Summit Jetting

Question

Dear Motorheadd,

I own a Summit 550 (fan cooled). Is it dangerous to adjust the needle in the carbs to make the gasoline consumption leaner? Could it result in an explosion?

Tevie

Reply:

Thanks for your email!

Adjusting any parameter of your sleds carburetion has risks if you don’t know what you’re doing.

I would suggest reading info from Mikuni on jetting or getting advice from a dealer or local tuner before doing any jetting adjustments.

Ambient temp, altitude and current settings must be used in any equation when making jetting changes.

A very real risk of seizure is apparent if you don’t know what you’re doing. Conversely, your sled will run worse if you go the wrong way and end up too rich.

Motorhead Mark

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