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Message started by Brendan on 07/26/06 at 20:52:06

Title: Savage Timing
Post by Brendan on 07/26/06 at 20:52:06

Have any of you guys ever played with your ignition timing to try and sort out the backfiring issues? As soon as my dad heard my bike pop upon shutting it off he said I need to adjust my timing. What is the stock timing for these things? Perhaps retarding it a touch would alleviate some of the back-firing issues.

Brendan

Title: Re: Savage Timing
Post by Reelthing on 07/26/06 at 21:32:01

Not adjustable

Title: Re: Savage Timing
Post by stinger on 07/26/06 at 23:03:32

its not timing, its running lean. read the threads in here about drilling out the plug and adjusting the richness and rejetting of the carberator

Title: Re: Savage Timing
Post by Brendan on 07/27/06 at 02:04:40

Yeah I have read the lean threads, didnt think mine was applicable to this stuff as its an 86 Australian bike. Im going to tune it up this weekend.

So you cant adjust the timing at all? Thats crazy. I just assumed it would be like my dirtbike where you can twist a stator plate back and forth.

Title: Re: Savage Timing
Post by Kropatchek on 07/27/06 at 02:58:08

Non adjustable timing. There's a Hall sensor inside the generator housing giving a pulse every revolution to the igniter unit ( CDI).

CDI adjust the timing as follows:
5* +/- 2* BTDC at 2000 RPM
30* +/- 2* BTDC at 4000 RPM

* = degrees, have no proper digit on my keyboard.

This from the Suzuki WSM

Greetz
Kropatchek 8)

Title: Re: Savage Timing
Post by klx650sm2002 on 07/27/06 at 03:52:02

If you get to the ignition sensor you may be able to file the mounting holes giving you a degree or two. Just my 2 cents.

Clive W :D

Title: Re: Savage Timing
Post by Savage_Rob on 07/27/06 at 05:54:08

Even with an 86, it still has the lean condition unless someone has corrected it. Yes, there are differences in the needle and jetting in the early bikes, as there are differences between U.S. and European versions. You should have an adjustable needle so that you don't need to file the white spacer and your initial jetting is probably okay. You might need to rejet if you open up your airflow any more but the 155 main may be enough then too. Adjusting the pilot circuit idle mixture and changing the needle position will likely fix most of your backfiring problems. If not, start looking for intake or exhaust leaks.

Title: Re: Savage Timing
Post by Brendan on 07/27/06 at 19:27:51

Thanks for info re ignition guys.

My bike actually doesnt backfire much (only one poof upon shutdown), but its not running real well at all. I am convinced its not carby, hence why I am looking at the electrical side of things. I already have replaced the igniton coil and plug, now I guess Im going to have to think about the stator coils and CDI ($$$$). I have played the game before where I have stuffed around with carbies for weeks only to find it was a dud stator coil that was giving me grief.

Tomorrow Im going to set up the carb as per the reccomendations here, take it for a burn and see what its doing. If its still running poorly ill try a new CDI

Title: Re: Savage Timing
Post by Savage_Rob on 07/27/06 at 19:51:17

If all you have is the shutoff chuff, I wouldn't mess with it unless you are modding for more power. The early bikes are subject to the backlash issue though. You may want to search for "stop the backlash".

Title: Re: Savage Timing
Post by geo on 07/27/06 at 20:20:26

Get a SuperTrapp slip on. You will be impressed.
The SuperTrapp eliminates the stock explosions. But it adds some between shift ka-pops. These are much more acceptable, and sound more agressive.

The SuperTrapp mod is the most impressive change you can make to this bike.

Title: Re: Savage Timing
Post by lancer on 07/28/06 at 12:18:53

The Supertrapp is one of several SIGNIFICANT mod's, don't forget a performance carb and cam will also yield similar results.

Title: Re: Savage Timing
Post by Savage_Rob on 07/28/06 at 13:51:30

And there are a number of aftermarket mufflers besides the Supertrapp. I'd also point out that a number of ride quality mods and safety mods would be what I would consider significant. A Xenon bulb is a quick and inexpensive way to be safer at night. Upgraded shocks and a fork brace really improve ride quality. I've also grown fond of my Amal carb. I like its simplicity and responsiveness.

Title: Re: Savage Timing
Post by theikeman on 07/28/06 at 22:20:03

Found this on the Shadow 750 and VLX board, those bikes cannot be timed either. Maybe this type of mod could be done on a Savage?
http://www.sa750.com/timingmod/

Title: Re: Savage Timing
Post by lancer on 07/29/06 at 06:53:00

Can we do this on the Savage?

Title: Re: Savage Timing
Post by thumperclone on 07/29/06 at 06:59:26

that long article post here by the european feller (doesnt like savage)metions slotting the pick up also..
im on a mini bike forum (ct 70 clone) these guys are mainly into 110 cc and smaller bikes they have post about slotting the pick up also...one instersting read for you tuners is mototuneusa.com this guy is a multi cyl racer some intersting concepts one being is jb weld in the ports to reshape them =more velocity.. ;)

Title: Re: Savage Timing
Post by babbalou on 07/29/06 at 07:49:58

Interesting topic & possibly more untapped potential in our thumpers to be discovered. I know that in the days of mechanical ignition advance you could by a piece of metal that would alter the factory ignition curve for better performance &/or better mileage in cars. My gutless 86' Honda Accord used to stall on uphill stoplights all the time until I twisted the distributor a few degrees (left/right? don't remember) then it pulled like a tractor but lost power on top. Same with my wife's Toyota Paseo. Some bikes, like the C50 don't have a "fixed" ignition curve. It changes constantly for optimum advance for the condition, based on input from sensors wired to the black box.