Twin pipes, or single? - Snowmobile Forum: Your #1 Snowmobile Forum

shichyea · 03-01-2005, 10:16 AM

i recently bought a 2000 rmk 600, with a 136 in. track... it has plenty of power for the trails an off-trail riding i do in northern MN and the UP, but i am looking to get some sort of aftermarket exhaust system for it, and i'm just curious was you guys think... i'm thinking about a set of SLP twin pipes with a lightweight silencer to go with them, but money is tight and i want my one purchase to be my last... so what do you think? or should i just go with the single pipe? different brand? etc..

600SE · 03-01-2005, 11:23 AM

-You should ask Yamahavector, Im sure he will give you a bunch of info on how you sould keep quiet and not wake people up at 2 in the morning, and blah blah blah....

After market pipes won't make a lot of difference alone (Power wise). You would need to make other mod's also. unless you don't care about power and just want to make the sled sound a little bit louder. You have to rejet the carbs when you change pipes, so it might not be worth it. makes the sled to lean. If you don't rejet the carbs you can burn a hole in the piston.

It's a pain to rejet the carbs. After you put the new pipes on you would have to run at diff speeds, then check the plugs to see what color they are. change jets a few sizes. run again check plugs, change jets again if needed, over and over......just a pain. Then it might not be quite right anyway and you could still burn it up.......

sesnopro · 03-01-2005, 12:19 PM

hotseat are great for polaris, keep your money in mn.

http://www.speedwerx.com/

sesnopro · 03-01-2005, 12:20 PM

Quote:

Originally posted by 600SE
-You should ask Yamahavector
After market pipes won't make a lot of difference alone (Power wise). You would need to make other mod's also. unless you don't care about power and just want to make the sled sound a little bit louder. You have to rejet the carbs when you change pipes, so it might not be worth it. makes the sled to lean. If you don't rejet the carbs you can burn a hole in the piston.

It's a pain to rejet the carbs. After you put the new pipes on you would have to run at diff speeds, then check the plugs to see what color they are. change jets a few sizes. run again check plugs, change jets again if needed, over and over......just a pain. Then it might not be quite right anyway and you could still burn it up.......

the company will tell you what jetting works the best.

cal67 · 03-02-2005, 12:04 AM

go with the SLP single pipe it saves 4 lbs wieght over the twins and the twins only give 2 horse more than the single @8100rpms
plus the tuning is easier on the single
light weight silencers\ go with a SS rumble pack it is lighter than the SLP and it sounds so sweet the slp can really does not change the sound \\ the rumble pack is smaller and leaves room for a spare belt so you can put your shovel on your clutch shield

shichyea · 03-02-2005, 11:14 AM

yeah i know all about re-jetting and and all that fun stuff, i had a 97 ultra with SLP triples in it, i really liked them but i was just curious what others had to say about the twins/singles and different brands... and as for noise, i agree, some are rediculous (mbrp silencers for instance), but after we got stopped by the dnr a couple weeks ago for speeding and two of our guys had after market exhaust that were noticably louder and the CO's didn't even make a mention to them about it, my fears of gettign a ticket were subsided a bit... thanks for the input cal and sesnopro, i know 600se was trying to disuade me from getting a set b/c he's worried about the noise, which is understandable but i've already made up my mind.... hey sesnopro, have you ever used the hotseat pipes? b/c liek you said, i would like to keep my money in MN, but not if i won't be happy with them....
i've also been told that singles are better for the low end, but if all i'm looking for is top end speed to go with the twins, is there any truth to this?

FRNTFLP · 03-02-2005, 11:37 AM

IMO - You are correct, singles are best for low to mid range, which is exactly what twin cylinder motors are designed to excel at. (Especially the Polaris 600/700/800). While multiple pipes are more for top end and high RPM, and will work, they end up stressing the motor in ways that it wasn't designed to handle. Not that it won't work, it's just a better fit to use multiple pipes on triples.

Time after time, I see the SLP's recommended at the #1 single for these motors. Not only to they offer a good product, but they have extensive support on how to jet and clutch your sled for all elevations and temps. Better than almost anyone else.

When I looked into this on the 700 I sold to Gerrett, everyone told me the Polaris factory pipe on the 600/700 motors is the best anyone has been able to make in terms of performance. While anyone can tinker and make any exhaust set up a tiny bit better than the others, the resulting performance change wasn't enough to justify the money. Weight is another issue. That's why I only changed the can on that 700.

Does your 6 have a boost bottle yet ? Best $35 you can spend on any aftermarket item for that sled. The 600/700 motors w/o exhaust valves all had a really rich bottom end. The boost bottle cleaned that out. If you really want to make it run to it's full potential as a stock config (motor, exhaust), add a set of V-Force reeds. They cleaned it up and made the motor really crisp across the whole power band. I did each change that 700 step by step so I could see what each one did. I would spend the money as above, then exhaust.

Have fun !

shichyea · 03-02-2005, 03:49 PM

ohhh ok, for some reason i was under the impression that you had put a pipe in that sled too, i must of been thinking about andy's maybe... how hard is it to install those v-force reeds? i've heard a lot of good things about them just not anything about installation... and yes a boost bottle will be on there by next december, the rest of this year will be pure stock. just looking for ideas on what to purchase this summer when i'm back to making money haha.

sesnopro · 03-15-2005, 04:20 PM

reeds are not hard to put in, go to hay days for some good deals.

shichyea · 03-15-2005, 04:35 PM

if i put a silencer and boost bottle on, would i need to change the jetting at all? or can i just put them in and ride away?

dano · 03-16-2005, 02:32 PM

maybe, but if you buy a pipe from slp or a silencer rather, they will be able to tell you that. just the boost bottle, no need to rejet. i threw a boost on my 700 as well and i noticed a diff, not huge but it was one step of many. i am putting on a silencer and v-force on my 800, and prob a boost bottle just cause i am sold on em. rejetting is easy and takes only a few mins though if ya had too

how was the slide replacment for ya?

d-dog

sesnopro · 03-16-2005, 03:25 PM

you dont need to rejet for a silencer or a boost bottle.

dano · 03-16-2005, 05:00 PM

like i said

shichyea · 03-17-2005, 01:10 PM

thanks for the info, by next year i'll have the boost bottle, and probably slp silencer in there i hope....

the slides were easier than sin, just pulled them out of the windows. but i essentially ruined the rails, theres enough to put a new set on but if i burn through these without noticing it won't take more than a few miles to destroy the rails completely... i did put another set of bogie wheels on in the front and rode all last weekend, and this week, and so far the slides don't even look like they have been touched. so hopefully those are my ticket.

dano · 03-17-2005, 02:33 PM

i think that extra wheels are the trick. I know i put them on my rmk and never went through a set of slides, granted i was always turning off trail or dragging my feet when i had to but, those wheels were (for 35 bucks) quite worth it.