Big engine little ultralight

[arctic_plasma]

Hi, I'm looking to build an ultralight based on the BJ-Enduro. The primary difference is that instead of using a 16 hp, 82 lb Briggs & Stratton engine, I'd like to use a 55 hp, 135 lb engine from a geo metro. I'm guessing that the difference in hp and weight will be an issue.

I'd like to know what issues this will cause and what will I have to do to correct for these problems.

Any help would be greatly appreciated
Thanks,
-Eric

 

[Atomic_Sheep]

 

[Dana]

 

[arctic_plasma]

 

[steveair2]

 

[arctic_plasma]