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flatspot under acceleration

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Fireball xl5 Seriously Crusin Dubber

193 posts · joined May 2006 ·

#529656
Ive gota 1600 twin carb engine in my type 3, just changed plugs, points, leads, cap and rotor arm recently to try to cure the problem.
Butits still there, so next job is to pull the carbs off and clean them out properly, the right hand one smells more petroly than the left so think it could be an imbalance in carbs causing it.
Or is it just blocked up old carbs?

Anthiron The Baja Rejuvenation Begins

4,936 posts · joined Oct 2003 ·

#529678
when i first got my baja it had a massive flat spot

set tappets, set points, set timing correctly, rebuilt carbie

now its perfect and thats with a 009.
62/60 model bug eye baja bug, (Full Build in Progress)
1974 Chevrolet Luv
1970 MK2 Ford Cortina GT
1979 Yamaha RX125 Two Stroke tracker project.
2004 Harley Davidson Sportster XL Custom

OZ Towdster Keen to finish some projects

1,921 posts · joined Dec 2003 ·

#529681
What Fuel are you using , when i run Preium in my Manx with the old progressive carby it always had a flat spot but was instantly gone with standard unleaded.
I got the info of here but can't remember where
Don't let body work get in the way of real suspension travel

Fireball xl5 Seriously Crusin Dubber

193 posts · joined May 2006 ·

#529804
using premium with aditive as old owner told me to, will try normal unleaded and see if that helps

Joel Now containing 100\% E-Wang

9,368 posts · joined Feb 2006 ·

#529900
if ur just putting a lead substitute in dont bother vws dont need it
theyve been built to handle unleaded since leaded fuel became unavailble in the states in the 70s
my next door neighbours sister had an auto notch with a 009 and it had a horrible flat spot
its mainly 34 pict 3s and twin solexs that show up the flat spot most
but it can be gotten rid of with a small bit of work

-Joel

Midlife crisis Nartispuddlejumper, Bureau of Toxicity

2,282 posts · joined May 2003 ·

#529906
I had the same trouble with my type 3 it turned out to be the accellorator pump on one of the carbies was stuffed so rebuilt both carbies and it went fine and that was with a 009

Marc
If you can't laugh at yourself you can't laugh at anyone else! Because life is to short not to LAUGH

Fireball xl5 Seriously Crusin Dubber

193 posts · joined May 2006 ·

#530241
anyone know where to get rebuild kits for the carbs?