| Author | Message | ||
     Spacecapsule1 |
Hey gang, My bike is pinging like mad! The carb is jetted 45/175. I have the denso iridium plug (racing version). It pings really bad at partial throttle...... don't know what the deal is. The carb boot is good. I haven't checked the timing though..... | ||
| Ezblast |
Vacuum or timing - probably timing. GT - JBOTDS! EZ  | ||
| Swampy |
Don't forget the tank vent! | ||
| Spacecapsule1 |
Thanks, About the vacuum, what exactly do I check? tank vent: Fuel will leak out if i overfill. Is that a good enough indication of proper function? | ||
| Swampy |
Not necessarily, air has to be able to go in also! | ||
| Spacecapsule1 |
whats the recommended method of checking the vent? ....i could blow into the end of the vent hose.... which i just did and it seems to work fine......air goes in then comes back out....... | ||
| Buellistic |
BUELLers: The way "i" cured the problem with my gas tank vent valve was to cut the check valve off !!! In BLASTing LaFayette | ||
| Spacecapsule1 |
.....so how do you know if there's a tank vent problem? | ||
| Gearheaderiko |
If you pull the gas cap off or loose and the problem goes away, then its your tank vent (or rollover valve). I personally I dont thinks its your vent. Usually that will cause a shut down at higher rpms rather than pinging. Have you changed anything lately, right before the problem started? Try putting the stock spark plug back in. Check your carb and make sure the vacuum inlet is plugged (sometimes the plug will get old and crack). Check the timing. Bad gas? Filled up with 87 (or 86) octane instead of 91? | ||
| Slowhand96 |
WHOOOPS!!!! 91 Really? I put 91.. well.. 92 actually.. in the Road King but I have been putting 87 in the Blasts. No pinging and no problems yet. I didn't think they had the compression to warrant Hi octane. | ||
| Gearheaderiko |
The swingarm says 91 and you could get away with 87, but tuning with 91 and then running 87 when the weather gets warm could lead to ping. Is it summer there in Iceland yet? | ||
| Slowhand96 |
YES!!! and it is official... MNDOT has been busy tearing up the freeways! Our two seasons.. winter and road construction. I guess I should read swingarms a little more carefully! | ||
| Ezblast |
lol - also make sure your plug wire is good, and tight! GT - JBOTDS! EZ | ||
| Spacecapsule1 |
sorry, i forgot to mention the gas, I put the highest octane gas available. 93? i think it is. the pinging doesn't change. i've tried 87, 89 and 93 with no real effect...... plug wire seems okay. fits nice and tight. i did put a bit of lock-tite on the peice that screws onto the end of the plug because i've had those come loose before... would that cause a problem? the pinging is so bad that it will loose power and i can feel the hesitation..... i will have to downshift to get the rpms up and my speed, then it seems to go away, until i hit a hill or something that cause me to loose speed again, then the pinging starts getting bad again causing me to drop speed....... | ||
| Ezblast |
Its got to be a timing issue - but I can't figure out why it would change to cause that - unless the ignition became loose - check that and adjust to manual spec - pretty easy to do, but you'll need a new timing cover. GT - JBOTDS! EZ | ||
| Buellistic |
NO YOU will not, all you have to do is use a pen knife ... The way the FACTOTY SERVICE MANUAL says is "BUELLschitte" !!! In BLASTing LaFayette (Message edited by buellistic on May 31, 2007) | ||
| Joey |
Ha! I just stick my fingernail in there and pop mine right off. It was warped new, so it's quite easy to pop it off. | ||
| Gearheaderiko |
It is quite possible its an ignition module problem. It is also possible the timing cup is loose. A loose spark plug end could also cause problems. Check the timing. HD/Buell has recommended a specific way to get the cover off as the unknowing might just jam a screwdriver right into the module. The Repair Manual way or prying it off works just as well, just be careful not to do damage. | ||
| Spacecapsule1 |
alright troops heres the timing situation: as it is right now, the led lights up before i see the 2 dots, and shuts off just as the leading edge of the timing slot comes into the sight window from the rear..... thoughts from the blast gurus? i assume this setting is too much advance? i dont know, help me get my bearings please...... i know this isn't the factory setting, but its how it came from the factory unless it moved on its own..... | ||
| Swampy |
The LED is supposed to be going off as the TDC SLOT is in the center of the window. The two DOTS are the timing marks, you can only use those when the bike is running with a timing light. | ||
| Spacecapsule1 |
i've got the timing right on the money now..... checked, test rode, re checked.... right on the money! .......STILL pinging like crazy when i have partial throttle. i'm talking very slight throttle, maybe 1/8? running high octane. 45/175 jets. stock exhaust. k&n air filter with airbox mod. whatcha think? carb trouble? i get some hesitation under full throttle and i get a little hicup when i snap the throttle shut from full open........ i have the ps exhaust waiting to install until i get the pinging fixed.... otherwise don't think i could hear it with the louder proseries exhaust... | ||
| Gearheaderiko |
