@@EricksonMachinePerformance the ski came stock with a 38mm carb and I tried putting the 44 but it’s bigger, I’m wondering with a completely stock application if it’s better to just run the smaller size? I wish you were on the west coast! I appreciate all your info and videos are awesome
Hey how are you. I have a problem I bought a sbn44 carb off Amazon BN44-40-8052 And the base of the carb is much larger then my 550 base of intake manifold. Any suggestions of what I need? Intake manifold us to hold a bn38
Subscribed, my brother just bought the adapter and new sbn44 for his stock js550. Would the jetting you show in the video be correct for us here in Washington state at about 800ft above sea level? Thank you!
Hey, loving your videos on 2 stroke mods! I've got a 1236 lathe and rotary table on an rf30 mill, I heard you mention flywheel lightening as a great mod to do. Any chance you could do one on a js440? Thanks!
I have a 86 Js440 Bn38 I rebuilt the Carb and still can't get it to suck fuel .. any suggestions on what I should test. If there is a better carb to slap on there or a guide to making sure everything is spec'ed properly?
I"m in the process of doing this exact upgrade. Do you have a pic or video of connecting the fuel lines back up to the new carb? I noticed the new carb has 4 inlets instead of 5 like the old one. The extra from the old carb looks like the one that was opposite of the primer inlet. What do you do with the old tube that connected there on the old carb? Thanks!
I have always had problems with the base carb gasket leaking so i yamabond the gasket both sides but thats just me im just backyard builder not a proffesional engine builder
I would like to put an SBN 38 on my 440 that has a pipe, velocity stack, some port work. Do you have a suggestion on where I should start with the jetting, needle seat and pop off?
Everything I've read about 2-strokes is that they get most of their power by upgrading the pipe and carb together. I understand the tunability of SBN carbs over the BN, but without a pipe you're still going to be pretty restricted for power, no?
The popoff wont change because of the flame arrestor BUT with a restricted flame arrestor or free flowing 1 you could need to change popoff by changing needle and seat or spring or both.
Nice simple video. Does the SBN come with a primer hookup or is there a choke system to remove first? Are all the fuel lines the same direction or do you have to run new lines when you do the swap? Is the throttle throw the same or do you have to adjust your throttle cable as well?
Here's a question for you. I have a customer that brought me all these parts to do the swap. The jets, needle and seat, and spring are spot on to what you have. My issue is after installing carb, the engine was flooding and not starting to the point that it was coming out of the pulse line. Did a pop off check and was popping right under 15psi. Have you seen this before?
@@EricksonMachinePerformance ok Bro, thanks for the response, i figured it out and the sbn 44 will not work on the 440, it loads up with fuel, and ends up running like a dead chicken, the sbn 38 is what comes on it from the factory, so im gonna pick up one of them..
Yeah i have found properly cleaning hardware and components before assembly, chasings all holes and having true gasket surfaces then torquing everything correctly is all that is needed. I put s dab of grease on the heads of the fasteners to help when torquing but that is it on these engines.
Hi sir , does I still Need the rev Limiter Form my oem bn44 Carb if I rum a sbn 44?
Watching you handle that engine is like watching one of those Indian videos where they turn a dumpster into a dump truck... 😬
Thank you
I purchased the carb but the bolt pattern is not the same. Can someone get me a part # for the correct carb?
Did yours have a 38 or 44?
@@EricksonMachinePerformance the ski came stock with a 38mm carb and I tried putting the 44 but it’s bigger, I’m wondering with a completely stock application if it’s better to just run the smaller size? I wish you were on the west coast! I appreciate all your info and videos are awesome
@@EricksonMachinePerformance I should clarify I have a 1978 Js440 I’m building for my kids lol
Hey how are you. I have a problem I bought a sbn44 carb off Amazon BN44-40-8052
And the base of the carb is much larger then my 550 base of intake manifold. Any suggestions of what I need?
Intake manifold us to hold a bn38
Subscribed, my brother just bought the adapter and new sbn44 for his stock js550. Would the jetting you show in the video be correct for us here in Washington state at about 800ft above sea level?
Thank you!
Hey, loving your videos on 2 stroke mods! I've got a 1236 lathe and rotary table on an rf30 mill, I heard you mention flywheel lightening as a great mod to do. Any chance you could do one on a js440? Thanks!
What’s the best upgrade carb for a 87 650sx
Headphone users beware of torque wrench.
I want to see the sleaving process, can't wait that will be a good one. 👍
This week the video will be out
@@EricksonMachinePerformance AWESOME!!!!
