From:Carl Henrik Stormer e-mail:bookshop@automobilia.no
Subject:RE: RE: RE: RE: Zenith T4X carburettor for DeLuxe 1927/28 Date:Tue Dec 30 07:29:16 2014
Response to:5272
Hi Dan,

The hesitation problem seems to be solved. I sent the carburettor to Dave Molnar, who found a few problems - wrong compensation jet, no air supply (hole missing)in the tube covering the idle jet suction tube. He tested and adjusted the carburettor successfully on his own 1928 Henderson, and sent it back to Norway. It is now reinstalled on my bike, and seems to function well. Temperature and snow outside makes test riding unpractical now. But in April!!

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Carl,
Any luck figuring out the hesitation issue?
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My Henderson is now fully overhauled, and the engine and gearbox is for
all practical purposes totally new, rebuilt by Jörgen Sundberg in Sweden
(Grevbo Engineering). O still have problems with the carburettor though -
hesitation when it comes off the idle (pilot) jet - a hole in the middle. I have
tried all sorts of solutions without success - new main jet (size 20) and new
compensator jet. The carb has been modified somewhat by an earlier
owner, and I suspect that perhaps the idle jet mechanism is not functioning
properly, or the choke tube (new) is too large.
I am now looking for a spare carburettor in good condition, or somebody
qualified and willing to overhaul mine to original specifications.
Is there help to be found somewhere?

Carl
Carl
Did you find a solution to your hesitation problem?

Hi Dan,

No solution yet. The symptoms are classical for a too wide choke tube
(venturi), but there are several parameters involved which may influence
the result. Dave Molnar has offered to try to find a solution, and will test the
carb on his '28 DeLuxe. I am still optimistic!

Carl