Document:

EXHIBIT 4.5

                            VIPER MOTORCYCLE COMPANY

NO. W-

                               WARRANT CERTIFICATE

                     CERTIFICATE FOR ______________ WARRANTS

                          THIS DOCUMENT CERTIFIES THAT

                            ========================

or registered  assigns is the owner of that number of Warrants  specified above,
of which each one  entitles  the holder  thereof to purchase  one fully paid and
nonassessable  common share,  subject to adjustment as provided herein, of Viper
Motorcycle  Company,  a Minnesota  Corporation (the "Company") at any time after
the date  hereof at an exercise  price equal to the price of the Initial  Public
Offering.

Each such Warrant may be  exercised  on any  business day before the  Expiration
Date  hereof  which is three (3)  years  after  the date of the  Initial  Public
Offering,  and the  holder  hereof or any  assigns,  as the case may be,  hereby
acknowledges  that the  restricted  common stock to be issued  underlying  these
Warrants constitutes "restricted securities" as defined under the Securities Act
of 1933,  as amended.  The Company is under no obligation to register any common
shares  underlying  these Warrants,  and  accordingly the holder hereof,  or any
assigns, recognize that any common stock purchased incident to exercise of these
Warrants will be purchased as a Long-term investment with no present view toward
resale,  transfer or other  disposition  thereof.  Upon  payment of the exercise
price for any common shares underlying these Warrants,  all of such shares shall
be legally and validly issued and fully paid and non-assessable.

The Warrants  represented hereby are exercisable upon presentation and surrender
of this Warrant  Certificate,  with the election to purchase  duly stated by the
holder hereof in writing, at the corporate office of the "the Company,  and upon
payment  to the  Company of the  Warrant  exercise  price for such  shares in US
Dollars in cash or other valuable consideration equal to such exercise price."

These  Warrants are  exercisable  at the election of the holder  hereof,  or any
assigns,  either  in whole or in p art  anytime  or from  time to time up to the
number of shares specified  above.  Such shares shall be deemed issued as of the
date of surrender of the Warrant  Certificate  and receipt of the Company of the
exercise price therefore. In the event this Warrant Certificate is exercised for
less  than all of the  underlying  shares  of this  Warrant  Certificate,  a new
Warrant  Certificate  shall be issued to the holder or any assigns on  surrender
hereof for the number of shares  represented  by the Warrants not yet exercised.
The Company shall not be required to issue any

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<PAGE>

VIPER MOTORCYCLE COMPANY                                     WARRANT CERTIFICATE

fractional  shares incident to any exercise of these Warrants,  but rather shall
round off any exercise hereof to the nearest common share of the Company.

These  Warrants are being issued to the initial  holder  hereof  incident to the
terms of a Series A 16%  Convertible  Secured  Note of the Company  purchased by
such holder incident to a private placement of such Notes by the Company.

Prior to any exercise of any Warrants  represented  hereby, the holder hereof or
any assigns shall not be entitled to any rights of a stockholder of the Company,
including  without  limitation  the right to vote or receive  dividends or other
distributions.

The purchase price, the number of shares  purchasable upon exercise hereof,  and
the number of Warrants outstanding anytime during the term hereof are subject to
adjustment  from  time and time on the  occurrence  of any  event  such as stock
dividends, stock splits (forward or reverse), reorganizations, recapitalizations
or  consolidations,  mergers or other business  combinations,  or any other such
events, so that the holder hereof of any Warrants  exercised after such event or
events  shall be entitled to receive  the number and price of shares  which,  if
such Warrants had been exercised immediately prior to such event or events, such
holder  would  have  owned.   Such  adjustment  or  adjustments  shall  be  made
successively whenever any such event shall occur.

This Warrant  Certificate and these Warrants and underlying common shares of the
Company have not been registered  under any federal or state  securities laws an
they cannot be  transferred,  resold or  otherwise  disposed of unless they have
been  registered  under relevant  securities laws or they satisfy an appropriate
exemption from such registration. This restriction shall also be clearly affixed
to any common share  certificates of the Company issued incident to the exercise
hereof.

Prior to presentment for transfer of any of these Warrants to the Company by the
holder,  the  Company  may treat and deem the  registered  holder  hereof as the
absolute holder of these Warrants for all purposes, and the Company shall not be
affected by any notice to the contrary.  These  warrants are granted  piggy-back
registration rights to any future offering or registration statement,  excluding
the Initial Public Offering.

This Warrant  Certificate and each Warrant  represented hereby shall be governed
and construed by the laws of the State of Minnesota.

EXECUTED duly by the Company on the day and year first stated herein.

