Anyone touched their 800 secondary ?

[TLKDPROD]

I was wondering if someone tried a different Helix than stock (50/40) and a different stock spring (Green 180-303 lbs) on their 800HO Secondary

I made some researches and that is totally a trail setup. That's what you'll find on an MxZ and GTX 800HO ski-doo sleds... And again, AD Boivin made most of their developpment for trail and they don't have as much snow as here and they're defenitely not as high in Quebec... So I'm really questionning their choice here for mountain/deep snow/high elevation use.

So I was guessing that the '06 Summit 800HO 136" was kind of my best reference point for my 144", considering the square footage of the track touching the snow and the load it would put on the motor. I'm refering to the '06 models because Ski-doo had the 800R motor in '07 in Summits for the 1st year. That sled has a purple secondary spring (231-303lbs), I've been told by a ski-doo mtn tuner from Revy that this stiffer spring should allow for quicker backshift apparently, so less hesitation and better throttle response/more constant RPM in deep snow. Purple spring is the same on all '06 Summit. An absolute must apparently according to him. As for the Helix, that controls the "speed" or rate of shifting and straight 44 degree seem to be the Helix for pretty much all the 800HO summit in '06 except the 162. . I figure our narrower track is still easier to spin (so easier to upshift as well maybe...) than a 15" by 136" so it should allow for a little steeper Helix like straight 46 insead of a 44. Or maybe a combo degree helix like 46-42 or 48-44 I don't know...

And another thing to look for of course is final gearing... MTN have 28-56, Enduro 30-56 and '07 TopGun & '08 Trail 32-56. MTN do have the same ratio as these summit so one less thing to question...

Honestly, I don't know much about secondary clutching, as I only change the setup in my primary last year... I know though how a TRA primary work as I tried every setup change one at a time last year. Secondary, just took it off the shaft for the first time last weekend to replace my china bearings.

I am looking forward to put the spring first, see what it does and maybe try a Helix... what pisses me off with that is they're worth more than 120$ each and I don't know exactly if it'll be better or not.

Any comments or experiences you have and want to share would be appreciated for sure ! Thanks.

 

[J&L Snowhawk]

setup

2007 800-144
8-10k elev.
modified air box
compensator
primary clutch 160-290 spring 415 ramps 13.5grams pin weight
secondary straight 44 helix with black spring
removed front coil spring on skid
digitron tach
acerbis handguards

 

[TLKDPROD]

Question ?

Yours is a 136" track J&L with the 32-56 gearing right ?

Did you notice any noticeable changes in deep snow with this setup ?

Black spring is a 157-303lbs, did you notice higher acceleration and slower backshift with this softer spring ? The flatter Helix may have help getting things to spin faster though so... Clutching is a little tricky, damn !

Thanks for your infeed !

Thierry

 

[J&L Snowhawk]

setup

I don't remember exactly how it worked. I tried so many different things last season. We have a 144 paddle on it with stock low gears. The biggest thing for me was to be able to pull top rpm and hold it on all different snow. I have changed the stock belt to a wider one so belt deflection can be adjusted.

 

[yamacat]

clutches

I have an arctic that fits on your 800 and the helixes cost 15.00 us or multi angle for 30.00 the springs are around 15.00 I have 35 helixes you can nearly pick the #. on my 07 800 rev I use 48-44 works wounderful, A 52 48 is a lot faster up shift. but not enough holding power for deep snow.on a rev. The same set up will work on the hawk. I use a red white dot driven spring. On my rev I have 3000 miles on a belt.I have a yamaha viper with 9000 miles on the original belt believe it or not . My f7 has around 5000 on the belt. A cat clutches are the easiest and least expensive to tune and work on. hope this helps.

 

[TLKDPROD]

Thanks for the infeed Yamacat. That is an intersting starting point. I think I'll stick with my 800 secondary though. The helixes that I was kind of guesing they would work great in deep snow were actually 46-42 and 48-44 or maybe straight 46. As I said, I'll try the stiffer spring first, then maybe order a Helix after that...