...is makin' me angry!  Alrighty.  I ride winters, this one no exception.  I got this bike, and had a pop to it (Jardine exhaust).  After some digging, I found larger jets, and a DynoJet needle kit in her.  I have the needle at one step below the top notch (Making the needle go almost as low as possible)  Still pops now and then.  When I adjust the Idle mix screw (the plug was gone), it doesn't seem to affect much....I can turn it all the way in and the bike seems to run okay.  Vacuum leak somewhere? Any suggestions?

Liam

First, what year is your Savage?  If it's one of the early models, they have larger jets already as well as an adjustable needle with (I believe) 5 slots/positions.  The DJ needle has more slots/positions (7, I think). If you already have at least a 152.5 main jet, you'll probably be okay.  Whether you use a 152.5, a 155 or 157.5 is very individualized.  I'm just trying to be sure as to whether you have early model stock jets and needle or if they've truly been changed out.

Next, I'd suggest you try following the procedures in the Lancer's Straight & Simple Carb Tuning thread in the Tech Ref forum.  If you still think your pilot adjustment is making no difference, look into upsizing the pilot jet to a 55 if it isn't already.  If it's already a 55, leave it.

Last, it's always possible you have an exhaust leak.  I spent a lot of time retuning my carb until I finally replaced both exhaust gaskets.  The gaskets fixed the backfiring.

You might try looking for exhaust leaks. I'm told that causes backfires.

Also, I've found that adjusting the idle speed up a bit also helps with the backfires when you roll off the throttle.

I still get a backfire on shutdown and I'm running a 55 idle jet.  I think this bike will always backfire on shutdown.

almost forgot the 2 tubes on the sides of the carb, are they clear and hooked up to the air box(is there and air box)?some mod's they just hang around and can get filled with uchky stuff, this slows down air flow/mix. if no air box, is the hose from the top of the engine filtered ?

Alrighty...thanks for all the suggestions.  I'm gonna turn up the idle some (I always leave my bikes at just barely running...that's just the way I was taught) and order me up a new head-to-headpipe gasket and see what that does for me....

-L.

sparkett wrote on 12/31/69 at 16:00:12:


Only if you want it to be

justin_o_guy wrote on 12/31/69 at 16:00:01:


I recommend one of these...

I used this one
http://www.phatperformanceparts.com/merchant2/merchant.mvc?Screen=PROD&Produc...
with a ~$30 case from ebay to end up with this for around $100-115