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General Category >> Rubber Side Down! >> Rev Limiter
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Message started by Uturn74 on 07/03/16 at 11:57:36

Title: Rev Limiter
Post by Uturn74 on 07/03/16 at 11:57:36

I have a 2013 S40. Was wondering if it has a rev limiter. I was out a few weeks ago and really wanted to see what the bike could do. I think I ran the bike up a little to hard because now it seems a little noiser and has a little more vibration when running around 50 and above.

Title: Re: Rev Limiter
Post by Uturn74 on 07/03/16 at 12:11:18

Also the bike has 5,900 miles on it.

Title: Re: Rev Limiter
Post by justin_o_guy2 on 07/03/16 at 12:14:09

How many miles on it?
Dunno if it has a limiter.
I wouldn't run it all the way out in a gear other than high gear.
Shift up when you get to the end of the good pulling part of the acceleration.

Title: Re: Rev Limiter
Post by Uturn74 on 07/03/16 at 12:28:06

Yeh, I didn't shift soon enough. Was on an on-ramp and was feeling good and playfull. Ran the revs up a little too high before shifting. The exhaust started to sound different right before I shifted, It got alot louder. It sounds normal now but the engine valve train noise seems a little louder then before now. And I think there is a little more vibration at higher speeds. Just trying to find out if I'm being paranoid or if I need to take it to a shop.

Title: Re: Rev Limiter
Post by justin_o_guy2 on 07/03/16 at 13:13:03

Have you checked the valves? That's a 5000 mile thing.
The adjusters look like a pencil with the lead mashed blunt. As they smash into things they mushroom and work harden, eventually not needing adjusted so often.

It's possible that you rattled some crap loose in the exhaust.
Listen for Where the noise is coming from.

Is there rust obvious on or in the exhaust?
If you gas it, can you see anything come out of the exhaust besides exhaust?
Is it backfiring more ?

Is the pipe blue near the head?

Title: Re: Rev Limiter
Post by gizzo on 07/03/16 at 15:41:28

Please do keep us informed of what you find when you pull it down. I wonder if a valve spring broke, letting the valve float at the higher rpm (it has dual springs, so the one could probs control the valve at modest rpm).

Title: Re: Rev Limiter
Post by Boofer on 07/03/16 at 19:13:21

Uturn, I wouldn't worry about it too much. I think you are paranoid, because the muffler changed internally causing a different sound. I KNOW my bike sometimes vibrates more at some times than others, even on the same ride after gassing up or taking a break. Never figured it out. And my muffler spit the baffles out at 8000 miles (A 2001)

I recommend an oil change with or without a filter (unless it's time anyway) and use Rotella T
regular dino oil 15w45. It will reduce engine noise more than synthetic. It will take you 20 minutes and you will hear the difference. keep posting and figure it out before you spend a lot of time and money. Be patient.

Title: Re: Rev Limiter
Post by justin_o_guy2 on 07/03/16 at 19:30:30

Finding 15/45 will take a while..

Rotella T 15/40
Gallon is about 13.00.

Title: Re: Rev Limiter
Post by Boofer on 07/03/16 at 19:55:02

Yeah, what he said. :-[

Title: Re: Rev Limiter
Post by Uturn74 on 07/04/16 at 08:27:12

I bought the bike with 5400 on it. Thought it had the initial valve adjustment done but could never get a straight answer. Thanks for the info. I've been wanting to do an oil change on it in the next few weeks anyway. Might see if I can get my brother to help me check the valves when I do it. Apartment living with very limited tools hinders what I can do on my own.

Title: Re: Rev Limiter
Post by Kris01 on 07/04/16 at 15:49:49

There's a very old thread around here about this very "problem". The consensus was that there is not an electronic governor built into the ignition system. Chances are the head is not flowing well above ~6500 rpms so the engine speed stops climbing. Have you seen the horrible exhaust port? ;D ;)

Title: Re: Rev Limiter
Post by KennyG on 07/04/16 at 17:12:01

Uturn,

If you have noticed an increase in vibration check the front foot pegs, the through bolts that run through the engine, and the handle bar and the fork bolts for tightness.

Kenny G

Title: Re: Rev Limiter
Post by justin_o_guy2 on 07/04/16 at 18:18:10

Good point, Kenny.

Title: Re: Rev Limiter
Post by batman on 07/05/16 at 21:27:36

Lets not forget there's motor mounts on top ,under the gas tank .I don't believe me have a rev limiter but the cdi 's advance is maxed out at 5000rpm if I recall.