Have you tried adjusting the idle air mixture screw? Have you done any other carb mods (changed springs, drilled holes,unplugged vacuum lines)? Did this start all of a sudden or after a modification? Has it always pinged? Is it the footpegs? or valvetrain? or primary chain? You also might want to try unplugging the choke/TPS connector. Just to see what happens. | ||
| Spacecapsule1 |
yes its always done the pinging thing. yes i've done the carb mods.... slide hole drilled to 7/64 which is just a shade larger than stock. did the jets, shimmed the needle. no vacuum line messed with. idle screw 2 1/2 turns out. maybe 3.... can't remember. it isnt the pegs, or the chain, already eliminated those... i thought the jets would help but they didn't. the timing was way off, but i fixed that and still the same ping.... man.......... this is frustrating. its so loud i can clearly hear it through my full face helmet...... and its embarassing too! | ||
| Gearheaderiko |
Try unplugging the TPS/choke, just to see what happens. Worse? Better? If you've changed the timing and its still as bad hmmm? I'd say go back to looking for a vacuum leak. Check boot and vacuum plug on carb (yours may be permanently plugged at the factory). Doesnt sound like retarding the timing will help if changing it didnt. Richen up the mixture (turn the mixture screw out, go to a 46 or 48 jet). Remember, only change one thing at a time and if it doesnt help,change it back before proceeding (unless, for some reason, it runs better). If it was overheating, it should be really down on power and knock and ping throughout the range (or not just at 1/8th throttle). If it was an old motor, it could be due to carbon build up. If its that loud, something must be really wrong. | ||
| Gearheaderiko |
Did you try going back to a stock spark plug (be sure its a stock plug not a wrong plug) at the correct gap? Can you check the timing with a light? | ||
| Spacecapsule1 |
sorry, no timing light. i don't have a stock plug either. i'll let you know about the vacuum tomorrow. i'll also replace the boot as soon as i can. it appears to be good, but who knows. really, the timing adjustment didn't help at all. i couldn't believe it! maybe i should retard it a bit more? right now its right smack in the middle... it only pings on very slight throttle.... nowhere else. | ||
| Ezblast |
Retard a tad, try cleaning your valves - I hear sea Foam (available at Napa, etc. - does a great job, it took 3 treatments of Sea Foam, then 2 of carb cleaner and hi octaine gas forever to stop it in the Red bike, but finally no more. I just run hi octaine now - Cheveron at that - lol GT - JBOTDS! EZ | ||
| Spacecapsule1 |
thanks guys. I'll work on it and let you know. | ||
| Spacecapsule1 |
retarded the timing a bit more....... no help. still pings like crazy. i couldn't stand it any longer and installed the proseries exhaust......... didn't really see much difference except thats its ear splitting loud.... still, i know that the pinging is there because i can feel the loss in power. gonna try the other suggestions tomorrow..... | ||
| Spacecapsule1 |
.....checked the vacuum plug, its good. unplugged the tps and went for a ride. at first i thought it was better, but after i listened really carefully i discovered the pinging was still there..... just hard to hear because i installed the pro-series exhaust. i'm going to put the stock exhaust back on until i get this thing sorted out..... | ||
| Gearheaderiko |
I'd consider doing a compression check since all our suggestions have assumed your engine is in good mechanical condition. It would help to know that it is. | ||
| Ezblast |
Your primary is adjusted - right? GT - JBOTDS! EZ | ||
| Spacecapsule1 |
yep, primary is adjusted. i just changed the carb boot just in case, but it made no difference. I did take a flashlight and looked inside the manifold at the valve....... man was it dirty! caked up carbon everywhere! i was surprised. so.... i'm running some seafoam through it now....... maybe it'll help. I don't see how considering the amount of built up gunk in there.... | ||
| Gearheaderiko |
Sounds like carbon is your problem then. I dont know what you've been running in your bike to do that....oh, the PCV vent! It must have been blowing tons of oil through there. Stays much cleaner after the line reroute. | ||
| Spacecapsule1 |
I did the line re-route over 4000 miles ago! It always seemed to leak a lot of oil to me, but i kept getting the "thats normal" routine. How do I know if the bike is using too much oil? Could the valve seals be leaking a lot? I rented a compression gauge but it didn't have the right adapter to work with my bike, so I'll go buy one sometime soon..... could my problem be a bad ignition module? | ||
| Ezblast |
ignition problems involve a lot of popping and shut downs usually. GT - JBOTDS! EZ | ||
| Swampy |
You have checked timing? While it is running? An old mechanics trick for removing carbon from the combustion chamber is to introduce water in small amounts into the intake while the engine is running at part throttle. Water does not compress so it will raise the pressure in the combustion chamber hopefully removing the carbon. You could probably use a squirt bottle to get it in the carb. Too much and you can bend a rod..LOL | ||
| Spacecapsule1 |
haven't checked the timing while running. already tried the water trick, didn't seem to do much. |
