pingidy ping!

[400exrules]

The last few times ive been riding, i keep hearin a pinging sound from my motor. does that mean im running lean? i have an hmf slipon, uni filter, hotcam stage 1, and the lid is on. i have a 146 dynojet main. it didnt ping last year, but i just put this cam in over the winter, and its started pinging now. also, im running a mix of 93 and 110 gas to help keep it running cool.
so what is it....do i need to rejet???

[ohsobad_chevy]

Are your valves out of specs. You might want to check them.

[400exrules]

well i havent adjusted them in awhile, im going to sometime this week. but how would that make it ping? i was think i have a lean mixture and its overheating and pre-igniting or whatever

[2004exrider]

I'm gonna have to say your running lean. Did you rejet after the cam? Pop in the next size up jet and see if it still does it. What color is your plug?

Jimmy

[400exrules]

last time i checked, it was brownish black, meaning it was alittle rich. so......idk. can i just go up a size with the main jet or do i need to mess with the fuel screw or the needle clip?

[2004exrider]

So does it do it when your just riding it around or when its under a load? I was gonna say that it is your main jet but since you say its brown then im stumped.

Jimmy

[400exrules]

well, i need to check it again with a new plug because i didnt really think about it but the time when i checked it and the plug was black/brown was actually quite a while ago and it wasnt making the noise at that time.

but it pings at idle, and when riding, i think it does it when i get on it hard, but its hard to tell because my HMF is loud.

[2004exrider]

Holy crap thats not good:confused: . I'd say that you should be checking for like an exhaust leak around the header or an intake leak somewhere. The jetting shouldnt be that off, it sounds like it might be something else. Usually it would just ping under a load. Good luck though.

Jimmy

[1fst400]

my motor pinged under a hard load, like having it in the wrong gear and bogged it doun.

But if it does it all the time then you got issues.




Spark knock is my guess if it does it under hard acceleration. Is it a destinct ping. or does it kind of sound like scratching a chalk board / ping.


Your head gasket may be on its way out, I know my motor mades ping like sounds, 30 min later it blew the head gasket.

[greg_gorrell]

haha 1fst400, ill have to snap a pic of the one i just pulled out of mine, the first time it blew i pulled a head stub, so i put in a helicoil and then the next day it pulled another stud and blew it right out. i still have it laying out in the garage so ill have to get a pic.

but anyways, on this pinging subjest....are you sure its "pinging"...what kind of gas are you running? i know over here we live by the indian reservation and they sell so nasty stuff. you hotcam will not have any effect on you jetting. you jetting is affected by the airflow. any change in airflow whether it be a new exhaust or air filter will screw with your jetting. also a dirty airfilter can also affect it. i would say try some new gas and then try to describe the sound a little bit better because i dont see anything about you having a higher compression piston which would cause pinging if your running the lower octane pump gas.

[400exrules]

i dont really know how to describe it, its almost like a metal on metal sounding ping i guess, but it does it quickly, like its in time with the cycles of the engine


the first time i ever heard this noise was in the winter when it snowed here, and i rode in the snow with like 30 degree weather without changing my jetting (yes i know, dumb)......but after riding for awhile, it started to run like crap and i heard this pinging noise. and it had been fine ever since then...the weather warmed up a bit and it has been fine until about a month or so ago and it has started doing it all the time now....:confused: :huh

[400exrider707]

Have you tried running a higher octane to see if it goes away?

[firefighterjosh]

My dads C-dale does that when he gets bad fuel. If the vavle needs adjusting it should be more of a ticking sounds.

[YZROOSTINYA]

its prob the valves ticking with the new cam. It will be more distinct.

You should def not be pinging if your runnig race fuel.

you should be at about a 150 main with standard jets.

Dyno jets are differant.

[jsmith2232]

