Looking for some knowledgeable information on what options are out there to step my 03 ProX 800 up for next year before I get rid of it? I think I am maxed out on performance from this sled and need to find more power to be competative against the 2009 lineup. I need it to run on pump gas, must be trail dependable for 5,000 + miles but, it needs to put out 165+ hp. Please no circle jerk post!!!!

Big bore 900+ twins need new pistons about every 1500 miles or each season so I think this option is out. 165+ HP that can run 5000 miles is a tall order , honestly I think your best option maybe a xcr 800 triple motor ported OR a water craft 1200cc triple that will make 200 hp on pump fuel and stay running for a long time.

A buddy had SLP twins + head on his 03 Pro-X 800, its still running reliable as far as I know. I guess HP would be in the upper 150's in that config. For more, have Doug Flannery port it etc.

i just traded my pro x in and have a set of htg twins, v-force two reeds with an extra set of new pedals, all clutchuing/gearing and jetting necessary, torque arm, air box etc. all is mint and i ran it for 3000 trouble free miles and it makes a huge difference in torque. the springs and weights are new with 300 miles on them. call if interested daytime 613-938-0934 night 613-932-1867 ask for todd.

Stretch,

Just wondering, you are looking for more power, to keep up with the new sleds.

Are you wanting more power for the occasional drag race? Or looking for more power on the trail, so you can be further ahead while aggressive trail riding?

Don't need any more power on the trail. Trail power is sufficient. Lately I have been doing more grass drags and snow hillclimb drags with the sled and that's why I am looking for more power. Yes, to compete more consistently with the newer stuff. Stock F7's are not a problem for me. I just know that I am going to need a little more performance this year and next with the new skidoo xp's and polaris 800's.

xcr800 tripple

I don't want to go to a big heavy tripple. I want to stay with a twin. Looking to mod existing motor but, nothing ridiculous, need to keep it trail worthy.

Doubt your going to make a trail worty 165 hp 800 twin on pump gas..

How about putting a 900 cat twin in it, they have a real bottom end and bigger transfer ports.

Nitrous works good, butthe bottle runs out quick.

ANY INTEREST IN MY PIPES?

Twin pipes and some porting might get you close to 165 HP but pump gas might be a stretch unless you go with a low compression head.

http://www.amsnow.com/SNO/CS/forums/222587/ShowPost.aspx

Just wondering what you have done to the 800 so far? Big bearing? I would first address the reliability issue's with that engine (specially if you want big hp). Have you had the decompression ports welded shut on the cylinders? That was a 03' only issue. But you loose alot if they are leaking.

I am building one 800 now and putting the peices together for another one. Biggest increase you are going to get is from porting the cylinders and maybe the cases on that 800. Another thing you could do is run bigger carbs. Get a set of round slide 44's. You can find em' cheap. You will loose your throttle response, but if you are trying to get it set for grass drags and hill drags that would work great. Its kinda a toss up, one thing I have learned about the 800 is you have to choose what you want to ride, it's hard to have a best of all worlds sled.

Just to reply to someone else's reply above? Something about putting a higher compression head on and run pump gas? If you put a higher compression head on it and other mods then you most likely will have to run race gas.

Anyone know anything about HTG Racing 860 Stroker? HP, reliability?

go with crankshop twins and port cases and jugs. you wont be sorry. the crankshoptwins has wicked top end power.

I have a set of crankshop twins with stingers for sale if inerested pm me or call 320-333-7444 Jason

I run flannery porting, hsp heads cut 12.2:1 and crankshop twins. This is all you need to run away from your buddies. Completely different animal from stock. Buy those crankshop twins. I ran slp race twins and they didn't even compare to the crankshops. Stupid loud though, get a slp can and have the correct stinger diameter welded on and you are set. I have 3500 trouble free miles. I did a compression check at the end of this year and was 130 both cyl. Never cracked the motor after flannery reassembled it after working his magic. I run a balanced and machined clutch too. I had no problem beating my buddies 05 f7 d&d mod. Dan

Need info on HTG 860 stroker???

I dont now nothing about that kit but the price seemed pretty good. im sure it works fine

Is the 860 a stock bore, with a 76 mm stroke?

Yes it is.

In my opinion this is a easy decision.

700 is a 68mm stroke
800 is a 70mm stroke

Longer stroke makes more vibrations and harmonics

800's wreck cranks 10 times as much as 700's

Now making it a 76 mm stroke.

Cat 900's run 76 mm strokes, they have thier share of crank problems. They also run a wiegt on the inside of the primary clutch to dapen the harmonics. Cats bottom ends are also twice as beefy as a poo.

So we take a 800 poo botom end that breaks itself allready, stroke it, somthing that its not designed for, no counter balance on the primary.
Now the transfer ports on a 800 are small as is, so they will have to try to fill a extra 30cc per side.


Well I didn't list anything positive here, so you know my answer.

Anyone have anything positive to say on the 860?

Anyone know Jason? I bought these pipes off of Jason and have not recieved them and havent heard back from him.

my 04 xc8 has the slp performance edtion setup,there head and pipe, with flannery porting, made 162 hp, thats close, got 1100 truble free miles on last season. i ride with a bud that has a very good setup 03 zr9,lot of d&d suff, last ride at my cabin in waters we were running down old 27 along the rail tracks, run from about 20 mph,both times side by side till around 60, then i pulled him by 2 , he could not catch me ! its all i need for a trail sled, if you need more, put a tripple in it, you will never notice the extra 12-15 lbs, you will be having to much fun and will never have to worry about the new stuff.

The problem with the triple WC motors is the lack of fuel milage. Most are getting about 5MPG. Now ive heard much better pwer to fuel consumrtion numbers on the 800 triples from XCR's and what not.

if someone is willing to pay the $ there is a top shop here in Sweden who really can get some serious horsepower out of the ves 800
http://www.pfracing.se/ ,
my cousins pro xr 8 is dynoed at 180bhp, it really hauls ass, and have been really reliable the past seasons, much recomended..

But on what type of fuel?

that is on premium fuel, the 98 oktan fuel we use here is sufficient for a compression ratio of about 12:9- 13:2 on a ves 800 with crankshop twin pipes

Disregard this... I got the pipes.

On those lines... All I can say is wow. Put the Crankshops on, and already noticed a difference. Motor sounds happier. These pipes IMO are not even close to being trail rideable they are WAY too loud. I had a set of HTG's on there. Side by side the Cranks are shorter belly section and fatter (wider) there too. I am guessing they will make more power at a higher RPM because of this, but the header length is longer too so I could be wrong. I will post what the HP difference is between the two sets once I get them on the dyno.

Well i did run 13:5 with full advanced stator on my 800 with crankshoptwins on our 98octane and showed no signs of deto. we have great fuel here

The crankshops are crazy loud, I wear ear plugs when I ride. You can take a slp can and have the crankshop diameter stingers welded into the inlets of the can. Slp stingers are going to be larger I do believe, measure them up to make sure. You will love the crankshops, hands down better.