SuzukiSavage.com - Print Page

SuzukiSavage.com
/cgi-bin/YaBB.pl
General Category >> Rubber Side Down! >> Bogging at higher rpms
/cgi-bin/YaBB.pl?num=1436385319

Message started by borjawil on 07/08/15 at 12:55:19

Title: Bogging at higher rpms
Post by borjawil on 07/08/15 at 12:55:19

I have a savage 650. Carbs have been gone through. Bike takes off well enough but towards higher rpms (not sure exactly since theres no tach) it bogs almost sounds like its hitting the rev limiter. Everything is stock.

Title: Re: Bogging at higher rpms
Post by verslagen1 on 07/08/15 at 13:10:09

What jets are you using, how thick is the white spacer, miles and any mod's?

Title: Re: Bogging at higher rpms
Post by borjawil on 07/09/15 at 08:57:26

Ill have to look again at the jetting, I do remember the main jet had the first two number pretty worn. NO mods. everything is stock as far as I know. mileage is low. Not sure on the spacer. Since it seems to be doing it past 1/2 throttle probably around 3/4-full I'm assuming the needle but I don't know much about the savage.

Title: Re: Bogging at higher rpms
Post by justin_o_guy2 on 07/09/15 at 09:23:38

I'd guess petcock.
But , first, I'd like details.
Year model, miles,
Has it been doing this?
How much riding has this rider done On This Bike?

Title: Re: Bogging at higher rpms
Post by borjawil on 07/09/15 at 11:40:16

1996 LS650, 15k miles. Just got the bike, back firing when you let off the throttle all the way. Any more than half throttle it bogs

Title: Re: Bogging at higher rpms
Post by justin_o_guy2 on 07/09/15 at 13:13:24

Years say petcock, at least. Vacuum hose to petcock, check for fuel, it's old, might be cracking at an end.
Dude, I hate to tell ya, but that mileage is scary close to cam chain tensioner checking.

Slide could be sticking,

Title: Re: Bogging at higher rpms
Post by JutMan on 07/09/15 at 13:46:41

Same problem on my 2005, replaced the petcock with the raptor, problem solved. Honestly, i did not even take the time to check it. The $22 is worth more than the time it takes to verify it is crapola.
Strange part was that it had some paint from the bike that was loose inside the tank that had to be flushed out.

Title: Re: Bogging at higher rpms
Post by borjawil on 07/10/15 at 10:00:12

Petcock looks good. Fuel drains out. Ill recheck the vacuum line but that looks good as well. Carb slide not sticking but it does look a bit worn. Any way to test the petcock? What if I just plug the vacuum nipple on the carb and petcock?

Title: Re: Bogging at higher rpms
Post by Art Webb on 07/10/15 at 10:11:07

Try setting the petcock on prime and riding it that way, see if the problem persists
If so, time for the Raptor petty (the real one, not a china knock off)

Title: Re: Bogging at higher rpms
Post by borjawil on 07/11/15 at 06:57:35

When you say a raptor petcock is that a brand/product name or the atv?

Title: Re: Bogging at higher rpms
Post by Art Webb on 07/11/15 at 07:10:30

It's the petcock for a Yamaha Raptor 660
it's a direct bolt on that's pure mechanical, not vacuum operated, and is 1000x more reliable than the crappy vacuum petcock Suzuki saddled the Savage / S40 with
remember to plug the vacuum port on the carb if you changeover
required reading:
http://suzukisavage.com/cgi-bin/YaBB.pl?num=1366651397
http://suzukisavage.com/cgi-bin/YaBB.pl?num=1344399573

Those two threads will put you miles ahead on keeping a happy relationship with your bike

Title: Re: Bogging at higher rpms
Post by borjawil on 07/23/15 at 09:50:31

Ok just replaced the petcock and I'm still having a bogging issue. Im going to go through the carb again just in case.

What else could it be? Main jet is 145 other is 52.5 which I believe were stock for this year.

Title: Re: Bogging at higher rpms
Post by justin_o_guy2 on 07/23/15 at 10:44:56

You need to look at the cam chain.

Title: Re: Bogging at higher rpms
Post by borjawil on 07/23/15 at 12:42:50

care to elaborate? As in why the cam chain needs to be looked at and why it would cause this issue?

Title: Re: Bogging at higher rpms
Post by justin_o_guy2 on 07/23/15 at 13:06:23

It won't cause this problem, but at fifteen thousand miles the tensioner may be ready to destroy your engine. Then, bogging at high RPM becomes a non issue.

Title: Re: Bogging at higher rpms
Post by borjawil on 07/23/15 at 13:22:42

OK. I appreciate the advice. Really need to get it running right first. Anyone have any other suggestions? Ive gone back through the carb. Not my first time around a bike Ive checked all my normal stops.

It revs up real well in neutral, just while under a load it start bogging. Sounds like its hitting the rev limiter almost. get up to about 25 in 1st 35 in second before it start happening. If I let up then give it 3/4 to full throttle it jumps then immediately bogs again.

Title: Re: Bogging at higher rpms
Post by verslagen1 on 07/23/15 at 14:02:09

Not to be derogatory... but you're just a noob. ;)
What do you know of stock or not?
snap off some pics man. all of us here know stock on sight. take advantage.

Sounds like you're running pretty lean...
did you change your air filter?
has your muff been drilled out?
did you check the float height?

Title: Re: Bogging at higher rpms
Post by LANCER on 07/23/15 at 14:29:19

Would be willing to bet if you replace your 145 main jet with a 150 or 152.5 you will see an immediate improvement in your upper end of the throttle range.
If not, then you missed something when "going through the carb".
There are several tiny passageways that need attention.
The 52.5 pilot jet is fine for a stocker, as long as you adjusted the pilot screw correctly.

Title: Re: Bogging at higher rpms
Post by borjawil on 07/23/15 at 15:26:50

A noob to the savage perhaps. I figured out the issue. Airfilter. I was running quite rich it seems. Problem solved. Thanks for the help.