BD250-7/165fmm-p engine idling issue

JCblue · 07-23-2022, 06:48 PM

I have a BD250-7 cruiser, and it keeps stalling while idling. It happens when it's in both neutral and gears. I tried to give it gas and it would sometimes stall too. The engine is 165fmm-p. Has anyone has the same issue I have? Any ways I can fix it?

culcune · 07-24-2022, 02:37 AM

Have you adjusted the valve lash?

JCblue · 07-26-2022, 12:42 PM

No. How do I adjust it?
After the engine is warm, the bike's RPM would drop to around 1000. It sounds like it running lean and sometimes it just stalls.

culcune · 07-26-2022, 05:52 PM

Quote:

Originally Posted by JCblue

No. How do I adjust it?
After the engine is warm, the bike's RPM would drop to around 1000. It sounds like it running lean and sometimes it just stalls.

I think you should look at a few of the numerous videos on YouTube. Being a Chinese vertical thumper. you should be able to find a few of the videos out there of people adjusting their 2XXcc dual-sports. You have essentially the same engine, only yours is fuel-injected. There may be videos of the actual Baodiao/Boom 223cc engine, but most bikes listed under Boom will be videos of the horizontal 125cc Vader.

sco · 08-03-2022, 12:55 PM

I have a bd250-5. It had the same issue. It was also sluggish and missed below 4000 rpm. Check the spark plug. The gap was so small I had to force the 0.020 guage into the gap. I got a new plug and gapped it at 0.030 and while it still is a bit rough until warm once it is warm it idles perfect.

bosbears02 · 09-12-2022, 01:44 PM

Quote:

Originally Posted by sco

I have a bd250-5. It had the same issue. It was also sluggish and missed below 4000 rpm. Check the spark plug. The gap was so small I had to force the 0.020 guage into the gap. I got a new plug and gapped it at 0.030 and while it still is a bit rough until warm once it is warm it idles perfect.

The spark plug and the tmap on my Vitacci Titan250 165FMM-L worked for me.
I've literally only got 5 miles on it so I haven't gotten to the valve clearance yet.

Amazon links for plug and tmap...
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

07-23-2022, 06:48 PM	#1
JCblue Join Date: Jul 2022 Location: Bellevue WA Posts: 5	BD250-7/165fmm-p engine idling issue I have a BD250-7 cruiser, and it keeps stalling while idling. It happens when it's in both neutral and gears. I tried to give it gas and it would sometimes stall too. The engine is 165fmm-p. Has anyone has the same issue I have? Any ways I can fix it?
	1

07-24-2022, 02:37 AM	#2
culcune Join Date: May 2006 Location: Yuma, Arizona Posts: 9,035	Have you adjusted the valve lash? __________________ "They say that life's a carousel, spinning fast you got to ride it well..." TGB Delivery Scooter 150 TMEC 200 Enduro--carcass is sadly rotting in the backyard
	1

07-26-2022, 12:42 PM	#3
JCblue Join Date: Jul 2022 Location: Bellevue WA Posts: 5	No. How do I adjust it? After the engine is warm, the bike's RPM would drop to around 1000. It sounds like it running lean and sometimes it just stalls.
	1

08-03-2022, 12:55 PM	#5
sco Join Date: Aug 2022 Posts: 1	I have a bd250-5. It had the same issue. It was also sluggish and missed below 4000 rpm. Check the spark plug. The gap was so small I had to force the 0.020 guage into the gap. I got a new plug and gapped it at 0.030 and while it still is a bit rough until warm once it is warm it idles perfect.
	1