I am glad to know that this works.....I am about 2 weeks away from trying it myself.  I had a O2 gauge sitting in my toolbox from a previous project - but no O2 sensor.  Yesterday I ordered the O2 bungs, and a single wire Oxygen sensor to adapt this to the Savage.

Do you remember what ID pipe size is needed to slide over the stock header pipe?

Halvor wrote on 08/27/12 at 07:33:31:


Doesn't rich mean smaller main?

Yes, it is Lean from half to full throttle. I will try a 155 main. At crucing it is slightly rich, therefore I concider putting back he original white spacer on the needle. I have 3 washers now= 1/2 spacer. I do not know how sensible it is for changes. I will be back with results.

Between lean and rich its an area with optimal mix. It is optimal when driving at highway speed. I guess the circuts meets each other.

Heres the equipment. App. 100 dollars for complete system.

http://www.biltema.no/ProductImages/32/large/32-214_l.jpg
http://www.biltema.no/ProductImages/52/large/52-950_l.jpg

New specs and test runs.

  Mix                                             Pilot      Main      Spacer
Carb settings      0,5-1,5 CCW      52,5      155      1/1 original spacer
Results o2%                        
Idle      10,50 %  (same as last run)                
Crusing      11,5 %   (+0,5%)                            
Half throttle      12-13%      (-3%)        
3/4 throttle      16% (-2%)                  
Full throttle      18% (-2%)                
Full throttle+ high rev      18,5%      (before: out of range)    

I found on internet that 12-13% is best for power. 14,7% is best for combustion (MPG, emission)

THe mix screw has less effect than expected. It was not possible to measure differrence in O2 on crusing speed from ,5 to 1,5. But it was for pops and bangs.

It is tempting to try with a smaller pilot, but I will try with a 160 main first. I am quite close in the pilot area with 11,5% (power) but not for MPG. Main is still way to lean on half to full throttle.

What suprises me is the good results with putting the original white spacer back again...... Tning for MPG it might be adjusted leaner... ? But I adjust for power of cource. And the rich side will make the engine run a bit cooler, wich is nice for a air cooled engine.

I'm two up on main jet one on low,Stock spacer. Its a little lean in mid range till motor warms up good or below 50 degrees .Drilled out stock muffler.

Thanks for interest. Heres some more info:
Idle 10,5
Cruising in 80kmh 11,5
Cruising in 100kmh 12
A little more than 100kmh 12,5

THis tells me that my pilot (52,5) is to big.

I have ordered a 50 pilot, a 170 main and a 180 main I guess the KN filter provides for to little vacume? It is very lean with 155 main. (18%). It changed 2% on an increment of 5. I guess it is not linear, but I want values around 12-13. THerefore the big jets.

KN filter, opened up dyna muffler. Home made bend for upsweep muffler mount  and opened header wich gives more volume (betwen inner and outer tube) for the exhaust. I do not know if it change anything with more volume.