[glassdoctor]

You need to understand that the motor's rating DOES NOT in ANY way mean that's what it will be actually doing. It's only a general mfg rating of what the motor can handle without a meltdown. Same thing with the battery... it's only a mfg estimate of the max loads it can do. There is no such thing as a battery or speedo with too good/too high of a rating.

You do want a good matched system so everything works well, but it's not as simple as trying to match mfg. ratings.

In actual use, the motor will average less than 50 amps... and .1 second spikes in the 100-150 amp range.

By the numbers, neither the speedo or battery can really handle what the ratings are anyway.