yes, running lean. I’ve went up a good bit higher on the main jet size to begin with and will come down one size at a time to try and get it right - well that’s the plan. What do you think
A plug chop will quicken the process. Heat cycle the motor to run in the new piston. Get the bike up to full operating temperature. Make sure the pilot circuit is somewhere near by judging the air screw number of turns, 1.5 to 2.5 out covers most bikes. More or less than these and it probably needs the next size pilot jet. If the screw is on the air filter side of the slide then it's an AIR SCREW. If the screw is on the barrel side of the carb then it's a PETROL SCREW. Note which one is yours, likely an air screw. Go for the highest tickover with the air/petrol screw then a quarter turn richer. Now go for a ride on a long straight bit of backroad. Run it flat out for a mile or so ( if you think the mixture is somewhere near, USE CAUTION!) and then cut the ignition with the clutch in. DONT COAST TO A HALT IN GEAR WITH THE CLUTCH OUT. Remove the plug and post a pic of the colour at the tip, plug gap end. "Rich Tea" biscuit colour is good. Hope that helps?
That’s great advice, thanks for that. It is an air screw it’s at 1 1/4 turns but I’ll set it as you describe. I’ve only run the engine for an hour and have been taking it easy, this is what the plug looks like with this initial running. I’ll do a plug check flat out next time I am out. What do you think of how it looks while running in?
Posted this on my new bike thread, but I'll put it here as well... Put a replacement exhaust bracket on - also Unit Garage - in addition to the new end can and link pipe as it matches the frame. All done, though, and I'd describe the whole job as very fiddly rather than difficult. Look and sounds amazing. Happy Boxing Day, everyone
That looks something like colour wise, but it doesn't indicate main jetting unless run flat out then ignition chopped. 1 1/4 turns out sounds ok but try adjusting for the highest tickover once warmed up. Doing it in 1/8 turn increments and allowing time to judge the effect, should show a sweet spot. You want to aim to be just slightly on the rich side of that sweet spot.
I am still a bit scared to hold it flat out so gave it a quick rev through the gears for a bit then cut the engine flat out in fourth. I’m thinking still a bit lean? what do you think
Yes looks slightly lean so I might be tempted to go up x2 sizes on the main jet and then note the result. Another option is to give it choke when warm and flat out, you'll soon know (safely) if you are pushing the too rich boundary. The above was an old trick for trials bikes used on fast road sections, don't forget petrol also acts as a coolant on the piston crown.
Excellent thanks very much for that, much appreciate you giving your knowledge and help. I’ve ordered more jets from wemoto they are usually quick. I’ll post a plug chop pic when they arrive.
For the youngest sons Kawasaki kmx 125, we bought a Chinese set of pilots and mains. I think they only worked out about £10 a box of x10 sizes, so £20 in total.
Helmut and I took the Ducatis out to meet some friends at HR4K today, it was chilly enough to be a multi - layered trousers day. A very short ride, but nice to go and have a coffee and a chat .
Yesterday afternoon I went out to the garage to switch the positions of my Low Rider and my Street Glide so my Street Glide would be ready to roll for this morning's ride. I turned around for a moment or two and look what magically appeared on the trunk of my car. My hubby makes the best Bloody Marys!
Thanks Sandi. My wife and I spent 3 hours on Christmas Eve having an emergency appointment with my consultant, one of the pins came out in the night, the good news for me was he patched me up, and the pins are hopefully coming out on New Year's Eve. A few weeks after that, and I should be able to get footwear on. Then all that's needed is a bit of good weather, and vroom, I'm off again.
Our Sunday ride yesterday was a bit longer than typical since we're between holidays and folks (those of us still working) have some extra time off. Steve and I even enlisted our beloved dog sitter, Marilyn, to come hang out with Ellie for the day so we didn't feel compelled to rush home. Consequently, we actually made three stops since we were in no hurry. One for breakfast in Patagonia (AZ not South America), Tubac, and our local Harley dealership. We had a nice turnout of seven--four Harleys, one Yamaha Tracer, and two BMW GS's. This was our route--counterclockwise starting at our usual QT gas (petrol) station and ending up at Harley. I closest we were about 18 miles from the Mexican border but could see well into Mexico from some of the higher vistas. Our breakfast joint for the day--Gathering Grounds in Patagonia. Tubac which is off Interstate 19 and is a great little art community with some high falutin' art along with lots of kitsch. Unfortunately, the Grumpy Gringo cigar store is closed on Sundays. Steve and I wanted to take Russell there to get his cigar collection started. We got him a small but tasteful humidor for Christmas. This horse is made entirely from parts! And many are motorcycle parts--gas tanks, exhaust, you name it! I loved these three red chili peppers holding--from left to right--a beer, a martini, and a glass of wine. We may have to go back for these guys. Our last stop of the day. By this time there were only three of us left--Steve, Chas, and me. Partly we just wanted to keep riding since it was such a beautiful day! With rain in the forcast for later in the week... The temperature when we arrived home. It was about 50ºF when we left home earlier in the day. Cold for us though not for many of you. All told, 170 miles on the clock for the day. And my Street Glide is dangerously near its 20K service. I say "dangerously" because motorcycle shop labor charges seems to have skyrocketed recently. As I mentioned in a previous post, "Fun is expensive!"
@Sandi T that looks like a great day out and it must have been nice to have time to relax with friends knowing that Ellie had company; I used to dislike the clock watching that came with having beautiful Rudi as I didn't want to leave him alone for too long and it used to add a little bit of pressure to the day. Your weather looks spectacular. I love the horse; we have a dog on one of the sites at work made from knives and firearms, it is amazing "in the flesh". These photos are taken from the internet when it was new, now it has been weathered for a few years, it looks even better.