with just a pipe, header and filter i had a 146 dynojet and it was perfect, I would go up a size or two with the addition of a cam
heres a chart i pulled off of a thread on this site for jet size reference
http://www.mototuneusa.com/break_in_secrets.htm
Width------Kehein # -- DynoJets # -- Mikuni #
0,0350---- 92,5--------- 92----------- 86,3
0,0360---- 95----------- 94----------- 88,1
0,0370---- 97,5--------- 96----------- 90,0
0,0380---- 100---------- 98----------- 91,9
0,0390---- 102,5------- 100---------- 93,8
0,0400---- 105--------- 102---------- 95,6
0,0410---- 107,5------- 104---------- 97,5
0,0420---- 110--------- 106---------- 99,4
0,0430---- 112,5------- 108--------- 101,3
0,0440---- 115--------- 110--------- 103,1
0,0450---- 117,5------- 112--------- 105,0
0,0460---- 120--------- 114--------- 106,9
0,0470---- 122,5------- 116--------- 108,8
0,0480---- 125--------- 118--------- 110,6
0,0490---- 127,5------- 120--------- 112,5
0,0500---- 130--------- 122--------- 114,4
0,0510---- 132,5------- 124--------- 116,3
0,0520---- 135--------- 126--------- 118,1
0,0530---- 137,5------- 128--------- 120,0
0,0540---- 140--------- 130--------- 121,9
0,0550---- 142,5------- 132--------- 123,8
0,0560---- 145--------- 134--------- 125,6
0,0570---- 147,5------- 136--------- 127,5
0,0580---- 150--------- 138--------- 129,4
0,0590---- 152,5------- 140--------- 131,3
0,0600---- 155--------- 142--------- 133,1
0,0610---- 157,5------- 144--------- 135,0
0,0620---- 160--------- 146--------- 136,9
0,0630---- 162,5------- 148--------- 138,8
0,0640---- 165--------- 150--------- 140,6
0,0650---- 167,5------- 152--------- 142,5
0,0660---- 170--------- 154--------- 144,4
0,0670---- 172,5------- 156--------- 146,3
0,0680---- 175--------- 158--------- 148,1
0,0690---- 177,5------- 160--------- 150,0
0,0700---- 180--------- 162--------- 151,9
0,0710---- 182,5------- 164--------- 153,8
0,0720---- 185--------- 166--------- 155,6
0,0730---- 187,5------- 168--------- 157,5
0,0740---- 190--------- 170--------- 159,4
0,0750---- 192,5------- 172--------- 161,3
0,0760---- 195--------- 174--------- 163,1
0,0770---- 197,5------- 176--------- 165,0
0,0780---- 200--------- 178--------- 166,9
0,0790---- 202,5------- 180--------- 168,8
0,0800---- 205--------- 182--------- 170,6
0,0810---- 207,5------- 184--------- 172,5
0,0820---- 210--------- 186--------- 174,4
0,0830---- 212,5------- 188--------- 176,3
0,0840---- 215--------- 190--------- 178,1
0,0850---- 217,5------- 192--------- 180,0
0,0860---- 220--------- 194--------- 181,9
0,0870---- 222,5------- 196--------- 183,7
0,0880---- 225--------- 198--------- 185,6
0,0890---- 227,5------- 200--------- 187,5

[400exrules]

ok, where can i order a set of dynojets?


thanks for helping me out guys, im hoping i dont have to rebuild the whole engine because i just cant afford it now, and this is the worst time of the year for this to happen

[400exrules]

oh, another thing i forgot to mention, i just recently switched from honda GN4, to a AMSOIL synthetic oil

[jsmith2232]

I would check on ebay for dynojets or your local honda dealer.

[jsmith2232]

or you could cross reference the chart i made and use kehien jets, just pull out your adapter and put your stock needle back in. then you won't have to buy a whole kit, individual kehien mains are only like 2.00$ each

worst case could be your piston knocking against your cylander walls. Id get it checked out. I had that exact same sound in my kx 125 it made a ticl tick tick every now and then at idle. I blew my top end later that day.

[400exrules]

oh boy....not good


whats the best way to trouble shoot it?

start with my jetting, change spark plug, go back to 93 octane instead of 110/93 mix. and if the problem continues, tear it down?

[bwamos]

Re-check your cam timing before you rip it apart.

[400exrules]

ok im retarted. i was messin around today, and i started it up and was listening to the noise and i noticed i could only hear it on the right side, so i grabbed the heat shield and guess what....no more pinging:eek2: :rolleyes:
wow.....im an idiot, sorry to waste all yalls time, but thanks for trying to help. i guess its just hitting the header or somethin, because it wasnt loose, but i took it off and it didnt ping, but i put it back on tight, and i heard the pinging. so, im just glad my motor isnt about to grenade like i thought it was! thanks for the help guys lol

[1fst400]

LMAO to that.

I love it when it is stupid stuf.

[DieselBoy]

Originally posted by 1fst400
LMAO to that.

I love it when it is stupid stuf.

Me, too!

[jsmith2232]

I think weve all been there before:D

[my250ex]

hes running 146 main jeT????? look at this guy's mods! stock jetting is 148!! :eek2:

[400exrules]

Originally posted by my250ex
hes running 146 main jeT????? look at this guy's mods! stock jetting is 148!! :eek2:

look at the jetting scale on page 1, im running a 146 dynojet, the sizes are different depending on what brand your jets are

its equivalent to me running a 160 Kehein

[firefighterjosh]

Originally posted by 400exrules
ok im retarted. i was messin around today, and i started it up and was listening to the noise and i noticed i could only hear it on the right side, so i grabbed the heat shield and guess what....no more pinging:eek2: :rolleyes:
wow.....im an idiot, sorry to waste all yalls time, but thanks for trying to help. i guess its just hitting the header or somethin, because it wasnt loose, but i took it off and it didnt ping, but i put it back on tight, and i heard the pinging. so, im just glad my motor isnt about to grenade like i thought it was! thanks for the help guys lol

Well to make you feel better I took my banshee carbs apart 8 times trying to figure out why it wasnt running right. Found out I forgot to adjust the gap between the flywheel and the Initition thing (sorry can't think of the name) Once I did that it ran great!