wierd clunking/flapping noise in third gear

ClockworkMonkey · 28 Oct 2009, 6:49 pm

I was just wondering if you guys might be able to help with my problem.

When i'm accelerating hard in third... and sometimes 4th, i hear this clanning/ flapping/ indescribeable noise. when i ease off the gas it quieten's down and when i;m cruising u can't hear it. any idea what it is? i thought it might be a loose plate or someting under the gear stick ( its has a short empi ) ... but i have no clue.. i doubt its serious .. was just curious - its detdracting from the great sound of the motor 🙂

grumble · 28 Oct 2009, 7:46 pm

What fuel are you using,how much advanced is the spark,is the engine pinging? Does the noise diminish when you ease the throttle? Or does the noise sound like it is in the tunnel? These are a few easy questions to ask yourself and eliminate them one by one,obviously we can't be sure as we haven't experienced the noise. But it does sound like preignition.

Bizarre · 28 Oct 2009, 8:40 pm

Preignition is your motor destroying itself

Get your motor tuned yesterday

bushed · 28 Oct 2009, 9:19 pm

what vehicle and engine type CM ??

is it getting worse by the week?

only when mtr cold??

matberry · 28 Oct 2009, 9:25 pm

Is it gear stick bush making the shift rod rattle. Can be a harsh noise, does it go away when you put load on the stick while its happening?

vw54 · 29 Oct 2009, 6:14 am

as per above try a few things hold the gear stick as see if noise still there

do you know what a pinging noise from the engine is ???

ClockworkMonkey · 29 Oct 2009, 6:09 pm

matberry wrote:Is it gear stick bush making the shift rod rattle. Can be a harsh noise, does it go away when you put load on the stick while its happening?

thats exactly what happens 🙂 . as soon as i put a little pressre on the stick in a certain direction is stops

i just had it serviced and they said its running fine. its a single port 1500 ( i'm actually impressed at how hard this little thing goes when u put ur foot downv🙂

Joel · 29 Oct 2009, 7:30 pm

you just need to replace the shift rod bushing

ClockworkMonkey · 2 Nov 2009, 4:24 pm

Thanks dude! .. can it wait another 2000 miles til next service?

grumble · 2 Nov 2009, 7:37 pm

As you say you have just had it serviced and it was running fine it probably can if you can put up with the noise or accelerate more lightly.I would still have the other factors checked as well.

ClockworkMonkey · 3 Nov 2009, 5:16 pm

it's not that bad .. i can live with it 🙂 its due for a major service next time so i'll get it seen to. with my motorbicycle out of action i'm sure clocking up the miles fast in the o;d beast