                                             VIPER MOTORCYCLE COMPANY

                                             By ________________________________

                              * * * * * * * * * * *

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VIPER MOTORCYCLE COMPANY                                     WARRANT CERTIFICATE

                                 ASSIGNMENT FORM

       To  Be   Executed   By  the   Registered   Holder   Hereof  to   transfer
       Warrants__________________  FOR VALUE RECEIVED,  the  undersigned  hereby
       sells,  transfers  and  assigns  of  the  Warrants  represented  by  this
       Certificate  to and does hereby  irrevocably  constitute  and appoint the
       Secretary  of Viper  Motorcycle  Company as  Attorney  to  transfer  this
       Warrant  Certificate  on the  records of the  Company  with full power of
       substitution in the premises.

       Dated: _________________________           ______________________________
                                                  Signature(s)

                                                  ______________________________

                                    Page -3-EXHIBIT 4.6

                            VIPER MOTORCYCLE COMPANY

                                  AMENDMENT TO

                      SERIES A 16% CONVERTIBLE SECURED NOTE

Serial No. __-A                                               [Date of Issuance]

                         Principal Amount: $___________

       The parties hereto entered into a Promissory Note (Series A 16%
Convertible Secured Note), dated _____________ with Viper Motorcycle Company as
the Maker and the undersigned Note Holder, __________, in the original principal
amount of $___________.

       FOR VALUABLE CONSIDERATION:

       Maker and Note holder hereby agree to the following amendments to the
terms of such Note:

       (1)    The maturity of the Note is eighteen (18) month's after the date
              of the Note, with no earlier maturity option as had been
              originally stated in the Note.

       (2)    The conversion rights set forth in Section 8 of the original Note
              shall be replaced as follows:

              CONVERSION RIGHTS. The principal of this Note shall be convertible
              into common stock of Maker anytime, and from time to time, at the
              option of the Note holder, at the rate of one share of common
              stock of Maker for each $2.50 principal hereof; provided however,
              that in the event Maker obtains an effective date from the SEC for
              its proposed IPO. These conversion rights shall terminate 150 days
              after such SEC effective date.

              Upon any conversion hereof, only principal shall be converted and
              any accrued interest shall be paid to Note holder in cash, unless
              upon such conversion date both parties hereto agree in writing to
              also convert such accrued interest amount.

       (3)    All other terms and conditions of the original Note shall remain
              in full force and effect.

<PAGE>

       IN WITNESS WHEREOF, this Note Amendment was executed by the parties'
       hereto effective ________ , 2004.(1)

                                            VIPER MOTORCYCLE COMPANY

                                            /s/
                                            ------------------------------------
                                            Maker

                                            /s/
                                            ------------------------------------
                                            Note Holder

----------
(1)    Effective with respect to David W. Palmlund, III on March 18, 2004, with
       respect to Keith Hoffmann on April 30, 2004 and with respect to Ed
       Creel III on April 30, 2004.EXHIBIT 4.7

                            VIPER MOTORCYCLE COMPANY
                            SERIES B - 18% BRIDGE NOTE

Serial No. 1                                            Dated: February 20, 2004

                           Principal Amount: $400,000

       VIPER MOTORCYCLE COMPANY, a Minnesota corporation (hereinafter "Maker"),
for value received, hereby promises to pay to the order of: Palmlund Ltd. at the
address designated below, or to any registered transferee (hereinafter "Note
Holder"), the principal sum of $400,000.00, on the earlier of (i) that date
which is within 21 days of the effective date of the Initial Public Offering
(IPO) of Maker, or (ii) that date which is six (6) months after the above-stated
date of this Note, together with interest from the issuance date hereof until
all principal is paid in full at the rate of Eighteen Percent (18%) per annum,
in lawful money of the United States of America.

1.     PART OF CLASS. This Note is one of an issue of Series B 18% Bridge Note.

2.     FUNDING OF PRINCIPAL. Funding from Note Holder to Viper (Maker) shall be
       as follows: As needed and requested by Maker.

3.     PAYMENT OF INTEREST. Interest shall be paid monthly during the term
       hereof, provided that the term of this Note has not ended prior thereto
       due to the early payment from the proceeds from a public stock offering.
       Interest Payments are due at the beginning of each month.

4.     ADDITIONAL PRINCIPAL, IF NEEDED. Lender will make available additional
       funds, up to $100,000 with the same terms of this Series B Bridge Note,
       if needed by Maker.

5.     ACCELERATION OF MATURITY. In the event of any bankruptcy, liquidation,
       dissolution or any other insolvency of Maker, then the Noteholder may
       declare the entire principal and any accrued interest due and payable
       immediately without further notice, demand or presentment.

6.     SECURED STATUS OF NOTE. This Note is secured and collateralized, along
       with all other Notes in its class, by hereby assigning to Noteholders of
       such Notes a new security interest in the new 100 cubic inch, forty-five
       degree V-Twin prototype engine, intellectual property and goodwill
       related hereto, including CAM production machine drawings, instructions
       and detailed CAD drawings.

7.     OBLIGATION OF MAKER. This Note shall constitute a binding obligation of
       the Maker until satisfied in full.

8.     INVESTMENT INTENT OF NOTEHOLDER. Noteholder hereby acknowledges and
       represents that Noteholder has acquired this Note for investment and
       without any present view toward resale, transfer or other disposition
       thereof, and that no transfer of this Note will be valid unless made in
       compliance with relevant securities laws restrictions.

