1974 CZ Enduro Carb problem

warren · 04-20-2012, 01:50 AM

Hey,

So I bought an old dirtbike. It's a 175 one banger. I cleaned the carb out and we got it running (after a while). We were monkeying with the carb screws and they weren't really affecting all that much. Then we took out a jet on the side, which killed it. We then tightened it back in and it wouldn't stay running, so we rigged something onto it so it would sit in the 'correct' position without loosening, and monkeyed more with the screws. Then we took the jet out again, and tightened it up, and it started working correctly again. Now, it runs alright, but when I open it up full throttle, it bogs down. As long as I keep it about 80-85% it is fine, but when past that I need to clutch and start revving it to keep the engine running. It was doing this all along, and this is the best it has been, but I still would like to know what the issue is.
Thanks guys!

Tango911 · 05-11-2012, 10:30 AM

the jet on the side, is the air screw, or could be the fuel screw, if you turned it in all the way too hard, you might have messed up the end of the screw. you should pull the carb off , take it a part and clean every jet, spray into each hole with carb cleaner and then blow it out with an air gun. if you know someone with an ultrasonic cleaner, that would help too. you might want to buy a jet kit for about 20$. Just some thoughts. You can look up what your airscrew or fuel screw setting should be for stock if your exhaust is stock and airbox.

punisher · 06-09-2012, 07:34 AM

replace the carb end of problem.update.

Tango911 · 06-09-2012, 08:43 AM

yea some people do it that way, just buy new everything till you fix the prob and have more money in the bike then its worth :P

punisher · 06-09-2012, 10:22 PM

CZ carbs most which are Jickov are very unruly and hard to maintain.i have a vintage CZ 400 motorcross bike.And a new carb made it rock.

04-20-2012, 01:50 AM	#1
warren Newbie Join Date: Apr 2012 Posts: 4	1974 CZ Enduro Carb problem Hey, So I bought an old dirtbike. It's a 175 one banger. I cleaned the carb out and we got it running (after a while). We were monkeying with the carb screws and they weren't really affecting all that much. Then we took out a jet on the side, which killed it. We then tightened it back in and it wouldn't stay running, so we rigged something onto it so it would sit in the 'correct' position without loosening, and monkeyed more with the screws. Then we took the jet out again, and tightened it up, and it started working correctly again. Now, it runs alright, but when I open it up full throttle, it bogs down. As long as I keep it about 80-85% it is fine, but when past that I need to clutch and start revving it to keep the engine running. It was doing this all along, and this is the best it has been, but I still would like to know what the issue is. Thanks guys!

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05-11-2012, 10:30 AM	#2
Tango911 Verified Join Date: May 2012 Location: Indy Posts: 29	the jet on the side, is the air screw, or could be the fuel screw, if you turned it in all the way too hard, you might have messed up the end of the screw. you should pull the carb off , take it a part and clean every jet, spray into each hole with carb cleaner and then blow it out with an air gun. if you know someone with an ultrasonic cleaner, that would help too. you might want to buy a jet kit for about 20$. Just some thoughts. You can look up what your airscrew or fuel screw setting should be for stock if your exhaust is stock and airbox.

06-09-2012, 07:34 AM	#3
punisher Banned Join Date: Jan 2012 Location: austin texas usa 78745 Posts: 16	replace the carb end of problem.update.

06-09-2012, 08:43 AM	#4
Tango911 Verified Join Date: May 2012 Location: Indy Posts: 29	yea some people do it that way, just buy new everything till you fix the prob and have more money in the bike then its worth :P

06-09-2012, 10:22 PM	#5
punisher Banned Join Date: Jan 2012 Location: austin texas usa 78745 Posts: 16	CZ carbs most which are Jickov are very unruly and hard to maintain.i have a vintage CZ 400 motorcross bike.And a new carb made it rock.