A
ACMtnCat
Well-known member
Hmmm..... Yeah you guys on the XPs like to watch us ride the steep and deep from the trail all the time!
They usually cruise on by all the soft stuff!???
lol
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900 Mountain Cat opinions?
- Thread starter Skyhigh
- Start date
Hmmm..... Yeah you guys on the XPs like to watch us ride the steep and deep from the trail all the time!
They usually cruise on by all the soft stuff!???
lolIdacatman,"76, And Untouchable If you were to put an aftermarket pipe on what would it be for a single? CPI, Speedwerx, SLP etc...? Has any of you replaced the stock Y pipe with an aftermarket? What was the intent of the baffle inside the stocker, Throttle response, Less exhaust dilution in cylinders? I seem to recall not to mix up the carbed Y pipe with the EFI one on the "05 and later ones. Also the 03.5 had 8mm opening reeds in them, "04 and later ZR's and I don't know if the KK went to 11mm reed stops. Heard this makes a difference in all around performance, Cheap upgrade without the expense of aftermarket reeds. The other thing is the 9 post clutch, Works good but I think it is a "cracker" Would replace with later model 6 post? An 03.5 will run hard, Just keep varying the throttle through the mid range lean spot. Mine seems to be one of those one off sleds, I often wonder if it is really is 862cc! Maybe thats why they BB the XP to this size?
Mike
Mike
We use Black Magic singles on all our twins, they seem to work very well and be very little if any louder than stock. We don't change the y-pipe, just never got around to it I guess. We used SLP twins on the triple we built, they work well, but you can tell when the tuning gets off as you change altitude. (It doesn't matter much, there's enough power to pull through, but you can tell )
We use V-force 3 reeds in pretty much anything, so I wasn't aware of the difference in the stock ones.
We also use the 6 post clutch on all of them, it's more durable. We run the harmonic balance plate on the back of them, it damps the vibrations at low speeds.
You can mostly tune the mid-range lean spot out, you've just got to work at it. It does seem that ~860cc is a sweet spot, but the 975 really works well also.
)We use V-force 3 reeds in pretty much anything, so I wasn't aware of the difference in the stock ones.
We also use the 6 post clutch on all of them, it's more durable. We run the harmonic balance plate on the back of them, it damps the vibrations at low speeds.
You can mostly tune the mid-range lean spot out, you've just got to work at it. It does seem that ~860cc is a sweet spot, but the 975 really works well also.
Another thing I was thinking is on a 03 is run premium fuel only with the advanced ignition. I think 87 octane is boarder line especially if someone removed the tank cover and is exposing sunlight to the gas all day! There is a reason why there covered! If it were me I would paint the tank with a good plastic black paint and leave clear sight gauges on ea. side. I often wonder why some at the end of the day end up burning down on the way home, Maybe exposed fuel to sunlight? Thanks also for the exhaust reply, I have heard by others that the Y pipe was worth roughly 4 to 5 BHP?
Mike
Mike
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J
joshua335
Well-known member
I own a 03 900 and really enjoy it, but.... I think if your used to riding a XP you're going to be really dissapointed with the old cat chassis. I rode a rev a few times this yr, and going back to the cat it felt so outdated. Right now I'm leaning towards a newer sled too.
I'd recommend looking at a newer chassis if you have a chance, maybe a rev?
I'd recommend looking at a newer chassis if you have a chance, maybe a rev?
I picked up the 03 900 today. It already has the steering post mod, a pipe and can, and reverse! For the price differance between a rev I'll learn to love the ride. Groomed trails up here I come!
7
76FOMOCO
Well-known member
I'm in the same boat as Idacatman i run 48 mm cpc flat slides and jaws twin Ds choked down to 33mm with a 990 speedwerx 91 mm piston with a lot of porting. I still run the 9 tower but take and have them balanced with out weights and this helps a little on the bottom. as for pipe and Y i have never ventured out past the stock stuff, the reed seem to work better stock even with v3 i still went back to the stockers. for the money the v 3 are not worth it.
