Specification model:

[Two-stroke upgrade] +1 domestic chain + Gift

[Two-stroke upgrade] +2 domestic chains + gifts

[Two-stroke upgrade] +3 domestic chains + gifts

[Two-stroke upgrade] +1 imported chain + Gift

[Two-stroke upgrade] +2 imported chains + gifts

[Two-stroke upgrade] +3 imported chains + gifts

[Four-stroke high power] +1 domestic chain + Gift

[Four-stroke high power] +2 domestic chains + gifts

[Four-stroke high power] +3 domestic chains + gifts

[Four-stroke high power] +1 imported chain + Gift

[Four-stroke high power] +2 imported chains + gifts

[Four-stroke high power] +3 imported chains + gifts

[Four-stroke high power] +4 imported chains + gifts

[Two-stroke burning mixed oil] [four-stroke burning pure gasoline]]