Great video. Thank you!
I have a 86 Js440 Bn38 I rebuilt the Carb and still can't get it to suck fuel .. any suggestions on what I should test. If there is a better carb to slap on there or a guide to making sure everything is spec'ed properly?
Check compression, and check the pulse line.
I"m in the process of doing this exact upgrade. Do you have a pic or video of connecting the fuel lines back up to the new carb? I noticed the new carb has 4 inlets instead of 5 like the old one. The extra from the old carb looks like the one that was opposite of the primer inlet. What do you do with the old tube that connected there on the old carb? Thanks!
If you want email me I'll be happy to help
Ericksonmap@gmail.com
Right tight, left loosen. We get it. Edit
I have always had problems with the base carb gasket leaking so i yamabond the gasket both sides but thats just me im just backyard builder not a proffesional engine builder
Maybe the carb or the intake is warped. That isn't a common issue
Hello
I like your videos, I'm interested in a Kawasaki 650 or 750 carb. I'm from Mexico, greetings
email me ericksonmap@gmail.com
I would like to put an SBN 38 on my 440 that has a pipe, velocity stack, some port work. Do you have a suggestion on where I should start with the jetting, needle seat and pop off?
65 low, 110 high, 23 psi
Everything I've read about 2-strokes is that they get most of their power by upgrading the pipe and carb together. I understand the tunability of SBN carbs over the BN, but without a pipe you're still going to be pretty restricted for power, no?
That is mostly true But the 550 pipe work better then stock pipes. Together they are and even better combo.
can you buy an sbn44 from someone that’s been tuned / adjusted and jetted with the right spring for a js550 pre done?
Email me ericksonmap@gmail.com
Port a 440 please
Can you show what fuel lines run what way on sbn carb? Fuel in, return, vaccume
Bottom is in (feed)
top return
Pulse is middle
also, popoff spring and pressure is possibly going to change when going from a stock flame arrestor to a more free-flowing aftermarket one.
The popoff wont change because of the flame arrestor BUT with a restricted flame arrestor or free flowing 1 you could need to change popoff by changing needle and seat or spring or both.
Nice simple video. Does the SBN come with a primer hookup or is there a choke system to remove first? Are all the fuel lines the same direction or do you have to run new lines when you do the swap? Is the throttle throw the same or do you have to adjust your throttle cable as well?
This 1 come with primer fittings. The lines are the same but in slightly different locations. And the throw is the same
Here's a question for you. I have a customer that brought me all these parts to do the swap. The jets, needle and seat, and spring are spot on to what you have. My issue is after installing carb, the engine was flooding and not starting to the point that it was coming out of the pulse line. Did a pop off check and was popping right under 15psi. Have you seen this before?
Problem with the fuel pump. Go thru the carb. And 15psi is a low popoff for a 550
@@EricksonMachinePerformance appreciate the response.
Wheres the best place to get the carb? I've got a suzuki 550
Email me I can't get them for u
Do you have a video on rebuilding a yamaha midshaft?
I dont but im sure I will do one in the future
Love your videos... Thanks
Glad you like them!
will my Kawasaki JS440 run and drive fine, with a sbn44 upgrade? or is this build just for the 550 engines?
I have to be honest we RARELY do anything with 440s other then bore a cylinder once in a blue moon. I can't comment because I haven't done it
@@EricksonMachinePerformance ok Bro, thanks for the response, i figured it out and the sbn 44 will not work on the 440, it loads up with fuel, and ends up running like a dead chicken, the sbn 38 is what comes on it from the factory, so im gonna pick up one of them..
@@jamesbutler4185 email me your # let me know what jetting you have. It should work. Ericksonmap@gmail.com
I found it beneficial to silicone 10mm fastener threads, otherwise they vibrate loose.
Yeah i have found properly cleaning hardware and components before assembly, chasings all holes and having true gasket surfaces then torquing everything correctly is all that is needed. I put s dab of grease on the heads of the fasteners to help when torquing but that is it on these engines.
@@EricksonMachinePerformance I think some manual also recommend silicone on stator bolt threads. I just put it on all of them.
Hi Mark, great video what pop off with an 80g spring?
2 0 n/s with 80gr spring = 21psi pop
@Erickson Machine & Performance Thanks, Mark. I will give that a go.
what torque wrench is that?
It's a snap-on digital torque angle wrench
shop.snapon.com/product/TechAngle-Models-(2%-Accuracy)/3-8%22-Drive-TechAngle-Flex-Head-Torque-Wrench-(5%E2%80%93125-ft-lb)/ATECH2F125VH