Hensim 149cc 4 Stroke Not Running/Idling - Page 2

culcune · 12-27-2016, 12:27 PM

PM member 2LZ; he had two of these a few years back. Perhaps he remembers enough of the details of his bikes' engines/carbs to solve your issues? Couldn't hurt to try!

humanbeing · 12-27-2016, 05:22 PM

Quote:

Originally Posted by tyler

...want to check if cam timing and valve clearance is ok but I don't know how to do either ...

As i said b4 it's from CG family...
XLR125 http://cassiomecanico.blogspot.com/p...cb-500-98.html *in Brazilian Portuguese* had the EXACT stator/flywheel of that model
===
Pre-00s (kickstart) CG materials (tons freebie in 'net cuz was popular in UK) is what u need to read...
http://www.pdfmotomanual.com/index.p...=1846&lang=ENG | http://hondacg125.awardspace.com/valve_clearance.htm

tyler · 12-28-2016, 11:32 PM

I adjusted the valve clearances and the bike fires up I maybe just need to adjust the carb. it runs poorly atm

culcune · 12-31-2016, 07:10 PM

PM member 2LZ--he used to have a pair of Hensim 150's a few years back and never had any problems with them. He might just be able to help your situation...

2LZ · 12-31-2016, 10:40 PM

Thanks for the heads-up culcune!

If the bike your dealing with is the Hensim DB150cc CG motor, it should be cake.

Good to hear it's running after the valve adjust. Remember Intake .05mm and exhaust .08mm, ice cold, overnight. Never adjust these CG's if the motor is even remotely warm.

Things to look for. Replace ALL fuel line with known good and put in an inline good quality filter. The Chinese rubber breaks down on the inside and will toss constant crap at your jets, even if the fuel line looks good on the outside. Also, take a flashlight and look at the bottom of your fuel tank. Could be a bunch of crap you're sucking in or maybe the little sock at the petcock could be falling apart. If you see any bubbles, it's water, drain and refill.

Also, start with the stock jetting. If you can access the idle mixture, set it at 2 turns out and then back up if need be.
Pull the needle out of the slide and drop it to the fourth notch down. This will help on throttle response. I kept the stock jetting on my Hensim DB150's and just moved the needle clip and adjusted the idle mixture (after valve adjust) and they ran awesome.

How's the spark plug? If unknown, replace it. These things are so simple. the only other issue could be the CDI...but if you're getting fire, it should be ok.

Great little bike. Don't give up...........
Here's the two we had that I sold to a friend and they still run great to this day.

tyler · 01-11-2017, 01:27 PM

Quote:

Originally Posted by 2LZ

Thanks for the heads-up
Great little bike. Don't give up...........
Here's the two we had that I sold to a friend and they still run great to this day.

Thanks for the reply! I had almost given up and decided to sell both of mine... I have some time today and I'll look at the things you mentioned. I replaced the spark plug with a match from autozone. Also I believe I adjusted the valves wrong, I made the exhaust .05 and intake .03. Info found in a YouTube video for a Honda so I'm guessing that's an issue. Those Hensim 150s are beautiful btw

12-27-2016, 12:27 PM	#16
culcune Join Date: May 2006 Location: Yuma, Arizona Posts: 9,035	PM member 2LZ; he had two of these a few years back. Perhaps he remembers enough of the details of his bikes' engines/carbs to solve your issues? Couldn't hurt to try! __________________ "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
	0

12-31-2016, 07:10 PM	#19
culcune Join Date: May 2006 Location: Yuma, Arizona Posts: 9,035	PM member 2LZ--he used to have a pair of Hensim 150's a few years back and never had any problems with them. He might just be able to help your situation... __________________ "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
	0

12-31-2016, 10:40 PM	#20
2LZ Join Date: Mar 2010 Location: Volcano, Ca Posts: 7,061	Thanks for the heads-up culcune! If the bike your dealing with is the Hensim DB150cc CG motor, it should be cake. Good to hear it's running after the valve adjust. Remember Intake .05mm and exhaust .08mm, ice cold, overnight. Never adjust these CG's if the motor is even remotely warm. Things to look for. Replace ALL fuel line with known good and put in an inline good quality filter. The Chinese rubber breaks down on the inside and will toss constant crap at your jets, even if the fuel line looks good on the outside. Also, take a flashlight and look at the bottom of your fuel tank. Could be a bunch of crap you're sucking in or maybe the little sock at the petcock could be falling apart. If you see any bubbles, it's water, drain and refill. Also, start with the stock jetting. If you can access the idle mixture, set it at 2 turns out and then back up if need be. Pull the needle out of the slide and drop it to the fourth notch down. This will help on throttle response. I kept the stock jetting on my Hensim DB150's and just moved the needle clip and adjusted the idle mixture (after valve adjust) and they ran awesome. How's the spark plug? If unknown, replace it. These things are so simple. the only other issue could be the CDI...but if you're getting fire, it should be ok. Great little bike. Don't give up........... Here's the two we had that I sold to a friend and they still run great to this day. __________________ "Light a fire for a man, and you heat him for a day. Light a man on fire, and you heat him for the rest of his life." 2007 Suzuki DRZ400S (SM convert) 2009 Q Link XP 200 1967 BSA B25 250cc Starfire 2022 Royal Enfield Interceptor 650 2023 Royal Enfield Scram 411 1948 Royal Enfield Model G 350 Last edited by 2LZ; 02-06-2019 at 10:18 AM.
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12-28-2016, 11:32 PM	#18
tyler Join Date: Dec 2016 Location: California Posts: 10	I adjusted the valve clearances and the bike fires up I maybe just need to adjust the carb. it runs poorly atm
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