Hello Everyone,

So I'm having a bit of a scare right now. My bike has 920 miles on it, and I just noticed a "clack" noise while riding today. I'm sure part of all this should be expected, but it seems so...loud? or distinct? it's worrying me.

So what happened was, I was sitting at a stop light, engine at operating temp, light turns green, and I "dumped" about 1/4 throttle on it instantaneously. I would imagine that to a degree, some sort of different sound is normal but still, the first time I heard it, (I know it probably wasn't), but it sounded like a piston was tapping the valve, or hitting against it. I'm sure I'm being dramatic, but this is like an infant to me, a little cut would seem like a lost limb. When I got home, I made a video with my phone, I'm gonna put a link in this post. Listen for it right when I give it throttle, there are one or 2 distinct moments, 0:03 and 0:42 seemed to be them. Now, I think youtube's encryption, lowers the volume for the moments where the clack was, or maybe it was my phone, so it was actually a lot louder in person. I hope y'all are able to tell by the video what the noise is.

If this is something of concern, the bike is still under warranty and I would probably take it in to have it checked out.

Does anyone know if drilling out the little brass plug on the carb fuel/air screw "voids" warranty? I wouldn't want them to say "Oh you tampered with this plug, we can't help you."

If ANYONE, has any input on this, it would be greatly appreciated.

http://youtu.be/xfqLaXxBQ_M

Thanks a bunch!

-Devon

I know that sound, they all do it to some degree.
have you had your 1st valve adjust?

verslagen1 wrote on 10/22/14 at 19:40:37:


No, I was told that valves shouldn't need adjusting in the first 1000miles.

Should I?

I'm about to do my 1000mi oil change.

Thanks!

I plan on hitting the tech section up. I try to use it as much as possible before posting a thread.

So were you advising AGAINST using a clymer? I was planning on buying one unless it's misleading.

savskad wrote on 10/22/14 at 20:11:58:


No, he means GET a Clymers.... and READ the Clymer ERROR section on this site. The Clymers has several errors in print, these guru's have found and edited them.

And I am with the others.....don't tromp the throttle so fast then dump...ain't good for it.
At 960 miles on it, it is broken in, but its never healthy to a bike to tromp the throttle and pop the clutch.... you can do it, and the bike will jump to your command, but... it weights 400+ lbs, you weigh, well average male 175+, so you are trying to move 600+ lbs instantly.... parts is parts and they will eventually wear out.
Listen to a few more savages and s40's on the you tube... they sound just like yours.
Follow your manual for ALL adjustments until the warranty runs out, if you want to be safe

Personally, I would let "them" do the first oil change as part of the warranty service. I feel you shouldn't touch the idle screw plug yet, I'm not in the US but I feel any large corporation will use any legal pin hole or pettiness to worm out of a warranty claim.

If your idle is a tiny bit low,... or your engine is stone cold,.. or you accidentally took off in second gear. . you can get a hard clack...
It is premature ignition...

A little more rev and smoother clutch release, will avoid it...

It's only when release drops revs so fast that spark happens ahead of TDC...
It's a temperment of big singles to do this...

Bid thumpers have a lot od character... ...

justin_o_guy2 wrote on 10/22/14 at 22:51:05:


To all who have contributed, I respectfully acknowledge your input. I am however clinging to justin o guy2's advice due to the fact I will be able to sleep at night with his advice. Otherwise I will stay up all night im stress about whether my thumper will live to see another 1000mi. But please,  don't hesitate to add, all advice is welcome and greatly appreciated.