Carb swap and motor ID question
Posted: Sun Apr 19, 2020 3:19 pm
Hi everybody, I had to swap an 84-85 nq50 carb onto my spree. My spree is an 85 but the motor has the kick start so I know it's been swapped. Do I use the carb adjust specs for the 84-85? Or 86?
Also I've been having trouble identifying whether or not this motor is an nq50 or an sb50, people say something about the sb50 case having a hump while the nq50 is flat. After looking up pictures of both I can't see a noticeable difference between them. My motor originally had an sb50 carb on it, but it has been hacked so that's why I got another carb for it from a dead 85 nq50. It also has the sb50 intake and reeds. I don't have the dead nq50 or I'd compare it to mine.
And also the front drive pulley is different than the ones I see pictures of in the nq50, I didn't get a pic while it was apart.. But it doesn't have the flat outer edge that I see on newer nq50s and it is also bigger than and doesn't have fins on the back like the older nq50s. Instead it is rounded on the outer edge and other than the ramp obviously, it is flat on both sides. I haven't been able to find a pic of one similar to mine either so unfortunately the only way I can show it is to take the cover back off, which I guess I'll do if I need to. I tried to look up some sb50 info to maybe get an idea but all I ever find are people saying they're different, can't find any good pictures of the sb50 with the case off. If it is an sb50 then I'll order an sb50 carb. Or look into trying to fix the one I have. Cause right now I'm running premix 32:1 using the honda gn2 oil. I installed tazlands 48mm bbk, and have also installed the larger jet he included into the nq50 carb. It runs pretty good, but I don't like running it without the injector because it's still needs to break in. And neither the spree carb or sb50 intake have an injector hookup so just to run it I have the injector pumping into a bottle.
Sorry for the long read, and I am thankful for any replies I get. And forgive me for my ignorance, I don't work on scooters often, much less a 2 stroke.
Also I've been having trouble identifying whether or not this motor is an nq50 or an sb50, people say something about the sb50 case having a hump while the nq50 is flat. After looking up pictures of both I can't see a noticeable difference between them. My motor originally had an sb50 carb on it, but it has been hacked so that's why I got another carb for it from a dead 85 nq50. It also has the sb50 intake and reeds. I don't have the dead nq50 or I'd compare it to mine.
And also the front drive pulley is different than the ones I see pictures of in the nq50, I didn't get a pic while it was apart.. But it doesn't have the flat outer edge that I see on newer nq50s and it is also bigger than and doesn't have fins on the back like the older nq50s. Instead it is rounded on the outer edge and other than the ramp obviously, it is flat on both sides. I haven't been able to find a pic of one similar to mine either so unfortunately the only way I can show it is to take the cover back off, which I guess I'll do if I need to. I tried to look up some sb50 info to maybe get an idea but all I ever find are people saying they're different, can't find any good pictures of the sb50 with the case off. If it is an sb50 then I'll order an sb50 carb. Or look into trying to fix the one I have. Cause right now I'm running premix 32:1 using the honda gn2 oil. I installed tazlands 48mm bbk, and have also installed the larger jet he included into the nq50 carb. It runs pretty good, but I don't like running it without the injector because it's still needs to break in. And neither the spree carb or sb50 intake have an injector hookup so just to run it I have the injector pumping into a bottle.
Sorry for the long read, and I am thankful for any replies I get. And forgive me for my ignorance, I don't work on scooters often, much less a 2 stroke.