Regarding single 44's, as opposed to those that came paired (or tripled) up as part of an OEM ski, are they all the same? I did see in the Hot Products catalog two 44's (called 44MM) with different part numbers: 53-2060S, Mikuni #BN44-40-8067, and 53-2060 Mikuni #BN44-40-8052. Maybe the 'S' just denotes it's silver in color, as the picture shows? Thank you
SBN 44's: All the same?
- Thread starter vetski179
- Start date
The 8067 and 8052 are aftermarket carbs with extended throttle shafts. I think they're the same except for color and jetting but Im not 100% sure. The 44s that came on 650 superjets have 4 pilot holes and 701s have only 3. They both work fine but would require a slightly different pilot jet or pop-off to get the same part throttle mixture setting. OEM Yamaha 760 and 1200 racks have 3 hole pilots and the longer 1.60 throttle plates. They also work fine but will tune slightly different than the aftermarket 4 hole carbs with 1.20 plates.
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john zigler
Vendor Account
- Location
- wisconsin
OEM carbs are different than universal off the shelf carbs. OEM carbs are made by mikuni to the manufacturers specs for that specific engine, to meet EPA standards, etc. Internal circuity is different, throttle plate angles are different, etc. They will work on other applications but are not always the best option, and can be harder to dial in.
The only difference in the Hot Products carbs 8052 & 8067 is the color and jetting. Either will need to be jetted for your application. Not once in my 37+ years of building watercraft have I found an application where these run as is out of the box.
The only difference in the Hot Products carbs 8052 & 8067 is the color and jetting. Either will need to be jetted for your application. Not once in my 37+ years of building watercraft have I found an application where these run as is out of the box.
waxhead
wannabe backflipper
- Location
- gold coast
You're spot on—the four holes are actually called progression ports, and they help the carb transition smoothly from idle to the high-speed jet. The early models had four instead of three, mainly due to emissions regs, but the four-hole versions actually give better throttle response.
It’s not like people haven’t been doing this for years in Lite SuperJets, running WaveRaider carbs with the extra progression ports.
Personally, when it comes to 44s, I love the stock 760 setup—it’s cheap, dials in beautifully, and just works. Yeah, they’re emission-style carbs, but with reverse jetting, they hit harder than a divorce lawyer with a grudge!
Most excellent replies! I've been involved with riding and racing since the mid-80's and never knew any of this. My reason for asking is I'm putting together a trio of 44's for a SXR800 to 1100 swap. I have 2 core 44's (still need the 3rd one) I am going to go through. How can I ID what I have to make sure they're good-to-use?