SaskSummit
Active VIP Member
Is anyone Jetting down the XP's if so how much I have heard of people going down to 460s?
09 XP Jetting
- Thread starter SaskSummit
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maxwell
Active VIP Member
yah....if your at 5000-10000 start at 480 and check ur plugs.
but dont jump to 460 you need to work there slowly. the risk isnt worth the reward.
some people that run the rkt cylinder head can get way down to 450/460 no problem as its more efficient
but dont jump to 460 you need to work there slowly. the risk isnt worth the reward.
some people that run the rkt cylinder head can get way down to 450/460 no problem as its more efficient
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- #3
SaskSummit
Active VIP Member
The 480's are stock i thought a guy would be safe to go down a couple from there.
Backcountrypro
Active member
I just took the stock pistons out of my 09 163x to install a RK Tek 860, the wash on the pistons looked perfect with the stock jetting. I know after looking at the piston wash there is no way I would have felt comfortable jetting down any. This was with a Super Q can. I installed the 860 kit and installed 460 jets as recommended by Kelsey.
maxwell
Active VIP Member
LOL oh ya. used to the old girl.
i have heard of using 460s at elevation with no problems but i havent tried it myself.
i have heard of using 460s at elevation with no problems but i havent tried it myself.
OVERKILL 19
Active VIP Member
On my brothers 08 XPX ,dyna single,Ypipe,v-force,flowrites in the carb box,Motts 13:1 head, stock 480 jets. we pulled the plugs in revy up top the plugs looked great. We were going to drop a size but not going to now. I never tried it stock. Probably could.
Side note if your knock senser alarms in, check your plugs!
Side note if your knock senser alarms in, check your plugs!
Checking plugs could be an indication of only your last pull the only way to know is to look at piton wash. The 08 air intake is different so I would be cautious on the 08
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- #9
SaskSummit
Active VIP Member
Well not sure what to do. In the mountains when you mash the throttle I leave a nice big black streek in the snow. But I also ride a fair bit around home when there is snow so nit this year yet. But the elevation is about 2200' on average around here. Matbe I will call the local dealer and see what he says.
maxwell
Active VIP Member
how much oil are you using.
Summitizer
Active VIP Member
Check your DPM it may not be working correctly......remove the silver solinoid and spray with WB40.....had to do it on both my sleds....watch for the 2 O rings when you pull it out...
OVERKILL 19
Active VIP Member
One plug was lose causing the knock senser to ring in!
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- #13
SaskSummit
Active VIP Member
It doesn't use a whole bunch. Maybe 1.5L per tank if that?
maxwell
Active VIP Member
should use about 1L maybe that black is the extra oil
lightening1000
Active VIP Member
ran 460 with dynoport setup and was still a bit rich, i checked the wash also and the piston was really fat also. 460 runs perfect in stock sleds and you will feel the difference in crispness of the throttle.
giddyup
Active VIP Member
just was jetting with a buddy this weekend, before the next trip, 08 154 rkt 13-1 head full dyno port exhaust boysen reeds, 2200ft elevation -16C temp. 1.5 miles long pulls we have it jetted at 420 it could go lower but i would not, i dont know why we had to jet it down so much, i will double check the dpm but i checked it before it and was clean and working. it was a pig till we jetted it down
on all our sleds we jet to 460/470
giddyup
on all our sleds we jet to 460/470
giddyup
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- #17
SaskSummit
Active VIP Member
Well maybe I will give 470s a try.
08 800 x doo
Active member
Be care full i have a 08 800 xp i jetted down to a 460 at 2500 feet i didn't work better it worked good on the bottom end but she was running out of fuel on the top i put the 490 jets back in it & it works good again
Just a note i have D.J. ramps heilx solid pins crank shop pipe y pipe mbrp can 2 x 2'' flow rite in the back of the air box the sled works very good in the mountion but i also leve a little back behind when i take off it doesn't do this had home at 2300 feet i am not going to worry about it
Here is a fact you cann't have a sled that will good in the mountions & in the low lands
I am going to leve it the way it is & build a low land sled this summer it will be a 04 to a 0 MXZ 800 body with a 809 triple in it yes triple 200 + HP 144 x 2'' track yes i wont 120 mile a hour trail sled lets face it the summits were not made to ditch bang that is y they are being al bent up just my 2 cents worth
Just a note i have D.J. ramps heilx solid pins crank shop pipe y pipe mbrp can 2 x 2'' flow rite in the back of the air box the sled works very good in the mountion but i also leve a little back behind when i take off it doesn't do this had home at 2300 feet i am not going to worry about it
Here is a fact you cann't have a sled that will good in the mountions & in the low lands
I am going to leve it the way it is & build a low land sled this summer it will be a 04 to a 0 MXZ 800 body with a 809 triple in it yes triple 200 + HP 144 x 2'' track yes i wont 120 mile a hour trail sled lets face it the summits were not made to ditch bang that is y they are being al bent up just my 2 cents worth
giddyup
Active VIP Member
i agree, you cant have the best of both world, the shockwave help but the same setup will not work the best in both applications,
giddyup
giddyup
kevin p
Member
hey there blain. i dropped down to a 450 and when i pulled my engine apart the pistons were very black yet. i was gonna try a 430 even. pluss they are way under oiled. im gonna start adding 400ml per tank with the 860.
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