Carb/Throttle

barnold · 06-12-2017, 09:52 AM

My son complained about the thumb throttle being hard to use, so i switched to a twist. After a full weekend of riding, he was still complaining about the amount of force needed to twist the throttle, he rode many other thumb and twist machines during the weekend and did not complain about the force on them. is there anything I can do to make it easier, maybe a new/ different style carb. Falcon 150 GY6 style motor

rvl8rida · 06-12-2017, 10:00 AM

I feel like you could shorten the spring on top of the slide as long as the slide closes consistently. I would order a replacement spring for your carb just in case before you do the work.

barnold · 06-12-2017, 10:27 AM

https://ae01.alicdn.com/kf/HTB1N1v1L...ER-GO-KART.jpg

this is what my carb looks like, I do not think i have a top spring

Snoking · 06-12-2017, 10:37 AM

Maybe the return spring visible on the left is wound to tight?

**JerryHawk250** · 06-12-2017, 11:08 AM

Quote:

Originally Posted by Snoking

Maybe the return spring visible on the left is wound to tight?

That's what i'm thinking too. may have been assembled wit an extra wrap on the spring. Have you tried operating it manually at the carb to see if it had any resistance as in being tight and not just spring tension?

barnold · 06-12-2017, 11:57 AM

it is still really tight when I operate it at the carb

**JerryHawk250** · 06-12-2017, 12:17 PM

Quote:

Originally Posted by barnold

it is still really tight when I operate it at the carb

I would try removing the butterfly shaft and clean it up , lubricate and reinstalling. That will give to a chance to see how many wraps you have on the spring at the same time.

Weldangrind · 06-12-2017, 01:41 PM

I recommend going back to a thumb throttle and adding an extender. My wife and I each have one.

FLASHLIGHTBOY · 06-13-2017, 01:43 AM

you can cut the spring down... just ( 1) spring wrap in the carb body... and try that... might be too strong.. make sure the thumb lever moves ok.. undo the throttle cable and try it by itself..

barnold · 06-13-2017, 11:57 AM

thanks for all the replies. I took the carb off and cleaned and lubed the butterfly it seems to move free, it had 1 wrap on the spring, cabl and twist moves good and free. I might modify the spring or might just give my kid roids(just kidding) he will get stronger as he go along. Is there a different style of carb that could be used, I see in the web there are some that has the throttle cable in the top of the carb.

FLASHLIGHTBOY · 06-13-2017, 02:46 PM

when you say WRAPS .. what do you mean?? plastic tie wraps... or coils on the spring... a lot of problems are when you use plastic ties to hold the cable.. this stop the action of the throttle tension... make sure the cable itself work freely... and the thumb lever does not bind.. never really heard of this problem without it being sticky due to binding.. dry .. needing lube.. the barrel in the carb sticking by itself.. check it out.. the barrel and needle should be loose in the carb.. cable free to move.. only the spring on the barrel stops and returns the barrel..

**JerryHawk250** · 06-13-2017, 03:34 PM

Quote:

Originally Posted by FLASHLIGHTBOY

when you say WRAPS .. what do you mean?? plastic tie wraps... or coils on the spring... a lot of problems are when you use plastic ties to hold the cable.. this stop the action of the throttle tension... make sure the cable itself work freely... and the thumb lever does not bind.. never really heard of this problem without it being sticky due to binding.. dry .. needing lube.. the barrel in the carb sticking by itself.. check it out.. the barrel and needle should be loose in the carb.. cable free to move.. only the spring on the barrel stops and returns the barrel..

When you say barrel, are your referring to the slide? If so the slide and needle are vacuum operated in that carb. The cable only operates the butterfly valve.

barnold · 06-25-2017, 10:31 AM

Just a Update I went back to the thumb and added a extender, that was the ticket

FLASHLIGHTBOY · 06-26-2017, 12:58 AM

ok that works good fix

06-12-2017, 09:52 AM	#1
barnold Join Date: Nov 2016 Location: Chesterfield, MI Posts: 15	Carb/Throttle My son complained about the thumb throttle being hard to use, so i switched to a twist. After a full weekend of riding, he was still complaining about the amount of force needed to twist the throttle, he rode many other thumb and twist machines during the weekend and did not complain about the force on them. is there anything I can do to make it easier, maybe a new/ different style carb. Falcon 150 GY6 style motor
	0

06-12-2017, 10:37 AM	#4
Snoking Join Date: May 2017 Posts: 4	Maybe the return spring visible on the left is wound to tight? __________________ TAOTAO 125F1
	1

06-12-2017, 01:41 PM	#8
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	I recommend going back to a thumb throttle and adding an extender. My wife and I each have one. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	0

06-13-2017, 01:43 AM	#9
FLASHLIGHTBOY Join Date: May 2009 Location: SASKATOON Posts: 1,161	coil you can cut the spring down... just ( 1) spring wrap in the carb body... and try that... might be too strong.. make sure the thumb lever moves ok.. undo the throttle cable and try it by itself.. __________________ DEALER FOR ZSTAR & GIO PRODUCTS, TAOTAO ABIBABA ATV ETC
	0

06-13-2017, 02:46 PM	#11
FLASHLIGHTBOY Join Date: May 2009 Location: SASKATOON Posts: 1,161	wraps when you say WRAPS .. what do you mean?? plastic tie wraps... or coils on the spring... a lot of problems are when you use plastic ties to hold the cable.. this stop the action of the throttle tension... make sure the cable itself work freely... and the thumb lever does not bind.. never really heard of this problem without it being sticky due to binding.. dry .. needing lube.. the barrel in the carb sticking by itself.. check it out.. the barrel and needle should be loose in the carb.. cable free to move.. only the spring on the barrel stops and returns the barrel.. __________________ DEALER FOR ZSTAR & GIO PRODUCTS, TAOTAO ABIBABA ATV ETC
	0

06-12-2017, 10:00 AM	#2
rvl8rida Join Date: Apr 2017 Posts: 27	I feel like you could shorten the spring on top of the slide as long as the slide closes consistently. I would order a replacement spring for your carb just in case before you do the work.
	0

06-12-2017, 10:27 AM	#3
barnold Join Date: Nov 2016 Location: Chesterfield, MI Posts: 15	https://ae01.alicdn.com/kf/HTB1N1v1L...ER-GO-KART.jpg this is what my carb looks like, I do not think i have a top spring
	0

06-12-2017, 11:57 AM	#6
barnold Join Date: Nov 2016 Location: Chesterfield, MI Posts: 15	it is still really tight when I operate it at the carb
	0

06-13-2017, 11:57 AM	#10
barnold Join Date: Nov 2016 Location: Chesterfield, MI Posts: 15	thanks for all the replies. I took the carb off and cleaned and lubed the butterfly it seems to move free, it had 1 wrap on the spring, cabl and twist moves good and free. I might modify the spring or might just give my kid roids(just kidding) he will get stronger as he go along. Is there a different style of carb that could be used, I see in the web there are some that has the throttle cable in the top of the carb.
	0

06-25-2017, 10:31 AM	#13
barnold Join Date: Nov 2016 Location: Chesterfield, MI Posts: 15	Just a Update I went back to the thumb and added a extender, that was the ticket
	1

06-26-2017, 12:58 AM	#14
FLASHLIGHTBOY Join Date: May 2009 Location: SASKATOON Posts: 1,161	thumb extender ok that works good fix __________________ DEALER FOR ZSTAR & GIO PRODUCTS, TAOTAO ABIBABA ATV ETC
	0