john650
retired mathsteacher..yay
Hi, I'm pleased to say that my 1975/6? engine/frame no. 447-120904 is a joy to ride.
She starts easily on the choke and when after 20 seconds or so, the choke is turned off, she settles down to a steady idle.
Only done about 150 miles since new barrels/pistons,camshaft..... so haven't taken the engine to more than 4000 rpm yet.
She picks up cleanly, runs smoothly, and there is no popping or spitting on the over-run.
I checked the plugs colour, because I was unsure what effect the Heiden high-performance camshaft would have on the fuelling. The plugs are both very light grey, where I would be more comfortable with a light tan colour.
I have checked the numbers on the pilot jets (45) and main jets (126) and the needle clip position is 4 from the top.
I was a bit puzzled at 126, because the sizes available from Mikesxs/ Heiden seem to go up in 2.5 increments. The other puzzle is that the mixture screws did not seem to have much effect during initial set-up, so I left them at 0.75 turns out.
My question is what to do to get the engine running a tad richer? Do I need to go back and get the pilots right (when it is running so well anyway), and what is their overall effect on the plug colour?..................Thanks for any help.
She starts easily on the choke and when after 20 seconds or so, the choke is turned off, she settles down to a steady idle.
Only done about 150 miles since new barrels/pistons,camshaft..... so haven't taken the engine to more than 4000 rpm yet.
She picks up cleanly, runs smoothly, and there is no popping or spitting on the over-run.
I checked the plugs colour, because I was unsure what effect the Heiden high-performance camshaft would have on the fuelling. The plugs are both very light grey, where I would be more comfortable with a light tan colour.
I have checked the numbers on the pilot jets (45) and main jets (126) and the needle clip position is 4 from the top.
I was a bit puzzled at 126, because the sizes available from Mikesxs/ Heiden seem to go up in 2.5 increments. The other puzzle is that the mixture screws did not seem to have much effect during initial set-up, so I left them at 0.75 turns out.
My question is what to do to get the engine running a tad richer? Do I need to go back and get the pilots right (when it is running so well anyway), and what is their overall effect on the plug colour?..................Thanks for any help.