Help! Bike dies on me mid drive

Pyramid · 07-26-2023, 03:19 AM

Hello! So I need some help from anyone that can spare some advice. I got a new exhaust and muffler for my hawk 250 and it was working great at first, but then out of nowhere the bike dies on me mid drive last night. I tried to start the bike back up and had to do full choke on my carb to get it to fire back on but only for a short amount of time before it shut off again. Luckily it was enough to get me back home but I noticed as I drove that it sounded like very loud popping coming from the muffler when I was decelerating. Any thoughts on what it could be and how I could fix it fast?

TominMO · 07-26-2023, 10:22 AM

A freer-flowing pipe might have made the A/F ratio too lean. Motor overheats and shuts down. Cools off, starts again. Might have to re-jet the carb.

Also check valve clearances, especially the exhaust which gets hotter. Extra heat would make the valves tighter, so they never fully close and you get shutdown.

Pyramid · 07-26-2023, 10:55 AM

Quote:

Originally Posted by TominMO

A freer-flowing pipe might have made the A/F ratio too lean. Motor overheats and shuts down. Cools off, starts again. Might have to re-jet the carb.

Also check valve clearances, especially the exhaust which gets hotter. Extra heat would make the valves tighter, so they never fully close and you get shutdown.

I’m still new so I’m still getting used to learning how to do all this. How would I re-jet the carb myself, and check the valve clearance? Are there any videos you would recommend for it?

**JerryHawk250** · 07-26-2023, 11:07 AM

All that information is in the sticky at the top of the dual sport section.
https://www.chinariders.net/showthread.php?t=20331

07-26-2023, 03:19 AM	#1
Pyramid Join Date: May 2023 Posts: 7	Help! Bike dies on me mid drive Hello! So I need some help from anyone that can spare some advice. I got a new exhaust and muffler for my hawk 250 and it was working great at first, but then out of nowhere the bike dies on me mid drive last night. I tried to start the bike back up and had to do full choke on my carb to get it to fire back on but only for a short amount of time before it shut off again. Luckily it was enough to get me back home but I noticed as I drove that it sounded like very loud popping coming from the muffler when I was decelerating. Any thoughts on what it could be and how I could fix it fast?
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07-26-2023, 10:22 AM	#2
TominMO Join Date: Sep 2021 Location: De Soto, MO Posts: 1,978	A freer-flowing pipe might have made the A/F ratio too lean. Motor overheats and shuts down. Cools off, starts again. Might have to re-jet the carb. Also check valve clearances, especially the exhaust which gets hotter. Extra heat would make the valves tighter, so they never fully close and you get shutdown. __________________ 2021 Lifan Xpect--sold 2022 Lifan KPX 1972 Honda CT90--The Carrot 1969 Honda CT90--The Tomahto Cheesy is the WDK (workplace drama king). Now retired. Nope, back in the saddle. Nope, finally retired. Climate: The Movie https://www.youtube.com/watch?v=A24fWmNA6lM How our government really works https://www.youtube.com/watch?v=QjadCd0VRBw Question all authority.....think for yourself
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07-26-2023, 11:07 AM	#4
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,725	All that information is in the sticky at the top of the dual sport section. https://www.chinariders.net/showthread.php?t=20331 __________________ 2024 Linhai 300 ATV 4x4 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
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