Thread: Jetting a non PV 1200
05-14-2009, 01:44 PM #1
Jetting a non PV 1200
hey guys, im sure this has been covered before but i couldnt find what i was looking for. Anyways in a newbie in the jet ski world but been involved in quad and dirt bikes my whole life and i must say these watercraft carbs throw me for a loop. Heres what ive got. I have a 98 gp1200 ported cases and cylinders, riva head 41cc with triple pickups, VF3 reeds, reed stuffers, a Red spacer?? and stock Raider exhaust. I jetting that was in the ski is 137.5, 100, 35 and a 2.5 seat gold spring?? Everything ive worked on has had slides with there needles so im lost.
Last edited by SvrdRam; 05-15-2009 at 07:12 PM.
05-14-2009, 02:01 PM #2
05-14-2009, 02:17 PM #3
05-14-2009, 02:17 PM #4
well the jetting was for when the previous owner had his triples on it. I bought it with a bad top end and no exhaust. Just want to see if i should make any changes with it before i throw the carbs back on.
so the 35 should be the starting jet like on sleds?
05-14-2009, 02:23 PM #5
98 gp1200 normaly used different(lower) specs but with your porting and such it was raised across the board.. they sound close, but let the 1200 members chime in on this!!needle and spring sound a bit large thou for a single pipe motor..(staying single pipe?)
05-14-2009, 02:36 PM #6
yea, tried to find some triples for it but no luck...picked up a raider exhaust for it since i heard that there stinger had a better design...
05-14-2009, 06:03 PM #7
Im not sure how close we are but I'm working on jetting an running
115 gram springs
05-14-2009, 07:16 PM #8
50MM BRM carbs
05-14-2009, 08:10 PM #9
Wow Jdog...that jetting is working good for you? I'm running 46's and that is one big ole main jet!!
My old raider I had ran like 95 pilots with 150-155 mains...I thought those were monsters!
05-14-2009, 11:35 PM #10
I am running 100pilot 135 main 1.5 N&S and Gold spring on my stock 65U shaved head only.
I plan on running 110 pilot 135 main and 1.5 Gold spring on my mildly ported GP1200 will see how this goes probably fat in the lows.
The bigger needle and seats will cause dribling problems in these motors, unless you need them to transition lower I would stay away from anything bigger than the 1.5's they will flow all the fuel you can ever possibly want from the carbs.
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