I think most guys run the 750 carbs for 604 but I do have the 650 for my 602 and it's a good one. I've had some trouble twice with trash getting stuck in between the needle and seat and flooding it, but it's a great carb.
i have a quick fuel 750 built for a 604 i would like to trade for a quick fuel 650 or willys 650 for a 602...Im changing classes and cant run nothing over a 650..
A 650 is better off of the corener and to the middle a larger carb is better on the top end longer. If you are running a track under 1/2 mile I would use the 650 1/2 and over go with the 750. Stealth I think has one that is 1/2 way in between the two for venturi size.
A 650 is better off of the corener and to the middle a larger carb is better on the top end longer. If you are running a track under 1/2 mile I would use the 650 1/2 and over go with the 750. Stealth I think has one that is 1/2 way in between the two for venturi size.
Minus the information about Stealth, this is exactly what John at JDR told me. He comes highly recommended and will be doing our stuff this year.
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