• Death Rattle?

Posted: **Mon Apr 11, 2011 9:50 pm**

Oh dear, pistons hitting valves?

Whatever it is, no worries- motors are easy to get for these.

Posted: **Thu Apr 14, 2011 2:06 pm**

Re: Death Rattle?
by trademe900 » Sun Apr 10, 2011 9:43 pm

You don't mention the most important bit- where is the sound coming from exactly?

It sounds like it idles fine... was it actually running rough and down on power etc? If not then probably is something minor that's loose.

i have a problem with my rvf, when i accelerate i have a chugging coming from the bike round the front end somewhere, down on power, idles fine though and starts fine, only when i ride it makes the noise in all gears.
what could this be?

Posted: **Thu Apr 14, 2011 5:00 pm**

I would hazard a guess at either piston ring fecked or as trademe900 mentioned fecked valve. it sounds from the clip that it is doing it from tick over and the noise is rev related.

Posted: **Fri Apr 15, 2011 10:05 am**

It doesn't sound good

I had a similar rattle coming from my nc30's top end turned out one of the dowels that secure the rocker arms had worked its way out and one of the arms was flapping around

. It made an absolute racket it was easy to tell where it was coming from, fortunately no damage done but dont run it till it's fixed

Posted: **Fri Apr 15, 2011 11:24 am**

Yer hopefully just something deceiving like that.

Keep us updated man, don't often hear of NC30's just deciding to shit themselves like this!

Posted: **Fri Apr 15, 2011 12:04 pm**

trademe900 wrote:Yer hopefully just something deceiving like that.

Keep us updated man, don't often hear of NC30's just deciding to shit themselves like this!

Rev limiter from cold? It's pretty harsh treatment for any engine.

Posted: **Fri Apr 15, 2011 12:10 pm**

Not so sure, these are strong motors, once like that probably wouldn't blow it. I've known them to take a lot worse.

Wonder if he dropped something inside the inlet manifold whilst taking out the restrictors and it started getting caught up in the top end at the petrol station?

Posted: **Fri Apr 15, 2011 8:18 pm**

Hello, I managed to have a quick peek in the head this evening and found this little fella had escaped:

IMG00022-20110415-1918.jpg

IMG00023-20110415-1923.jpg

It got dark quickly so will have a look at the front and check the clearances next week and see if there are any other shims missing.

Then I'll put it back together and cross my fingers!!

Posted: **Fri Apr 15, 2011 8:23 pm**

How can that happen?

Posted: **Fri Apr 15, 2011 8:31 pm**

krisztian_andre wrote:How can that happen?

Either to many revvs or
Shims too loose, bust probably too many revvs
Glad you found the problem, and it's not too serious