1 move to the forward mount post 2+ taller
2 higher seat (boss seats suck find some other vendor who cares about their customers)
3 snow eliminators
4 drop bracket's
5 vent the chit out of it
6 block off right side intake by the exhaust side
7 seal exhaust joints and out let in belly pan real good
8 check ground wire on motor to chassis for breakage and replace with #10 wire out of sjow cord (high compact stranding and very flexible and will not break due to vibration)
9 fill bar end full of foam to help keep heat in the hand warmers cuz they suck.
10 stock ski's are good if you put the doulleys from woodies on them.
11 replace the top gear with a new 20T and new chain.
12 grease all jack shaft and speedo bearing often.
good luck with the new ride and hold on tight and if the front end come up too much pull the limiter strap up one hole.
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man you guys have covered it quite well. I would add keep those clutches as clean as possible, check the o-rings on the primary weight bolts and be sure the set screws are lined up with the notch.
lets add some pics!
lets add some pics!
get rid of the oring groved bearings in the chaincase, and keep the speedo bearing greased up good.
NA setups I have had awesome luck with the SLP twins, also non setscrew clutches I always run polaris 10 series weights.
oh yeah turbo'd they run pretty good as well!!! 9lbs 230 hp, this motor responds very well to boost!!!!!!
NA setups I have had awesome luck with the SLP twins, also non setscrew clutches I always run polaris 10 series weights.
oh yeah turbo'd they run pretty good as well!!! 9lbs 230 hp, this motor responds very well to boost!!!!!!
K
kidrman
Well-known member
Matty, What do you like on the 10 series weights over cat weights?
I'm in the same boat as Idacatman i run 48 mm cpc flat slides and jaws twin Ds choked down to 33mm with a 990 speedwerx 91 mm piston with a lot of porting. I still run the 9 tower but take and have them balanced with out weights and this helps a little on the bottom. as for pipe and Y i have never ventured out past the stock stuff, the reed seem to work better stock even with v3 i still went back to the stockers. for the money the v 3 are not worth it.
1 move to the forward mount post 2+ taller
2 higher seat (boss seats suck find some other vendor who cares about their customers)
3 snow eliminators
4 drop bracket's
5 vent the chit out of it
6 block off right side intake by the exhaust side
7 seal exhaust joints and out let in belly pan real good
8 check ground wire on motor to chassis for breakage and replace with #10 wire out of sjow cord (high compact stranding and very flexible and will not break due to vibration)
9 fill bar end full of foam to help keep heat in the hand warmers cuz they suck.
10 stock ski's are good if you put the doulleys from woodies on them.
11 replace the top gear with a new 20T and new chain.
12 grease all jack shaft and speedo bearing often.
good luck with the new ride and hold on tight and if the front end come up too much pull the limiter strap up one hole.
I disagree a little cause i really felt the difference between the V3 and stock reeds i found it really give her that bottom snap! Real seeat of the pants, "wow thats cool!!" return on the buck for me.
always liked the curve on the 10 series for twins. Ran em all on the 8/900 motors MTX, cat, poo 10 series, cutlers, speedwerx (which thier mid range weight is a carbon copy of the 10 series but are $$$$ and their bushings and coating on them suck!) Could tell a big diffrence in side by side comparisons between same setup sleds.
what size and drop brackets should I use on my 04?
U
U turn
Banned
Looking for options as I need to replace weights on my 05 KK. Do you just switch out the weights, or do you have to change out the bolts to Polaris style also?
Thanks
U
untouchable
Active member
It depends on if youre looking to put a 16 wide under it or not. The SJ are really nice and come with all the equipment to clear a 16 wide track (WELL WORTH IT). I made my own set of brackets and then fit a set of 8" bogy wheels to clear the wider track. The SJ backets will help with the rear transfer and eliminate some of the trenching.
So are you catching my drift that the 16 wide track is a good idea?.....
