Since I bought my S40, I have had problem with my engine.

whenever I push hard the throttle and then release it, the engine stalls or even stops.

I replaced the petcock with the raptors and it was better but stills tend to stall.

this is a video showing the problem
https://www.dropbox.com/photos/shared_space/mrn13DhK8zgfJRz

I hope Someone knows how to fix this>

Thank you very much!

Albert Verdugo wrote on 08/07/15 at 19:18:07:


don't do that... there fixed it for you.  

Albert,

When my S40 did what your bike is doing the idle speed was a little low as Justin stated, and the pilot jet needed to be cleaned. Lancer had me adjust the idle jet screw out until the RPM was as high as it would go with that adjustment. And as Verslagen said "Don't Do That", meaning don't turn the throttle back so quickly.

Kenny G

Ill be blunt,
the engine won't survive low idle.
There are videos that have what it sounds like.
I SHOULD be more help here, I don't know the search function, I apologize.
A bit high beats low.
I adjusted mine as the thing warmed up. It's okay to tweak it , I can ride and adjust, no lean, no look, no tools.. just gloves,

main jet

Albert,

All Savages will all do that in stock format.  

Our carburetor is a vacuum actuated slide unit that always LAGS BEHIND any form of rapid throttle movement.   Remember, the stock bike is tuned for maximum EPA gas mileage and your little thingie is a natural extension of that sort of thing.

When you are riding the bike and do what you are doing, sometime you can get a backfire and you quickly learn not to do that sort of senseless rapid up and down movement with the throttle.   Smooth movement works best with a CV type carburetor.

Some of the mods we do can help somewhat with the issue, but do not make it go away totally.


====================


Dear Moderators, doesn't this really belong in Rubber Side Down where the fix it answer people tend to be?    He's getting a lot of guesses from the Cafe crowd that aren't going to take him to a conclusion.

Oldfeller, You are right, I previously owned 2 150cc bikes, and got used to them, I just have a year with this one and love it, but as you said, i can avoid the backfire moderating the throttle.

and Justin o guy2, I follow your advice and match the rev sound according  to various savage an S40 videos, great tip, the engine is responding better.

bwt When I bought the bike it came with the Jardine, Its cool at first but 112 decibels it is not cool after a 30min ride. I am looking for a stock pipe but have not found one.

Tnx all for your time.  

hope next pics are to show you my mods!

justin_o_guy2 wrote on 08/08/15 at 17:51:12:

Dyna muffler.
Lighter,sounds good, looks good, cheap,, easy enough to get.
MUCH easier to jet the carb.

^^^ what he said.

The Dyna not only LOOKs great, it SOUNDS very nice and is a fairly easy "slip on" install. Check this thread for the proper part number and then go on eBay and find a used one (Harley guys take off new/almost new Dyna mufflers and replace them with aftermarket exhaust...so there are always "gently used" units available).

Dyna muffler thread.

http://suzukisavage.com/cgi-bin/YaBB.pl?num=1298689417