Sled has speedwerx single pipe, rad valves,d&d can,1.25 track,144 studs,shelf has been removed out of air box,cat yellow white primary 70.5 weights red white 2nd in 3rd hole 59-53 progressive helix.ethanol plug is unhooked, we bought sled last spring and have not drove it yet are these extras going to work togather or do we put it back to stock? we have all stock parts. Thanks

i would put it back to stock. Just unplugging the ethanol wire dosent seem like it would adjust the air fule mixture properly for all of those mods.

i would leave it the way it is . it is all ready set up

Read your plugs, I have a D&D can and reeds on mine (no pipe) shelf removed and it was way too rich with the wire unplugged, I plugged mine back in and it's still borderline rich.

I'd leave it alone and try it out but I suggest a change in the primary to 71.5g weights with a black/purp black magic or orange/white cat primary spring, it's a smooth strong combo, and will work nicely with the helix you have in....radar tested

MOD

thats what i would do, run it and try it out, see what it does, then if somthings not right fix it or make it stock again... just my 2 cents

I own a 02 CCZR800 EFI, and I've been talking with Speedwerx. Are these guys for real? Or are they blowing snow up my #*@! I live in Mn so snow these passed 2 years have been terrible for testing out my options. I also bought the red/white spring with the 59/53 helix plus the 60/52 helix. But I haven't tried it yet. Does taking out a shelf in the air box really help?

Catzrus, you'll love that secondary combo, but you'll have to bump up your primary to what I suggested above.

The 60/52 helix will be better for racing rather than trail, but you can run it on the trail easily.

Removing the shelf gets more air to the motor, that's the whole purpose....I didn't notice any seat of the pants performance gains from it.

I spent last winter testing different set ups so if you have any questions just ask, I'm not afraid to share my info. I hope to meet people from here on the ice just for comparason, if I can help you beat your buddies all the better....it's all about the fun!!!!

MOD

Thanks 69 MOD, I appreciate the help. I believe taking out 1 shelf is only if I put on an after-market pipe, right? What about gearing down? My previous sled was a 97' ZRT600, I shaved and balanced the heads, put in V-force reeds and geared down before the winter started so I'm not real sure how much gearing down helped but wholly @#%! did that thing rock!
I'm very eager to get the sleds home, hopefully with more snow than last year. I wiped out last Feb when we got that little blast of snow and I was out of commission for the rest of the year, so my thumb is getting s very itchy!
I have too run, check back with you guys later.

If you wanted to change gears go to 25-38, it's a higher ratio and helps reduce track spin but doesn't hurt your low end speed (actually it increases your E.T.) and you gain a little on the top. The motor has plenty of torque to pull right through the gears and you will feel the difference from that change.

There's only 1 shelf (it's actually a wedge shaped cone part #6 in the link) in there, I pulled mine and like I said I didn't notice any huge gains from it.

http://www.brownsleisureworld.com/Parts/SN...CERASSEMBLY.htm

MOD

It sounds to me as if you picked it up pretty well set-up. I'm currently running an 02 800 EFI with a set of heavy hitters set-up @ 73 grams with a yellow/white spring in the primary and 59/53 Red/white in the secondary. The sled runs very strong until the temp gets above 30deg.F then I lose about 200 rpm. I'm thinking that 69MOD's suggestion for 71.5 might just be the ticket. I also have the AC orange/white and BM Black/Purple springs in stock. I have not yet had a chance to try these. On the up side it appears that most of us are in the same ball park as far as set-ups go. Now all we need is snow to try them out...

kenzr and 69 mod, thanks for replies I have a set of 25-38 gears too but I weigh 270 lbs. with 1.25 track with 144 studs will it still pull the taller gears,also why would you lose 200 rpm over 30 degrees wouldn't the efi compensate for the temp increase, this is my first efi and I thought it was pretty much bulletproof, thanks Jay

Myroka

Even though the EFI compensates for fuel delivery, air & engine temp affects performance, warmer temps reduce performance, EFI or carb makes no difference....

Your sled will pull those gears easily even with your wieght (I'm close to the same weight) and when your thinner buddies hop on they'll come back with a big smile.

Kenzr, where are you from? do you hit any of the lake races in town? or out of town for that matter.... I live in Vadnais Heights (NE suburbs)

MOD

HEY MOD ... I HAVE A QUESTION FOR YOU . I HAVE A 2002 EFI WITH A DAKOTA PERFORMANCE CLUTCH KIT JUST A HELEX AND SPRING IAM HAPPY WITH THAT SET UP STOCK WEIGHTS.I ALSO HAVE A DD CAN ON IT AND THE SLED REALLY CAME ALIVE LAST YR BUT THE DD CAN IS A LITTLE NOISY NOT BAD THOUGH. I JUST ADDED A SPEEDWERXS PIPE AND ITS GOING TO TO LOUD NOW I THINK I STARTED IT AND IT WAS ON THE STAND AND IT I THING TO LOUD,SHOULD I GET THE SPEEDWERXS CAN TO OR PUT THE STOCK BACK ON. AND WHAT ELSE COULD I DO PERF WISE WITHOUT GOING TO NUTS THANKS

i would go with a speedwerx. i have a zr900 with a speedwerx can and pipe and it sounds good but not to loud. you could also put a breather on the sled, reeds, reed spacers, gears, speedwerxs head, gut the airbox. the list is endless

I DID TAKE THE SHELF OUT ON IT SPEED WERXS SAYS TO. I ALSO HEARD ABOUT THE GRAY WIRE SOME SAY TO PULL IT ONLY IF YOUR ON LONG LAKE RUNS AND TO LEAVE IT PLUGED WHEN TRAIL RIDING. THE D D SOUNDS CAN REAL GOOD (VERY MEAN SOUND TO IT) BUT WITH THAT PIPE MAN ITS JUST A LITTLE OVER THE EDGE. IM THINKING OF SPEEDWERXS OR BM CAN, IM LEANUNG TOWARD SPEED WERXS. I DONT THING IM GOING TO CHANGE THE GEARS NOW MAYBE RAD VALVES IM JUST A LITTLE CONCERNED WITH THE EFI I DONT WANT TO SCREW ANYTHING UP IT RAN GOOD WITHOUT THE PIPE LAST YEAR IM HOPING TO SEE A MARKED IMPROVEMENT WITH THIS NEW PIPE!

