UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

OF THE SECURITIES EXCHANGE ACT OF 1934

May 20, 2019

(Commission File No. 1—13522)

CHINA YUCHAI INTERNATIONAL LIMITED

(Translation of registrant’s name into English)

16 Raffles Quay #26-00

Hong Leong Building

Singapore 048581

(Address of registrant’s principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F  ☒                 Form 40-F  ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101 (b) (1):

Yes  ☐            No  ☒

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101 (b) (7):

Yes  ☐            No  ☒

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes  ☐            No  ☒

EXHIBIT INDEX

2

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereto duly authorized.

Date: May 20, 2019

3

Exhibit 99.1

NOTICE OF ANNUAL GENERAL MEETING

CHINA YUCHAI INTERNATIONAL LIMITED

To all Shareholders

NOTICE IS HEREBY GIVEN that the Annual General Meeting (the “Meeting”) of CHINA YUCHAI INTERNATIONAL LIMITED (the “Company”) will be held at New World Millennium Hong Kong Hotel, 72 Mody Road, Tsim Sha Tsui East, Kowloon, Hong Kong on Friday, June 21, 2019 at 9.00 a.m. (Hong Kong time) for the following purposes:

As Ordinary Business

By Order of the Board

Hoh Weng Ming

President

Date: May 20, 2019

Notes:

Exhibit 99.2

VOTE BY INTERNET—www.proxyvote.com Use the Internet to transmit your voting instructions and for electronic delivery of information up until 9:00 p.m. Eastern Time on Tuesday, June 18, 2019. Have CHINA YUCHAI INTERNATIONAL     your proxy form in hand when you access the web site and follow the instructions CHINA YUCHAI INTERNATIONAL to obtain your records and to create an electronic voting instruction form. 16 RAFFLES QUAY #26-00 HONG LEONG BUILDINGvote BY PHONE—1-800-690-6903 SINGAPORE 048581Use any touch-tone telephone to transmit your voting instructions up until SINGAPORE 0485819:00 p.m. Eastern Time on Tuesday June 18, 2019. Have your proxy form in hand when you call and then follow the instructions. VOTE BY MAIL Mark, sign and date your proxy form and return it in the postage-paid envelope we have provided or return it to Vote Processing, c/o Broadridge, 51 Mercedes Way, Edgewood, NY 11717. TO VOTE. MARK BLOCKS BELOW IN BLUE OR BLACK INK AS FOLLOWS: _ E80364-P26093 KEEP THIS PORTION FOR YOUR RECORDS THIS PROXY FORM IS VALID ONLY WHEN SIGNED AND DATED. DETACH AND RETURN THIS PORTION ONLY CHINA YUCHAI INTERNATIONAL LIMITED For Withhold For AllTo withhold authority to vote for any individual The Board of Directors recommends you vote FOR All All Exceptnominee(s) mark “For All Except’ and write the the following: number(s) of the nominee(s) on the line below, To re-elect the following Directors retiring pursuant to Bye-law 4(2) of the Bye-laws of the Company to hold office until the next Annual General Meeting of the Company: Nominees: 01)MrKwek Leng Peck 06)Mr Han Yiyong 02) Mr Gan Khai Choon 07)Mr Ho Raymond Chi-Keung 03) Mr Hoh Weng Ming 08)Mr Tan Eng Kwee (appointed on February 22, 2019) 04)Mr Neo Poh Kiat 09)Mr Xie Tao (appointed on April 110, 2019) 05) Mr Yan Ping The Board of Directors recommends you vote FOR the following proposals:For Against Abstain To receive and adopt the audited financial statements and independent auditors’report for the financial year ended December 31,2018, OOO To approve an increase in the limit of the Directors’ fees as set out in Bye-law 10(11) of the Bye-laws of the Company from US$250,000 to US$490,000 for O O O the financial year 2018 (Directors’ fees paid for FY 2017: US$490,000). To authorize the Board of Directors to appoint up to the maximum of 11 Directors or such maximum number as determined from time to time by the â–¡ â–¡ â–¡ shareholders in general meeting to fill any vacancies on the Board. To re-appoint Ernst S Young LLP as independent auditors of the Company and to authorize the Audit Committee to fix their remuneration. â–¡ â–¡ â–¡ For address changes and/or comments, please check this box and write them on the back where indicated. Please sign exactly as your name(s) appear(s) hereon within the box. When signing as attorney, executor, administrator, or other fiduciary, please give full title as such. All holders must sign. If a corporation or partnership, please sign in full corporate or partnership name by authorized officer. Signatured Shareholder/Common Seal (Please Sign Within Box| Date Signature of Shareholder/Common SealDate

