Been wrenching and riding my own sleds for two decades now, but new to Yamaha mountain sled ownership (actually it's my brother's sled, but I get to do all the wrenching) Did a lot of searches and scrolled back to posts from 2006 page by page, most info is on the MM700- but I assume chassis wise, things are equal.
Sled = 2000 MM600, bone stock currently, stock 141 track is junk.
Usage = 100% off trail sled, mostly U.P. with the occasional trip out west.
Based on what I've read so far, we have a reasonable plan, looking for input & direction now:
Chassis Items:
1) MPI transfer kit for rear skid.
2) Going with 144x2" Camo track. Will straight setback fit this? (any pics would be appreciated)
3) Stock ski shocks seem cheesy, any direct bolt-ins that are better?
4) 3" pivot riser and maybe additional 3" block- will stock cables allow for 6" of rise?
Engine Items:
Trying to be frugal and get best bang for the buck here (aren't we all!)
1) Planning on using reed spacers, stock cages, Boyesen power reed petals
2) Billet head set, stock pipes, & MBRP can < or >
2a) Used triple pipes and maybe thin head gaskets on stock head
Clutching/Jetting items:
If I could get a P-85 for free, is it worth changing out and what model P-85 would I need? I know Polaris clutching, never done a Yamaha.
- other gearing recommendations?
- Jetting stable with pipes and/or head mods?
Any other tips or tricks appreciated!
Sled = 2000 MM600, bone stock currently, stock 141 track is junk.
Usage = 100% off trail sled, mostly U.P. with the occasional trip out west.
Based on what I've read so far, we have a reasonable plan, looking for input & direction now:
Chassis Items:
1) MPI transfer kit for rear skid.
2) Going with 144x2" Camo track. Will straight setback fit this? (any pics would be appreciated)
3) Stock ski shocks seem cheesy, any direct bolt-ins that are better?
4) 3" pivot riser and maybe additional 3" block- will stock cables allow for 6" of rise?
Engine Items:
Trying to be frugal and get best bang for the buck here (aren't we all!)
1) Planning on using reed spacers, stock cages, Boyesen power reed petals
2) Billet head set, stock pipes, & MBRP can < or >
2a) Used triple pipes and maybe thin head gaskets on stock head
Clutching/Jetting items:
If I could get a P-85 for free, is it worth changing out and what model P-85 would I need? I know Polaris clutching, never done a Yamaha.
- other gearing recommendations?
- Jetting stable with pipes and/or head mods?
Any other tips or tricks appreciated!
Ideas
I have a 144 X 2" Camoplast for sale. It is in very good shape....can e-mail pics if interested. Don't bother with the reeds, the stock ones are just as good. Billet heads are fine for the bling factor but that stock head cools just fine.....save your $$. A silencer will shed some weight but won't doo much power wise....you may even loose some power. Tripple pipes and clutching will yield the best additional power for that engine but may be a little more difficult to find used for a 600 engine. Also....the stock clutch is excellent. Same innerworkings as a p-85. Just get the correct weights for what you are doing and dial it in.
Madmatt
I have a 144 X 2" Camoplast for sale. It is in very good shape....can e-mail pics if interested. Don't bother with the reeds, the stock ones are just as good. Billet heads are fine for the bling factor but that stock head cools just fine.....save your $$. A silencer will shed some weight but won't doo much power wise....you may even loose some power. Tripple pipes and clutching will yield the best additional power for that engine but may be a little more difficult to find used for a 600 engine. Also....the stock clutch is excellent. Same innerworkings as a p-85. Just get the correct weights for what you are doing and dial it in.
Madmatt
Madmatt- thanks, sent you a pm.
Going off my memory of what mods people like for the SX/MM I thought the trips had head cooling issues and poor chamber design? (or is that limited to the 700?) If the 600 is good to go, won't worry about aftermarket head setup.
