I have decided to finally mod the ZR 900 Sp. I have the 10.5 sheeves, a clutch kit, and a boondocker controller for the future mods. I have decided to get reeds, porting, head mods, and a single pipe. I am looking for opinions on which company to go with for a pipe and porting. I anm looking at D&D, Speedwerx, or BMP. If I go with bikeman they said they recommended their pipe mod over after market pipes. the claim 5-6h.p instead of 10 like the competition and say the competition don't make the h.p that they say they do. If you have experience dealing with them let me know your opinion. Just want honest opinions and experiences with the companies at hand. Dishing out a lot of money this year, at least it is to me, just want the best bang for the buck.

JW why not blackmagic. my uncle has a zr 900 with a lot of black magic stuff and never had a problem. it makes about 175hp

I can assure you that our 900 pipe will add 9-10 hp. Most of the people @ bikeman used to work here and we still sell the exact same pipe ???? It's still the same part so how would it of lost hp ??? Why can't eveyone just be honest about the crap ???

I haven't heard much about black magic since they almost went bankrupt. I know they are back but I don't know much about them. Didn't they get baught out by another company also?

This was the e mail I got from them.

"They claim 10hp but thats not what it acutally makes. Our pipe mod will run with either of those pipes all day long. You can go with any of those pipes and they will all be neck and neck, the advantage of our pipe mod is the price. Lemme know what you would like to do.

Thanks,

Robb Johnson
Bikeman Performance
715-247-6060
robb@bikemanperformance.com"

Just so you know the pipes they were comparing are the slp single and the D&D pipe not yours, because they do not sell your pipe.

I have a 2005 ZR900 bigbore sno pro and it is stock what are my best options for speed and trailing do more trailing and ditch banging than racing

On my 03 900, I had a speedwerx head, single and can, clutch kit, reeds Pro logic trail porting, 26/41 gears and it ripped. I only sold it cause I put a pick thru the radiator. The kit performed very well with no problems what so ever.

thanks for the info :beerchug:

Can you order any of these pipes in Canada, it sucks paying big bucks for shipping from the USA. Any parts stores in Ontario???

I have built a few of these engines.


One thing you need to keep in mind is that all of these 900's
have severe crank issues. I have seen many issues with these cranks
I just had mine apart and sent it out to be trued and welded.

Spec is .001 to .0015 total runout.
My 03 was out .007 on the mag side and .014 on the
pto. That's right 14 thousandths. The pork cop was pulling out of the crank pin and
rubbing on the inside of the crankcase. My engine has
1400 miles on it and was bone stock until now. My buddy has a 03 900 with 800 miles on it. His was .0055 on the pto and .008 on the mag
You are looking for trouble if you don't get it trued and welded.
you can take it to a dealer and get it fixed under warranty, but Cat will not weld them. The 900 crank is a bad design and will twist out of phase in a couple hundred
miles after it is trued, if it is not welded. If you true it and weld it you will not have any more problems with it.

I have a 2005 zr900 diamond drive, is it the same on these models as well it only has 200 miles on it

Severe crank issues?I've got 7500 miles on my 900,I've blown a few belts,motor runs great!???

The cranks are all the same from 2002 to 2006 ZR 800's and 900's

The only thing they changed was the cylinders on the early and later years, On a all 2002.5 and 2003 900 engines the decompresion hole went into the left side of the triple exhaust port, on 2004 and newer the decompresion hole went into the exhaust valve opening.

I would bet you a beer if you pulled the clutch off and checked the pto end with a dial indicator, it is out of spec. with 7500
miles on it, they will still run, just not very good.

One way to tell your crank is starting to go, is the sled starts to lose top end speed and runs at lower rpm's wide open than it used to and you did nothing to the sled. The reason they lose rpm is that since the crank is starting to twist out of phase and lose it "trueness", it robs the power out of it since it is fighting the out of balance.

Harmonics due terrible things to an engine. You take a engine that is 3 grams out, spin that 3 grams 8000 rpm, that 3 grams puts 20 pounds of force against the engine to slow it down.
As it gets worse it puts more force than it can handle and throws a rod out the front of the case.

The topic here is mods, I know from experience, you lean hard on these engines with mods, without a welded crank it will come back and bite you in the as$

better do some tunening ur goneto need it :smilielol: :smilielol: :beerchug: :beerchug: :div20:

its faster than my f7 and eats my cousins 900 fusion in the hole shot and 660. both are stock right now and I know my f7 was faster than most sleds stock even up to the 800 900s only ran it against the 900 fusion not sure how it will stand against other 900s stock.we,ll soon see I guess. snow is just around the corner :beerchug: :beerchug: :div20:

raced 1o1o big bore last winter and 2 900 big borezrs and bet them in 660 i must have a good one :div20: :beerchug: :banana:

0n reddemons sled johns :div20: :beerchug:

its going to be a fun winter. let the games begin. :div20:

got tousand xcr if i need it :smilielol: :smilielol: :banana: :beerchug: :div20:

Who do you recommend for trueing and welding and how much does it cost?