IMPORTANT—Please read the following notes before completing this form You may appoint a proxy who need not be a Member of the Company by inserting the proxy’s name on this proxy form in the space provided. If you do not enter a name in the space provided, the Chairman or such other person as he may designate will be authorized to act as your proxy. A member is entitled to appoint one or more proxies to attend and vote in his stead. Where a member appoints more than one proxy the appointments shall be invalid unless he specifies the proportion of his shareholding (expressed as a percentage of the whole) to be represented by each proxy. For ease of administration, we would request members not to appoint more than two proxies. The Company shall be entitled to reject a proxy form which is incomplete, improperly completed or illegible. If the true intentions of the appointor are not ascertainable from the instruction of the appointor specified on the proxy form and in relation to any other matter which may come before the Meeting, the proxy shall be entitled to vote in his/her discretion. In the case of a corporation, this proxy must be executed under its common seal or under the hand of an officer or attorney or other person duly authorized to sign. To be valid, this proxy and the power of attorney or other authority (if any) under which it is signed, must be lodged with the Company at 16 Raffles Quay, #26-00 Hong Leong Building, Singapore 048581, Republic of Singapore OR Vote Processing, c/o Broadridge, 51 Mercedes Way Edgewood, NY 11717 not less than 48 hours before the time appointed for the Meeting, that is no later than 9.00 a.m. on Wednesday June 19,2019 (Singapore Time) or 9,00 p.m. on Tuesday June 18,2019 (New York Time). In the case of joint holders of any share, this proxy may be signed by any one of such joint holders. At the Meeting, the vote of the senior holder who tenders a vote, whether in person or by proxy, shall be accepted to the exclusion of the votes of the other joint holders and for this purpose seniority shall be determined by the order in which the names stand in the Register of Members, Pursuant to the Bye-laws of the Company no resolution of Members may be passed without the affirmative vote of the Special Share cast by the holder of the Special Share. By resolution of the Board, only Members entered in the Register of Members of the Company at the close of business on May 10, 2019 (New York Time) are entitled to receive notice of and to attend and vote at the Annual General Meeting. Important Notice Regarding the Availability of Proxy Materials for the Annual General Meeting: Notice of Annual General Meeting and Annual Report are available at www.proxyvote.com. E80365-P26093 CHINA YUCHAI INTERNATIONAL LIMITED ANNUAL GENERAL MEETING OF SHAREHOLDERS JUNE 21, 2019, 9:00 A.M. I/We    of being (a) shareholder(s) of China Yuchai International Limited (the “Company”), hereby appoint(s) Name: and/orwith Passport Number: and/orof Address:and/or holding Proportion of shareholding (%):and/oror failing him/her, the Chairman of the Meeting or such other person as he may designate as my/our proxy(ies) to vote for me/us on my/our behalf at the Annual General Meeting of the Company to be held at New World Millennium Hong Kong Hotel, 72 Mody Road, Tsim Sha Tsui East, Kowloon, Hong Kong on Friday, June 21, 2019 at 9:00 A.M. (Hong Kong Time), and at any adjournment thereof. This proxy, when properly executed, will be voted in the manner directed herein. If no such direction is made, this proxy will be voted in accordance with the Board of Directors’ recommendations. Address Changes/Comments: (If you noted any Address Changes/Comments above, please mark corresponding box on the reverse side.) Continued and to be signed on reverse side