Racing Nikki issue

Kim · 05-10-2010, 03:05 AM

Hey Guys

I have a racing Nikki on a streetported 12A.
Well the thing is, as soon as the engine is running it feels like the throttle has to overcome a very strong vacuum, I really need to press the pedal hard to overcome the "binding"

Any inputs are appreciated.

Kim

Kentetsu · 05-10-2010, 10:11 AM

There is a part of the linkage that looks like a rod with a spring on it. This is supposed to rest on a pivoting "hook", but is often left loose and allowed to drop down. This is referred to as the "teeter totter". If you conduct a search, you should find info on it. This is you most likely suspect.

You can also do some more research over at www.sterlingmetalworks.com , where there is a wealth of information on Nikki carbs.

Good luck.

.

Kim · 05-10-2010, 12:55 PM

Only sprung rod on this carb is for the acc.pump
The problem is only when the engine runs, when it's shut off - no problem.

Primaries and secondaries open together.

orion84gsl · 05-11-2010, 11:44 AM

If I'm not mistaken you should be using the black spacer between the manifold and carb.

Kentetsu · 05-11-2010, 12:24 PM

Either you are psychic, or there are photos that I cannot see.

djmtsu · 05-11-2010, 03:11 PM

Quote:

Originally Posted by orion84gsl

If I'm not mistaken you should be using the black spacer between the manifold and carb.

I was just going to suggest that.

Quote:

Originally Posted by Kentetsu

Either you are psychic, or there are photos that I cannot see.

You can't see the pics??

Kim · 05-11-2010, 06:25 PM

Hmm - thanks guys.

How could I forget about the spacer

orion84gsl · 05-15-2010, 09:00 AM

Let us know if that works out for you.

Kim · 05-15-2010, 02:52 PM

I will check it in the week to come, racecar is at my friends place. Thanks

Kentetsu · 05-17-2010, 09:33 AM

Yeah,the filtering at, um, the place I'm at right now, won't let the pictures through if they are hosted. If the pics are uploaded to the site, then I'm fine.

Quote:

Originally Posted by djmtsu

I was just going to suggest that.

You can't see the pics??

05-10-2010, 03:05 AM	#1
Kim OBEY YOUR MAZDA Join Date: Mar 2009 Location: Denmark Posts: 28 Rep Power: 0	Racing Nikki issue Hey Guys I have a racing Nikki on a streetported 12A. Well the thing is, as soon as the engine is running it feels like the throttle has to overcome a very strong vacuum, I really need to press the pedal hard to overcome the "binding" Any inputs are appreciated. Kim

05-10-2010, 10:11 AM	#2
Kentetsu RCC Contributor Join Date: Feb 2008 Location: Grand Rapids, Michigan Posts: 530 Rep Power: 18	There is a part of the linkage that looks like a rod with a spring on it. This is supposed to rest on a pivoting "hook", but is often left loose and allowed to drop down. This is referred to as the "teeter totter". If you conduct a search, you should find info on it. This is you most likely suspect. You can also do some more research over at www.sterlingmetalworks.com , where there is a wealth of information on Nikki carbs. Good luck. . __________________ "Learn from the past, or it will become your future...." '85 GS 12a + LSD/Sterling carb/Respeed coilovers/Respeed front swaybar/Respeed adj. rear spring perches/Illuminas/Bilsteins on rear AutoX vids @ http://www.youtube.com/user/Kentetsu1

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05-10-2010, 12:55 PM	#3
Kim OBEY YOUR MAZDA Join Date: Mar 2009 Location: Denmark Posts: 28 Rep Power: 0	Only sprung rod on this carb is for the acc.pump The problem is only when the engine runs, when it's shut off - no problem. Primaries and secondaries open together.

05-11-2010, 11:44 AM	#4
orion84gsl Rotary Fanatic Join Date: Mar 2008 Posts: 167 Rep Power: 18	If I'm not mistaken you should be using the black spacer between the manifold and carb.

05-11-2010, 12:24 PM	#5
Kentetsu RCC Contributor Join Date: Feb 2008 Location: Grand Rapids, Michigan Posts: 530 Rep Power: 18	Either you are psychic, or there are photos that I cannot see.

05-11-2010, 06:25 PM	#7
Kim OBEY YOUR MAZDA Join Date: Mar 2009 Location: Denmark Posts: 28 Rep Power: 0	Hmm - thanks guys. How could I forget about the spacer

05-15-2010, 09:00 AM	#8
orion84gsl Rotary Fanatic Join Date: Mar 2008 Posts: 167 Rep Power: 18	Let us know if that works out for you.

05-15-2010, 02:52 PM	#9
Kim OBEY YOUR MAZDA Join Date: Mar 2009 Location: Denmark Posts: 28 Rep Power: 0	I will check it in the week to come, racecar is at my friends place. Thanks