Think I've got a set of aftermarket triples lined up. The P85 is more of a convenience as I know those clutches very well and have a ton of parts for them and don't really have the time or patience to learn the Yamaha clutching and tune someone else's sled for free.
Going off my memory of what mods people like for the SX/MM I thought the trips had head cooling issues and poor chamber design? (or is that limited to the 700?) If the 600 is good to go, won't worry about aftermarket head setup.
Think I've got a set of aftermarket triples lined up. The P85 is more of a convenience as I know those clutches very well and have a ton of parts for them and don't really have the time or patience to learn the Yamaha clutching and tune someone else's sled for free.
10-4
Sent you an e-mail. There are really not cooling issues with the red head motor unless heavily modded and you are not doing that. You may want to peel out one layer of the head gasket to get the compesssion up. Some reed spacers behing the stock reeds would benefit you too. On the clutch, what I was trying to say is that the Yamaha is the same in principal ie: the rollers and the weights work exactly the same. In other words, if you know the P-85 very well then you know the Yamah very well too. If you've got lots of springs and weights for the polaris clutch and you can get one for free then I suppose it might be worth while, otherwise just keep the yami clutch and dial it in with the right weight & spring combo.
Madmatt
Sent you an e-mail. There are really not cooling issues with the red head motor unless heavily modded and you are not doing that. You may want to peel out one layer of the head gasket to get the compesssion up. Some reed spacers behing the stock reeds would benefit you too. On the clutch, what I was trying to say is that the Yamaha is the same in principal ie: the rollers and the weights work exactly the same. In other words, if you know the P-85 very well then you know the Yamah very well too. If you've got lots of springs and weights for the polaris clutch and you can get one for free then I suppose it might be worth while, otherwise just keep the yami clutch and dial it in with the right weight & spring combo.
Madmatt
Or pick up the pin kit that lets you run the Polaris/Cat/Comet weights in the Yamaha clutch.
Pin kit
I was actually going to suggest he could use his polaris weights in the yamaha clutch but I didn't know if the pins were the same size or not so I didn't bother. Good call on that.
Madmatt
I was actually going to suggest he could use his polaris weights in the yamaha clutch but I didn't know if the pins were the same size or not so I didn't bother. Good call on that.
Madmatt
YooperMike- thanks for the lead, will do that for sure. What about springs- do you still run Yami springs?
Parts being shipped already:
* MPI transfer kit
* MPI rail extensions for 144 track
* 144x2 track
* Pivot adapter and riser block
Parts being shipped already:
* MPI transfer kit
* MPI rail extensions for 144 track
* 144x2 track
* Pivot adapter and riser block
YooperMike
New member
I honestly don't remember, I think it's a black spring in my primary...can't remember what's in the secondary.
bolin22
New member
weight clearance
The Polaris weights work well but need to have the tips ground off to clear the spider. Spring is going to depend on rider preferance. Org-pink-org will have a nice soft engagement and works well. If he wants a hotrod setup go with a stiffer spring
The Polaris weights work well but need to have the tips ground off to clear the spider. Spring is going to depend on rider preferance. Org-pink-org will have a nice soft engagement and works well. If he wants a hotrod setup go with a stiffer spring
Is that org-pnk-org an OEM Yamaha spring? Sounds like what we need, low engagement. Anyone use Goodwin Perf springs?
Full day wrenching on the MMax today. Got the stock 141 track pulled out (parking brake PITA) and installed the MPI rail extensions (very nice pieces) and the MPI transfer kit installed- straight forward and drops about 5 lbs. off the rear skid, straps are pretty darn stiff and a bit of a pain overall trying to get them installed after skid is in the chassis- per MPI instructions.
New Camo 144 is back in, pivot bar riser added, just need to pull the carbs and clean them good, install a lightweight can, install skid plate, and she's ready for snow.
New Camo 144 is back in, pivot bar riser added, just need to pull the carbs and clean them good, install a lightweight can, install skid plate, and she's ready for snow.