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Message started by Waldosrevenge on 08/31/16 at 00:37:13

Title: Odd Bike Action
Post by Waldosrevenge on 08/31/16 at 00:37:13

Hello, about two or three months ago I bought a 2007 S40. At first I had absolutely no problems, then out of nowhere the engine started to act very sluggish. Its a 650 and before I had no problem getting up to 60 without feeling like I was pushing the bike too hard. Now I feel like getting up to 60 is doable but it also feels like its pushing high rpms. Around the same time the exhaust started to whistle, which turned out to be a loose rivet on the exhaust. The mechanic told me that if I pull the choke out half way that it would run better, I did try this and it did kinda work but there is still the power issue. It still has a hard time getting to 60 without feeling like its at a high rpm. This problem did was not there when I first bought the bike but it seems like it has appeared out of nowhere. Does anyone have any suggestions?

Title: Re: Odd Bike Action
Post by justin_o_guy2 on 08/31/16 at 02:31:19

How many miles on it?
Any maintenance done?

Title: Re: Odd Bike Action
Post by Waldosrevenge on 08/31/16 at 04:51:21

Currently there is 7200 miles on it, I have not had any service yet. I did get a mechanic to inspect the bike and he found nothing wrong, though I am not sure how far he dove into it because we were both kinda confused by the problem. I bought it used three months ago and had no problems up till about 6800 miles.

Title: Re: Odd Bike Action
Post by justin_o_guy2 on 08/31/16 at 05:04:15

I don't understand
Sluggish.

What oil is in it?

Title: Re: Odd Bike Action
Post by batman on 08/31/16 at 06:14:31

WE really need more info, stock jetting? white spacer mod? clutch cable adjusted? stock petcock? You need to be able to check over the bike yourself .carb . been cleaned? these bikes should be able to go 85-90 miles an hour in factory trim, but yours must have sat around a long time to have that low mileage ,could be carb is dirty,seeing you had to choke it to get it to run a little better.

Title: Re: Odd Bike Action
Post by Waldosrevenge on 08/31/16 at 06:30:51

Its all stock. How I mean when I say sluggish is that there is a lack of power. It feels as if it is going slower than it should be going. At first it would have no trouble going 60 but now its running at a high rpm at 60 ( or at least feels like it)

Title: Re: Odd Bike Action
Post by justin_o_guy2 on 08/31/16 at 06:36:36

High RPM, low speed.

Slipping clutch?
What oil is in it?
Is there any slack in the clutch lever?
Where is the pointer on the clutch cover?

Title: Re: Odd Bike Action
Post by batman on 08/31/16 at 07:33:41

^^^^ what JOG said! MORE INFO!

Title: Re: Odd Bike Action
Post by ohiomoto on 08/31/16 at 07:55:56

If the condition improves when you pull the choke half way out, it could be that you are running lean. Have you pulled the spark plug?

I would pull the plug and check the vacuum line that goes from the tank to the right side of the carb (if you have the stock petcock). That's a built in air leak waiting to happen on our bikes.

Mine was leaking there for a few days and the bike was running very lean. A lot like you described. Pulled the spark plug and it indicated a lean condition. Replaced the vacuum line plug (my bike has a raptor petcock so the line has been removed) and it's running much better now.

The slipping clutch would be another place to look. Make sure there is a little play in the line.

Title: Re: Odd Bike Action
Post by justin_o_guy2 on 08/31/16 at 08:11:33

Plenty of stuff to check out before pulling the tank off to get to the plug.
IF you do pull the plug, clean the crud from down in the recess it sits in First.

The
Slow speed and high RPM says
Clutch.
Answer the questions, and we solve it.

Title: Re: Odd Bike Action
Post by engineer on 08/31/16 at 09:05:39

Unless your clutch is slipping your RPM at any given speed while in the same gear will always be the same and you did say it only "feels" like higher RPM. But you were definitive about it being sluggish at higher speeds and that could mean a faulty petcock failing to supply adequate fuel. A petcock is easy and cheap to replace. Read the thread named "petcock? fuel issue at full throttle" that is also active at this time.

Title: Re: Odd Bike Action
Post by justin_o_guy2 on 08/31/16 at 10:05:18

The less than experienced mechanic can use words that confuse.
Sluggish on the speedometer while the motor is screaming?

Title: Re: Odd Bike Action
Post by Yoshi on 08/31/16 at 10:31:42

What oil did you use? This bike has a wet clutch system and car oil will make the clutch slip...

Title: Re: Odd Bike Action
Post by justin_o_guy2 on 08/31/16 at 11:01:21

524D4B4C51566757675F4D410A380 wrote:

High RPM, low speed.

Slipping clutch?
What oil is in it?
Is there any slack in the clutch lever?
Where is the pointer on the clutch cover?

We need questions answered and terminology better defined.

I'm betting on the clutch slipping.

Why i s the next question.

Title: Re: Odd Bike Action
Post by ohiomoto on 08/31/16 at 12:06:33

5647566F636D6774756D6F060 wrote:

What oil did you use? This bike has a wet clutch system and car oil will make the clutch slip...

Good point. Wrong oil=clutch slippage as JOG is suspecting.

Title: Re: Odd Bike Action
Post by batman on 09/01/16 at 12:39:17

I don't know if this has anything to do with sluggish, but how many of us had a loose rivet in our muffler? Are the rivets factory ,has someone been in there? I wonder what else is loose inside,baffle?rust? this bike is older ,few miles, it must have sat around a long time ,how was it stored? I think I'd be looking for a Harley muffler!

Title: Re: Odd Bike Action
Post by justin_o_guy2 on 09/01/16 at 12:45:07

. It still has a hard time getting to 60 without feeling like its at a high rpm. This problem did was not there when I first bought the bike but it seems like it has appeared out of nowhere. Does anyone have any suggestions?

OP doesn't seem to care as much as we do.
Questions are unanswered.
Engine runs apparently high RPM. Not an indication of a plugged exhaust.
The report, carefully read, seems to indicate a slipping clutch.

Title: Re: Odd Bike Action
Post by Chase on 09/04/16 at 01:57:41

Is it starving of fuel with stock petcock?

Set petcock valve to "Prime" take her out bet it will run better. If it does go buy a raptor petcock and solve your problem.

Title: Re: Odd Bike Action
Post by justin_o_guy2 on 09/04/16 at 02:06:55

Chase, I don't think he really cares,,

Title: Re: Odd Bike Action
Post by Chase on 09/04/16 at 05:23:35

Maybe issue is resolved and we will hear back from him when has another problem

Title: Re: Odd Bike Action
Post by justin_o_guy2 on 09/04/16 at 05:47:02

Based on the wording of the explanation of the problem I don't think he has the mechanical know-how to solve it. Maybe hauled it to a shop where some genius will change the clutch guts out and change the oil and hopefully not install the filter bakkerds.
Hopefully they will understand it's the clutch,, that is sure what it sounds like.

Sluggish with the engine running at high RPM.

Usually
Sluggish
Is an engine that doesn't want to get to
High RPM.

Title: Re: Odd Bike Action
Post by batman on 09/04/16 at 17:41:07

Ithink this guy may be Houdini,no reply!

Title: Re: Odd Bike Action
Post by verslagen1 on 09/04/16 at 17:57:17

maybe we need to do a seance?

Title: Re: Odd Bike Action
Post by justin_o_guy2 on 09/04/16 at 19:07:13

Maybe he decided we didn't know enough to help out.