| Author | Message | ||
     Barthautala |
I put on a new V&H Slip on and replaced the intake with a carbon fiber one. Once warm it started to ping so I did a search on here and found I needed to replace the main jet so I did so with a 180. It still pings when it gets warm. Should I go down to a lower main or replace the plugs with that of a lower temp? Or both? Im sure some has done this and knows the answer right? Thanks in advance. | ||
| Natexlh1000 |
It didn't ping before? My X1 pings off the line when it's hot. | ||
| Bookyoh |
I have had good success on my M2 with putting a washer (HD p/n6048) under the slide needle. That seemed to cure my 2500 - 3500 mid throttle pinging. My 70 - 80 MPH pinging is very fuel sensitive. I try to buy 93 octane from a premium only pump or a 3 hose pump. 92 octane from Speedway will definitely ping at highway speed. Mark | ||
| Patrickh |
I am not trying to be a jerk but are you sure it is pinging. The carbon fiber aircleaner makes distinctly different noises from the breadbox. Is the main jet the only adjustment you made to the carb? Did you touch the idle screw adjacent to the float bowl on the underside? Did you pull the plug and look at it? What color is it? Does it look like it is burning lean? Did you replace your intake seals when you removed and reinstalled the carb? I replace mine every two years. I would not make two changes at the same time (ie. changing a jet and running a cooler plug), it goes aginst the scientific method, but some have seen good results with a cooler plug. I was having some pinging problems after I installed a race kit after running the breadbox for two years. Carbs are tricky, there are tons of variables. | ||
| Kenm123t |
Did you change the already to small low speed #42 jet to a # 45 If you dont look forward to rocker box leaks as you over heat them and they work out from under the cover screws. When your running hi rpms vacuum drops off and your rocker boxes leak | ||
| Barthautala |
I changed the low speed in 99....cause I knew it was too small then. Yes Im sure its pinging. And its LOUD. And its under heavy load. Like in the 2500 - 3500 range in 2nd gear and up. I changed down to the 180 main and cleaned off the plugs and ran it for 211 miles. I checked the plugs and theyre a black grey color. Better than the black they were before but I think still a little dark. I was thinking about going down to a 175? | ||
| Bomber |
Bart Pinging and rich-lookin plugs seem to be saying two different things -- pinging is generally caused by too much heat or ignition advance -- if you've not messed with the timing, it's unlikely to have moved on it's own -- this leaves running lean as a possible cause, but your plugs seems to be saying that, if anything, you're running rich if it was me, I'd check the low speed mixture screw (mentioned above -- start about 2.5 turns out) -- then check the three intake seals (one at the carb/manifold junction, one each at both of the manifold/head junctions) check the VOES lastly, or, rather, firstly, did you make any changes at all to the bike just before it started ping? | ||
| Natexlh1000 |
Oh yeah! the VOES might not be retarding the ignition under load. That would probably be a good thing to check too. | ||
| Barthautala |
Yeah I made all the changes noted above. Exhaust and intake. Then I had black plugs and pinging so I changed the main to a 180 from a 195 and it helped until the bike gets warm and it starts pinging again. It even seems to be doggy when I take off from a stop light after its warm and pings. When its cold it runs great. No pinging at all. Also it started backfiring once on cold starts. (Message edited by barthautala on June 01, 2006) | ||
| Natexlh1000 |
Sounds more and more like too much advance at low vacuum situations. I vote VOES switch or something like it. | ||
| Bomber |
it's very easy to unplug the electrical connection to the VOES inadvertantly -- also easir to bust the wire in a manner that doesn't reveal itself to a casual visual inspection -- also, keep in mind you've got to disconnect the VOES from the carb to do jetting work -- it might be easy to forget to reconnect the hose to the carb's vacuum fittin (though I've certainly be guilty of such a thing ;-} ) generally, the device itself is pretty reliable | ||
| Patrickh |
I agree with everything Bomber has said so far, but... I actually had a VOES fail on me. After you check the VOES wiring harness, you can check if it is working with a Mighty Vac and adjustable volt-meter. I'll go into detail if it is something you want to try. | ||
| Oldog |
One other thought here folks, you have carbon loaded plugs if enough carbon is in the combustion chamber local hot spots can form, See the FSM here, generaly speaking does not the main jet effect running from about 1/4 throttle up, with the other jets and adjustments effecting areas of operation ie the needle & jet from off idle to about mebe 3/4 full, idle jet if present from idle to mebe 1/8 throttle air jets or adjustments effect all ranges to a degree. | ||
| Phat_j |
oldog is correct, too much carbon can cause pinging....... infact, so can too much fuel..... as far as the jets go, the idle/lowspeed infact effect the entire range 0-100% just that it effects at a lesser amount the more open the carb is.... but as a general rule, yes 0-25% is a good number..... 25-75 on the needle, and 25-100 on the main... | ||
| Barthautala |
Wait, what? I was thinking, but Im probably wrong, if the VOES was bad wouldnt it ping ALL the time and not just when its warm? Oldog - phat_j...........youre saying I should do what? Try a smaller main? Someone on here went down to a 175 on their M3 main.........using a air fuel mixture meter. It just seems to me that someone on here with a S1W has done this before (intake and pipe) and knows exactly what to do. | ||
| Patrickh |
When VOES goes bad it pings when it is hot and under load. At least that is my experiance. Climbing a hill was especially bad. | ||
| Patrickh |
BTW, if it is excess carbon in the combustion chamber, your problem is that you have already built up deposits and a carb change won't clean off your pistons and valves. Lift your rear wheel off the ground and pull the spark plug. Rotate your rear wheel with the transmission engaged until you can look at the piston crown by aiming a flashlight in the plug hole. It you have a lot of build up then carbon might be your problem. Oldtimers used to warm up the engine and mist some water into the plug hole. They would then crank the motor and watch all the carbon blow out of the spark plug hole. Valvoline and Mopar both make a combustion chamber cleaner, but is it designed to work with fuel injection. If carbon build up is indeed the problem it might be a good time to pull the heads and clean everything up, new rings, smooth the bore, lap the valves ect... (Message edited by patrickh on June 05, 2006) |