:beerchug: :div20:

There is many places that do it, the only bad thing about it is you have to take the entire engine apart, and most people have to pay some one to do it. So by the time you pay someone to do it, buy new seals and gaskets and pay to get the crank done and shipping both ways, you could have around
$500 or $600 in it total
It costs anywhere from $100 to 150 to true and weld the crank, plus shipping.

I have had Northern Crankshaft do a couple for me

www.northerncrankshaft.com

ask for John

Thanks for the info :div20: , no problem here taking the motor out pulling the jugs and cracking the case's.

I'd get ahold of rory haughn at black magic and see what he can do for you. Black Magic has very awesome results and customer support is second to none. This is my favorite company and i tried them all...

IMO,leave the stock pipe on it unless u want to go twins.from what i have seen most singles on the 900 do nothing for the most part. twins on the other hand......look the fock out!:)

Black Magic is in the same town as Northern crankshaft in Thief River Falls.
I don't know for sure, but I would bet a beer that they do all their work

D&D has a place in canada and the U.S. if that helps you.

I actually think the Slp and Speedwerx pipe both make about 9-10 more hp than stock. They both work very well. I have sold both and used both.
Our BMP pipe mod adds about 5-6 hp.
I'll have to have a talk with Robb and set him straight on the 900 pipe horsepower.
The pipe mod works great, bang for the buck, it's only $189.
The Slp and Spx pipes cost more and make more power. They are both ceramic coated silver too for nice look. The Slp comes with a new muffler, the Spx comes with a new Y pipe. I have a Slp in stock if anyone is looking. Oh, and both pipes work well on both ported and stock cylinders.




The boyeson rad valves add a true 4-5 hp on that model. Probably the best reeds I've scene work on a twin snowmobile motor. We offer trail porting, a head mod, 2.5 degree timing key, and have used the Slp single pipes mostly lately. Stock is around 150-152 hp. With the pipe, porting, head mod, timing key and boyeson rad valves you can expect power to jump up to 172-174 hp range. The 900 has alot of potential.
Our clutch kit using the supertip weight will really get the power to the ground for you too.

I'm running SLP's Performance Edition kit-single pipe and can, porting and head mod, V-Force reeds, and air box mod. Very similar to Bikemans' kit. Realistically rated at 172 hp and 117 ft.lbs. of torque peaking at 7800-8000 rpm. Still gets 12-14 mpg and has been stone reliable. With a 136" Ripsaw and 24/39 gearing it doesn't get beat to 100 very often and still beats most Mach Z's on topend(on snow, not ice with that gearing).Also, SLP has a cylinder exchange program where if you damage one they will exchange it with an identically ported cylinder for the price of the plating and shipping. You can pay a core and have it shipped next day air and be running the next day. Try that with another performance shop at the peak of the season! :div20:

I have the SLP pipe/canister, porting done by Simon's CPR, and Swain Tech coating on the pistons. Stock heads and reeds (although the stock reeds are modified for more flow - does it work? Who knows). D&D Power Breather with gutted airbox. It did close to 170HP on Bikeman's Dyno in the spring. I plan to run 480/490 main jets this year with a bunch of TPI valves. I also plan to try a M.C. CDI with 510N main jets to see how it does.

I like the SLP pipes, I would also trust their porting and head mod. I also believe Erich can provide similar results.

Thanks for all the honest replies. I do appreciate it.

thanks I,ll be in touch :beerchug:

do you recommend welding the crank ?

is it because of the rpm range

or

the increased power level

thanks

Both. I need to do this also and mine is all stock.

That's why you got it...cause you're gonna need it!

good one :beerchug: :div20: :arctic_cat_rules:

anybody running D&D twins? with airbox mods what you running for main jets. I read your guys posts and everyone is running a lot smaller jet than me. i'm running 560's with twins, powerbreather, and porting. now i am putting on boyesen rad valves and 2.5 key.

With the twins on my nine I used 470/480
All worked well until I leaned it to 460's.
I have a digitron and watched piston wash for any bad signs. :beerchug:

forgot to mention i have port work done. there is now way i could run 470 mains and keep it together....

Bikemann sleepr kit all the way,I used the slp single ,as he didnt have the stock pipe mod at the time.the slp ceramic coated single is lighter and really not that much louder than stock.I sold my zr 900 to a friend of mine ,last year we were in eagle river and pulled over by dnr fo random registration check.Needless to say we didnt get a ticket for loud exhaust,the slp single is not really any louder than stock.At idle or cruising! :div20: