of its sensitivity and is NOT felt on the street. This bike accelerates at all RPM's. Carbs have circuits (low/mid/high) and the dips do not show up.
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'99 FXDWG vs. '99 FXDX


This graph compares a FXDWG (red lines) and a FXDX (green lines and a different bike than the one on our 1st graph). The DWG has the same package as the FXDX on the 1st graph above EXCEPT for 9.8:1 compression and TW50 cams. The FXDX has 95" w/10.5:1 compression, modified cylinder heads, TW60 cams, Mikuni HSR42 carb w/Hypercharger, S.E. slip-ons, 7000 rpm module, Nology wires, H-D clutch upgrade and tuned by owner.
Which would you want?
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'00 FLHRI


This is what our Stage1TC has produced. Compare to H-D stage 1 and see the advantage. Remember, the dip is caused by the 100% throttle at low rpm's. No one has complained of a low end torque loss.
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SE Road Glides vs. Std Road Glide


All 3 of these bike have SE air cleaners, PC2's and have been mapped by us. The Green is a SERG w/ Hooker slip-ons, the Pink (high # run) is a SERG w/ a 2-1 Thunderheader. The Red is a Std. Road Glide with a 2-1 Thunderheader. Look at the difference, 5 h.p. and 8 ft.lbs with SE cams and 1550 big bore. Not alot! Call us.
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'00 Buell X1


The Green run has the race kit from Buell. It includes a exhaust and efi chip. The green air fuel ratio is way to rich and fuel economy has suffered. This bike needs a Power Commander so the fuel curve can be set where it should be. The Red is in stock form.
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'99 Ultra Rigid 113"


This is a 113" S&S motor with the right cam, ignition, exhaust (Hooker 2-1) and tuned by us. The break in lines is caused by the dyno's sensitivity. It did not affect riding, nor did we consider it a problem.
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Mo's 79" XL Dragster


This is a 79" Sportster based drag bike. A picture of it is on our Racepage. It hase S&S/GCMC heads, 11.5:1 compression, GCMC Super G carb, and Red Shift .575 lift cams. Not much power under 5,000 but it is a drag bike.
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Aprilia RSV1000 Mille


Aprilia's are made in Italy. They are 60 degree, counterbalanced V-Twin. This has a full race exhaust and efi chip. Very cool looking sportbike. The dips are caused by a rich condition at that rpm. It also needs a Power Commander.
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'00 Polaris Victory


This a stock Polaris Victory. A air cleaner, mufflers and PC2 are on order.
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More to come...

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