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Thread Like Summary
Allan G, Semper Gumby, Stuart Kirk
Total Likes: 3
Original Post (Thread Starter)
#859928 10/03/2021 6:47 PM
by RebelronUSA
Have 71 a65l. Bike was running before. Now I try to start it and just get a sputter out of it. Got spark and fuel, just don't want to keep running. Any ideas why? Any help would be greatly appreciated. Had this bike a year now and it's always something.
Liked Replies
#859930 Oct 3rd a 07:09 PM
by Stuart Kirk
Stuart Kirk
How long has it been sitting with the same fuel in it? Much more than 6 months or so can cause problems starting. Also, the carburetor pilot jet clogs up easily from stale fuel or from debris in the fuel.

If it's been sitting a while, drain all the fuel from tank and carb, refill with fresh and see what happens when you try to start it.
1 member likes this
#860024 Oct 4th a 03:21 PM
by Andy Higham
Andy Higham
Running for 3 seconds sounds like a carb blockage.
If it starts after tickling then stops, start it up and hold the tickler down, this will raise the fuel level and bypass the idle circuit to some extent.
My money is on a blocked pilot jet or pilot passage
1 member likes this
#861047 Oct 18th a 09:10 AM
by gavin eisler
gavin eisler
The only way to properly clean the pilot jets is a # 78 drill, anything less , spray, guitar string, wont cut it.

Clipped this from vintage bike mag.
"pilot jet can be cleaned using a #78 drill (.016″ diameter). It will have to be securely mounted in in a brass tube or equivalent. It is a confounded nuisance when the drill gets stuck in the pilot jet and comes out of the brass tube! Twirl it between your fingers in a clockwise rotation and it will draw any “swarf” down stream of the fuel flow and help prevent the drill from becoming stuck.

Yes, a guitar string can remove “swarf” from the pilot jet orifice. It doesn’t insure the jet orifice is returned to its proper size. Also the “swarf” in the jet is pushed up stream of the flow of fuel. This allows the “swarf” to flow back into the jet and potentially partially block the orifice. The guitar string technique works only if you modify the carburetor where the body is drilled and tapped to accept a modified pilot air screw opposite the working air screw. This way you can push the “swarf” down stream of the orifice. See Amal’s web site to see this modification."

The whole article is here.
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