Hey 67Mod!

I have an 02 zr8 carb with an airbox mod, v-force reeds, no shelf and running 410s. I have 73 gram weights with stock purple primary spring and 58/54 in secondary with red/white spring. I am also using 25/38 gears. I put this in late last year and was having problems pulling more than 7100. I know this is too low but i think that the secondary is not bad but i think the problem is in the weights and spring in the primary. Would you suggest changing to the 71.5 gram weights with a differnet spring or is my finish angle too high to pull for long lake runs. This was supposed to be a good setup buy my dealer but ended up going slower. Any thoughts would be appreciated. :beerchug:

Jester

Should read 69MOD!

Sorry

Jester

Good evening guys,
Good to see some discussion happening here. 69 hit the nail on the head as far as my performance drop. The sled still runs crisp and clean , but due to the drop in air density from the rise in temperature the power drops off slightly.
Interesting that I too go 6'0 and 260.... Our running set ups should be fairly similar. I have not tried the gears yet. As most of us here in the upper midwest have experienced a distinct lack of snow the past couple of years, I've just been happy to get out riding (and not testing)
I do a little riding here around the cities, (Elk River) Some up in the Grantzberg Wisc. area and most of it up at my cabin near Itasca State park. A bit of a drive but worth every mile once you hit the trails and lakes
Well time to get back to lurking through this wonderful forum
I look forward to comparing notes as we get some seat time in
Later
Ken

Jester,

It sounds like your primary spring is too soft....here's a comparason:

We were talking earlier about the yellow/white AC spring and the orange/white AC springs, the spring weights are as follows. First # being angagement second being compressed rate.

y-w 124/296
o-w 145/295

now the only difference between these 2 springs is going to be engagement rpm (the o-w having a higher engagement) shift out will be the same.

your purple spring has a softer compressed rating (136/254) and will collapse faster, I think that this is why you're not holding the rpm's on top....the clutch is maxed out before you have pulled your whole helix. you can adjust the weights to compensate for this...or change primary springs.

The theory is 1 gram per weight (3gtotal) = 100 rpm gain aprox.
so 73g = 7100rpm - 1 gram (72) would be 7200rpm ect

the catch is that if you lighten your weights too much the problem will change to not being able to collapse your primary spring and you will over rev.

MOD

We'll have to see if we can get a few of us together this winter for a little lake running...

Thanks Mod!

I will pick your brain a little later when we get some snow if you don't mind!

Thanks again.

Jester

Hey Mod69!

Thanks again for the help.
I have another question. What engagement rpm did you have with the orange/white spring and the yellow/white spring. I am getting the 71.5 gram weights which I think are the ones that come stock on the zr9 which my buddy has and will give to me as he has gone larger in his sled. I am also gonna get the 59/53 helix as i like the top end with the 53 finish angle and i think it will pull harder with the 59 start angle. I don't want to raise the engagement too much as i often ride with my little ones on the tank and my wife also rides the sled and i ride the old cougar when we ride together with the kids. If the engagement is only a few hundred rpm or even higher if the takeoffs are smooth. You said before that this is a smooth pulling setup and I like the sounds of that. Thanks

Jester :beerchug:

Grrrrrrrr....mymmemory is failing me but I think it's going to be

y/w = 43-4400 rpm
o/w = 48-5100 rpm

Can't remember specifics right now

kenzr what was your engagement with your 73g on the y/w spring? 4100?

I saw it!!! Real snow in northern MN this past weekend.....Sure wish that I had taken my sled....I could have at least taken a couple of laps aropund the yard....
Any way back to reality. My engagement was right at 4000rpm with the yellow/white spring and 73 gram weights and very smooth. Good for plonking around with the wife and kids. I plan to go up to the orange/white or the BM Black/purple this winter. I let you know how it works... Of course I would imagine that 69 MOD may even have radar results of this set-up...... We'll have to try to hook up this winter and do some tuning on the lakes.
Later
Ken

MY 2002 ZR 800 EFI WOULD BOG ON HOLESHOTS AND HESITATE FROM A 60 MPH ROLL WITH V-FORCE REEDS . TOOK OUT HOLE NEW SLED , NO MORE BOG .JUST ORDERD D@D CLUTCH KIT ,WOULD LIKE PIPE ,BUT NOBODY SAYS HOW MUCH H.P. JUST SAY WORKS GOOD WITH EFI BUT GIVES (CARB MODELS ) 8-9 H.P. I KNOW ITS A TRIAL AND ERROR THING BUT NO THANKS I WANNA RIDE !!!!!!!!!!!!!!!!!!! D@D -BLACK MAGIC - SPEEDWERX ALL TELL YOU A DIFFERENT STORY !!!!!!!!!!! IVE RAN D@D STUFF BEFORE BEEN VERY HAPPY . SLED HAS BLACK TRAGIC CLUTCH KIT CALL FOR ASSISTANT THEY ARE A-HOLES!!!!!!!!!!1

good discussion- thought id bring it back. Hope no one minds. Ive been seeing alot of questions that this post could help with