<PAGE>

SERIES B - 18% BRIDGE NOTE                                     FEBRUARY 20, 2004

9.     COVENANTS OF MAKER. The Maker hereof agrees that for so long as this Note
       or any portion hereof is outstanding, the Maker will:

       i.     Maintain and preserve its corporate existence and all rights,
              franchises, and other authority adequate for the effective conduct
              of its business; maintain its properties, equipment, facilities
              and intellectual property in good status, order and repair; and
              conduct its business in an orderly manner without voluntary
              interruption.

       ii.    Maintain adequate insurance including public liability, property
              damage, fire and other hazards with responsible insurance carriers
              sufficient to protect all property and business operations of
              Maker.

       iii.   Pay and discharge, prior to becoming delinquent, all taxes,
              assessments and governmental charges upon or against the Maker or
              its properties, except to the extent and so long as any of such
              liabilities are being contested by Maker in good faith.

       iv.    Promptly notify Noteholder in writing of any event of default
              hereunder.

       v.     Shall not make any loans or advances to any person or party unless
              in the ordinary course of business, and shall not incur any
              material mortgage, pledge, encumbrance or lien against any
              property of Maker unless for a valid business purpose.

       vi.    Shall not sell, lease, assign or transfer any substantial part of
              its business or fixed assets or intellectual property unless
              consented to in writing by Noteholder.

10.    EVENT OF DEFAULT. The following shall be a default on this Note by Maker:

       i.     Maker shall fail to make any payment of interest or principal to
              Noteholder when due under the terms hereof; or

       ii.    Maker shall fail materially to comply with the covenants of Maker
              contained herein and such default shall remain uncured for 30 days
              after written notice thereof from Noteholder to Maker.

11.    REMEDY ON DEFAULT. In the event of any default hereunder, Noteholder
       shall have the option to declare the entire principal amount hereof plus
       any accrued interest hereon to be immediately due and payable without
       further notice, demand, presentment for payment, notice of intention to
       accelerate or acceleration. Maker hereby guarantees payment of this Note
       and waives demand for payment, presentment for payment, notice of
       non-payment, protest, notice of protest, notice of dishonor, notice of
       acceleration of maturity, and any other similar notices. Maker further
       agrees to pay all costs and expenses of collection incurred by
       Noteholder, including reasonable attorney's fees.

12.    TRANSFER. This Note may not be sold, pledged or otherwise transferred to
       any person other than an "accredited investor" as that term is defined in
       Regulation D of the Securities Act of 1933. Any authorized transfer of
       this Note shall be made only by surrendering this Note duly endorsed to
       Maker for cancellation, together with the

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SERIES B - 18% BRIDGE NOTE                                     FEBRUARY 20, 2004

       Noteholder's instructions to Maker that a replacement Note of like
       principal amount shall be issued to such qualified transferee.

13.    GENERAL. Noteholder shall not have by any act, delay, omission or
       otherwise be deemed to have waived any of Noteholder's rights or remedies
       set forth herein, and no waiver of any kind shall be valid unless in
       writing and signed by Noteholder. This Note has been executed in the
       State of Minnesota and shall be construed and governed by the laws of
       Minnesota. No modification or amendment of this Note shall be effective
       unless made in writing and signed by both Maker and Noteholder. This Note
       shall be binding upon any successors or assigns of Maker, provided also
       that Maker shall not assign its obligations under this Note without the
       written consent of Noteholder.

14.    NOTICES. All demands and notices to be given hereunder shall be delivered
       or mailed to Viper Motorcycle Company, c/o Garry Lowenthal, CFO or John
       Lai, VP of Corporate Development at 5733 Industrial Parkway, New Hope, MN
       55428 (or at such substituted address notified to Noteholder by Maker);
       and in the case of Noteholder to the address written below (or at such
       substituted address notified to Maker by Noteholder).

IN WITNESS WHEREOF, the Maker has caused this Note to be signed by its duly
authorized officer as of the aforesaid date of issuance.

                                          VIPER MOTORCYCLE COMPANY

                                          By /s/ John L. Fiebelkorn
                                          --------------------------------------

                                          Its           CEO
                                             -----------------------------------

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SERIES B - 18% BRIDGE NOTE                                     FEBRUARY 20, 2004

AGREEMENT OF NOTEHOLDER:

Noteholder hereby confirms and agrees to any representations made in writing by
Noteholder in this document.

                                        ----------------------------------------
                                                         Signature of Noteholder

                                       -----------------------------------------
                                                        Joint Noteholder, if any

                                       -----------------------------------------
                                          Printed or Typed Name of Noteholder(s)

                                       -----------------------------------------
                                                           Address of Noteholder

                                       -----------------------------------------
                                       City                  State           ZIP

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