sudden loss of throttle response from idle

Ina Ditch · 06-08-2020, 01:07 PM

this problem popped up overnight a few days ago. I rode the recon Wednesday night less than a mile and everything was good, I took off work Thursday to ride and found that sudden throttle from idle would cause the engine to bog down to the point it would die. It runs fine at riding rpm's and isn't a problem but sitting in neutral any sudden throttle has the bogging effect.
what is my most likely problem?

Thanks guy's.

mtiberio · 06-08-2020, 01:35 PM

turn off the choke

Megadan · 06-08-2020, 01:47 PM

He is right, it could very well be that the choke got turned on by accident or with a sharp bump.

Otherwise, since you are still breaking in the bike the valves may need re-adjusting. My valves got tight on my hawk after just 200 miles and I had to set the lash again.

As the rings seat and compression increases the state of tune of the carb may also need to be tweaked a bit.

Ina Ditch · 06-08-2020, 02:17 PM

Hey Fellas, I did try to kick start it that morning with it choked but was sure I put it back to normal but I bet I didn't. Heading out now to do some tightening and adjusting and bleed the rear brake, I will check the choke before I get to far.
Thank you both very much for the input.

Ina Ditch · 06-08-2020, 04:25 PM

well it wasn't the choke and since it only occurs at low rpm would I be on track to start looking at air? I was hesitant to start tearing it apart because we are still getting spotty rain and my shop looks like the four trax exploded, parts and pieces everywhere. I did find my rear brake issue was mostly a pinched hose, possibly from the crash. the front fender rattle turned out to be one of the fasteners in the bracket is sheared, again possibly from the crash. I readjusted the chain as well.

Megadan · 06-09-2020, 01:40 AM

doesn't take long to check the valves. valves control air lol.

Ina Ditch · 06-09-2020, 01:09 PM

Quote:

Originally Posted by Megadan

doesn't take long to check the valves. valves control air lol.

agreed, actually need to do that again and intended to days and days ago and thought I was out of the rain yesterday but I was wrong, I guess I will have to clean the shop instead of riding my next day off. gotta do what we gotta do I guess

Megadan · 06-09-2020, 02:21 PM

Quote:

Originally Posted by Ina Ditch

agreed, actually need to do that again and intended to days and days ago and thought I was out of the rain yesterday but I was wrong, I guess I will have to clean the shop instead of riding my next day off. gotta do what we gotta do I guess

Believe me, my work space is a constant juggling act between bikes, tools, lawn equipment, etc. It is a never ending cycle of moving and re-organizing just so I can have a good work space.

Ina Ditch · 06-09-2020, 04:22 PM

Quote:

Originally Posted by Megadan

Believe me, my work space is a constant juggling act between bikes, tools, lawn equipment, etc. It is a never ending cycle of moving and re-organizing just so I can have a good work space.

same here, plus to many tools that don't see the use they once did but I hang on to everything so my grandsons and hopefully my granddaughter can get use out of them when I go toes up. the plan a few months ago was to build a new tool crib but now all I want to do is ride !! I am weak and need help

Ina Ditch · 06-12-2020, 06:10 PM

Hello all, I adjusted the valves and changed the oil this morning and just bumping the starter she started right up but the hesitation is still there. I came in and changed clothes to take her out for a run and while I was getting ready Jeff from Peace called to verify some parts he was getting ready to send out so I told him about the problem and what I had done and he suggested that I re-jet the carb. I did a search and found some info but I am wondering if anyone with the newer model brozz bikes has tried this kit-
https://www.amazon.com/Terberl-Carbu...2883060671tton

thanks

06-08-2020, 01:07 PM	#1
Ina Ditch Join Date: Mar 2020 Location: NW-Fl Posts: 305	sudden loss of throttle response from idle this problem popped up overnight a few days ago. I rode the recon Wednesday night less than a mile and everything was good, I took off work Thursday to ride and found that sudden throttle from idle would cause the engine to bog down to the point it would die. It runs fine at riding rpm's and isn't a problem but sitting in neutral any sudden throttle has the bogging effect. what is my most likely problem? Thanks guy's.
	0

06-08-2020, 01:35 PM	#2
mtiberio Join Date: Jun 2016 Location: Arlington, VA Posts: 258	turn off the choke __________________ 4 time WERA SuperVintage Roadracing National Champion, SCTA Land Speed Record Holder, 3rd AMA Motorcycle GP of Miami
	1

06-08-2020, 01:47 PM	#3
Megadan Join Date: Apr 2017 Location: Omaha, NE Posts: 8,029	He is right, it could very well be that the choke got turned on by accident or with a sharp bump. Otherwise, since you are still breaking in the bike the valves may need re-adjusting. My valves got tight on my hawk after just 200 miles and I had to set the lash again. As the rings seat and compression increases the state of tune of the carb may also need to be tweaked a bit. __________________ 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
	1

06-09-2020, 01:40 AM	#6
Megadan Join Date: Apr 2017 Location: Omaha, NE Posts: 8,029	doesn't take long to check the valves. valves control air lol. __________________ 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
	0

06-08-2020, 02:17 PM	#4
Ina Ditch Join Date: Mar 2020 Location: NW-Fl Posts: 305	Hey Fellas, I did try to kick start it that morning with it choked but was sure I put it back to normal but I bet I didn't. Heading out now to do some tightening and adjusting and bleed the rear brake, I will check the choke before I get to far. Thank you both very much for the input.
	0

06-08-2020, 04:25 PM	#5
Ina Ditch Join Date: Mar 2020 Location: NW-Fl Posts: 305	well it wasn't the choke and since it only occurs at low rpm would I be on track to start looking at air? I was hesitant to start tearing it apart because we are still getting spotty rain and my shop looks like the four trax exploded, parts and pieces everywhere. I did find my rear brake issue was mostly a pinched hose, possibly from the crash. the front fender rattle turned out to be one of the fasteners in the bracket is sheared, again possibly from the crash. I readjusted the chain as well.
	0

06-12-2020, 06:10 PM	#10
Ina Ditch Join Date: Mar 2020 Location: NW-Fl Posts: 305	Hello all, I adjusted the valves and changed the oil this morning and just bumping the starter she started right up but the hesitation is still there. I came in and changed clothes to take her out for a run and while I was getting ready Jeff from Peace called to verify some parts he was getting ready to send out so I told him about the problem and what I had done and he suggested that I re-jet the carb. I did a search and found some info but I am wondering if anyone with the newer model brozz bikes has tried this kit- https://www.amazon.com/Terberl-Carbu...2883060671tton thanks
	0