2001 SRX Jetting Verification

B

billbies

New member
Joined
Dec 5, 2006
Messages
158
Age
42
Location
Grand Rapids,MI
Just trying to verify jetting specs
and to get the cobb webs out of my brain from summer
Can someone please fill in the blanks for me
I have fresh air kit with fully stock airbox and vforce reeds all else is stock elevation 600ft West MI area



Flywheel->#1_______, #2_________, #3__________, Clutch
Air screws turned out how far????
I have 42.5 pilots in it as well
I am just going thru my carbs and want to verify
I have 152.3 150 150 right now

any help is appreciated and I did use search and it gave me hints to this but no this is specs.

Thanks
 
billbies said:
why would 98/99 have bigger jet on mag side and 2000+ bigger jet PTO side
Click to expand...

Don't know for sure why the jetting change but I suspect it has a lot to do with the 2000+ SRX airboxes not having the vertical dividers in them like the 1998/99s had.

Bob
 
only 98-99 srx had the little extra dividers in the box under the std cone shelf.

there is no dividers in a 2000-02 srx or viper

the jetting was for the richer jet to be on the mag side of the engine because it recived the voltage first and ran hotter(closet to the power source) the 2000-02 went to having the larger jet to the pto side, because yamaha used a 3d ign and the pto now added the slight amount of heat to the engine,so you have a half jet richer there. Since the 3d ign only fires the plug for the cylinder that is need the other 2 dont get wasted energy firing all 3 coils at the same time.
 
how do you know what ignition you have check cdi or check stator
The reson I ask Is this sled is a mutt with parts from different years bc at one time this was my SOO I500 sled and the bottom end is still knife edged and welded with ported cases but with stock air box not gutted with the bender cold air kit in hood from racing and stock 2000 700 cylinders heads with stock exhaust and muffler with vforce reeds
So how do I tell which ignition i have in this thing? Bc its been soo long ago since I last changed any of that out I dont remember
 
well the quickest method would be to look at the coil pack, the 3d has a small extra subharness where as the old 98-99 has a single orange wire to it, besides the ground.

other thing you could do is look at the flywheel, the smaller flywheel is the 2000-02, the magnets on it also are differnt in that there is a extra small one in between the 3 long ones to tell TDC(4 magnets). the 98-99 one just has 3 large manets on outside for pick up coil.
 
Check your CDI and post a picture and the numbers off of it, should give some insight into the ignition system you have.
Also check the serial number on the cases as if its a 1998-1999 case someone would have had to have gone to a lot of trouble to upgrade it to 2000 or newer ignition.

Bob
 
mrviper700 said:
only 98-99 srx had the little extra dividers in the box under the std cone shelf.

there is no dividers in a 2000-02 srx or viper

the jetting was for the richer jet to be on the mag side of the engine because it recived the voltage first and ran hotter(closet to the power source) the 2000-02 went to having the larger jet to the pto side, because yamaha used a 3d ign and the pto now added the slight amount of heat to the engine,so you have a half jet richer there. Since the 3d ign only fires the plug for the cylinder that is need the other 2 dont get wasted energy firing all 3 coils at the same time.
Click to expand...

So do the other plugs still spark, just without a fuel charge? on the early ign system. How does this system work. Alittle confused by this.
 
The early SX 600 + 700 tripples[single headlight] and the 1998/1999 600 + 700 SRXs spark all 3 coils/plugs every time any piston approachs TDC in other words all 3 spark at the same time every 120 degrees of crank revolution. The Old Polaris tripples were the same.
The newer SXs[twin headlights] + the 2000 up SRXs and all Vipers only spark one coil/spark plug at a time every 120 degrees of crank shaft revolution matched to its specific cylinder.

Bob
 
You must log in or register to reply here.


Back
Top