![]() |
#1 |
Join Date: Apr 2021
Location: Harrisburg Pennsylvania
Posts: 13
|
New Brozz250 smoking
Is it Normal for smoke to be coming off of the exhaust near the motor on a new bike? It also is cutting off on its own after a few minutes of running
|
![]() |
![]() |
#2 |
Join Date: May 2020
Location: California
Posts: 169
|
It's normal to get some burn off when you first start a new china bike.
I would pop the gas cap and see if it's a venting issue.
__________________
2020 Boom Vader Gen 2 2019 CSC TT250 2021 Kayo Fox 70 |
![]() |
![]() |
#4 |
Join Date: Apr 2017
Location: Omaha, NE
Posts: 8,100
|
Yeah, it's normal for a bit of a smoke show on brand new bikes. They are coated in a protective oil film for transport.
__________________
Hawk Information and Resource guide: http://www.chinariders.net/showthread.php?t=20331 2018 Hawk 250 - Full Mod list here. http://www.chinariders.net/showpost....62&postcount=1 2024 Royal Enfield Shotgun 650 https://chinariders.net/showthread.php?t=34124 |
![]() |
![]() |
#5 |
Join Date: Oct 2020
Location: Flower Mound Texas
Posts: 904
|
It's normal for the oil and paint to burn off when they're new, but it's not normal for them to shut off on their own. Check for loose intake bolts or a vacuum leak. That will cause the exhaust to get hotter than normal and make it overheat and quit. It's probably ok, but wont hurt to check.
__________________
2021 Tao Tbr7 - "Lucille" Mods so far- Brozz swingarm, 21" front rim (Bridgestone Tw302 rear/Dunlop D606 front tires), Digital gauge cluster, pz30b pumper carb, after market hand guards, aftermarket brake and clutch levers, round fold away mirrors, Fly handlebars shortened slightly, 13t front sprocket 2009 Q-link Legacy 250 1982 Suzuki GS1100ES - "Jolene" |
![]() |
![]() |
#6 |
Join Date: Feb 2021
Posts: 988
|
Did you adjust your idle screw to about 1,400 RPMs ? Does it just go from a nice smooth idle to suddenly dying like someone turned the key off, or is it more like it gradually looses RPMs, and dies ?
|
![]() |
![]() |
#7 |
Join Date: Apr 2021
Location: Harrisburg Pennsylvania
Posts: 13
|
I did adjust the idle screw after it seemed warmed up and had it around the 1500 mark. Definitely shuts off like someone turned the key. I’m going to check the bolts on both sides of the carburetor to make sure they are not loose tomorrow based on the potential vacuum leak mentioned.
|
![]() |
![]() |
#8 |
Join Date: Feb 2021
Posts: 988
|
I would bet it has more to do with spark than air,or fuel , if it just dies suddenly from a smooth fast idle. I don't know what the temperature is like were you live,but these motors get hot especially stationary, and idleing . Electronics have a way of acting up when exceptionally hot.
|
![]() |
![]() |
#9 |
Moderator
Join Date: Oct 2016
Location: Houma, La.
Posts: 11,653
|
You also need to gain access to the idle mixture screw and tune it. You will have to remove the plug that is covering it up. I'm sure it's like most of these bikes, the idle mixture is probably set way to lean. But before you go nuts trying to tune it, adjust your valves. More than likely set with little to no gap.
__________________
2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S (Sold) 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel |
![]() |
![]() |
#10 | |
Join Date: Jun 2016
Location: Colorado
Posts: 1,107
|
Quote:
__________________
Bashan Blaze Mods: Alloy Rim's, Muffler, Mukuni VM26 Carb, Foam Filter, Tachometer, Volt Meter,LED Headlight, LED Blinkers |
|
![]() |
![]() |
#11 |
Join Date: Apr 2021
Location: Harrisburg Pennsylvania
Posts: 13
|
I did actually adjust the valve lashing before ever starting the bike. I followed a "Joamon" doc i found somewhere that listed .003 for break-in. Its possible maybe I didn't do it right since its my first time doing it but basically followed the steps I saw online in a few videos.
|
![]() |
![]() |
#12 |
Join Date: Apr 2021
Location: Harrisburg Pennsylvania
Posts: 13
|
As an update I pulled the spark plug (i had replaced with an NGK ) and found that the gap was high so I reset the gap to match what the Brozz manual had and it seemed somewhat better and stayed running without cutting off.
My next thought is the fuel/mixture screw on the carb - anyone have any pictures or know of a video that shows how to modify it - mine is either capped or broken so no screw driver will fit. |
![]() |
|
![]() |
![]() |
Tags |
brozz 250 |
|
|