This is given as 26 mm according to the information I have.
There's no governor on a Honda Nighthawk 250. A Honda 250 Nighthawk is a motorcycle, not a lawnmower.
Which Honda Magna and which Honda Nighthawk? (Year, model including engine size).
The injectors may need cleaned. There may also be a problem with the carburetor not ejecting enough gas to the engine.
a Honda nighthawk can get up to around 500-600mph i had mine going 650 w/nos
Location of the fuse box on a 85 honda Nighthawk 650 sc
firing order 1984 650 nighthawk
43HP
67
How much engine oil does a 1982 Honda Nighthawk 650 take? 3.4 quarts
Honda Parts House and Motorcycle Superstore carry a wide range of Honda parts including those for a Nighthawk model. Alternatively a Honda dealer might be able to source missing parts.
carburetor adjustment on 1980 Honda z50r
How do you adjust carburetor 300 honda fourtrax?