Crazy Joe's BAM V2 build

JetManiac

Thinking about shredding
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Jun 8, 2008
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orlando
#62
Glad you made it to the water. Make sure to loctite the carb linkage screws. And swap the fuel line for OEM when you can.
 
Joined
May 16, 2017
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Detroit metro
#63
Glad you made it to the water. Make sure to loctite the carb linkage screws. And swap the fuel line for OEM when you can.
Good tips. I will switch the fuel line over during the long winter.

A little update, after dealing with a bad stator at about 30 minutes ride time, I finally got the ski mostly dialed in. Initially, I had a terrible lean hesitation from idle to 1/4 where the ski would actually die if I went wot from idle. I went out to about two and a half turns out on the low screw (120 pilot) and got that mostly dialed out. I upped my idle so that the ski will not stall off throttle and that helped too. I cannot seem to source pilot jets bigger than 120 for the SBN carbs. Anyone know if they make them?

I am still getting fuel dribbling down the carb from the venturi after a quick wot cut running on my stand. Pop off tested at 32 to 34 psi each carb with 2.0 n/s and gold springs. I ordered a set of 1.8 n/s and black springs to give that a go. I am also going to double up on the check valve discs as I was reading in the Mikuni tuning manual that can help with excess pressure or leaking of some sort. I don't quite understand what those check valves do.

Now that I have 2 hours on the engine, I backed my oil ratio down to 40:1 using skicraft.

I am trying to get this engine dialed in so I can grab a handful of throttle right from idle and have it pull hard. I am not quite there but getting close. Its very ride-able now. Looking forward to taking it out after work today to get more tray time.
 
Joined
May 16, 2017
Likes
100
Location
Detroit metro
#64
Finally got the engine to pull hard from idle to WOT. I backed my N/S down to a 1.8 with a black spring which netted me about 26 psi pop off. I still need to tune the needles and lean it out some but it pulls nice with no hesitation now! I doubled up on the check valves in the carbs but still have fuel dribbling out the venturi after a WOT cut. It runs good so I guess it is not a concern. Just kind of wondering what actually causes this.

Also, I am officially titled and registered in Michigan!

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