Ramp change is a must other wise a spring straight from the heavens won't work.
Infamous EPI yellow spring
- Thread starter newtrout
- Start date
08 stock 42 helix for now. Once I get the primary working I will probally go to a 45-40 or 44-40 ish just to give a little more upshift off the bottom.
Ditto
Throttle Junkie, Sorry, I did not post the rest of my clutch set up. Primary spring is stock, ramps are 433's, 22 grams pin weight. Stock secondary
G
ghost rider
Well-known member
to hot
just got back off the hill, had four machines to test with, 2 with Epi yellow. Results were clutches to hot and loss of 5 mph track speed. 2 springs for sale.
just got back off the hill, had four machines to test with, 2 with Epi yellow. Results were clutches to hot and loss of 5 mph track speed. 2 springs for sale.
G
ghost rider
Well-known member
07, 08, and 09. Tried different helixes, primary weight etc. No matter what way you try to flip it more heat. Gave it a shot but highly dissapointed!
R
RKT
Well-known member
G
ghost rider
Well-known member
always willing to try something new, only $30. By the way have 2 buddies running your 860 kits that got spanked by stock 800's, you may want to post your clutch and jetting specks for 7000- 10,000 ft. Since you you know tuning
I was leaning more towards less secondary spring, but the stocker is more than adequate unless you load up the primary with TOO MUCH weight on too low of clicker #.....then you will need more secondary spring to compensate.
So, are there any more reports with the yellow spring? Are you guys still using them?
holy pin weight batman...
I am still running my EPI yellow and plan on keeping it. THe belt was slipping in the secondary with the stock spring on my sled.
Edit: Guess I should add I have 14.5 grams of total pinweight (including c-pin) but I do run low clickers. run in 2 to 3. Do not go to 4 unless I absoluty have too. My theory (not saying I am right
) with the ramp profile is if you run a higher clicker all you are doing is getting RPM's by not shifting, I want the primary to shift hard and maintain the lighter pin weights to control RPM's. LIke now on the trail down low (3000 feet) my sled overrevs on teh trail...82 - 8300 but it still is shifting and pulling not just reving...Once I get up to riding alltitude it is consistent at 8100 - 8200. Or it was until my rollers went defunct in 800milesAlso my belt heat is reduced by more than double from last year.
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Still runnin mine Now even with a $58 dollar Gates Belt
Now even with a $58 dollar Gates BeltStill running mine. Clutches are hot but don't fade and 377 is taking it. Good enough.
yellow spring
My opinion
My recomendations are for hillclimbing only
You don't want a 19 tooth top gear. Take a heat gun with You and shoot the top sprocket after a hard pull You'll find it runs 100' F hotter than a 21-49.
put 413 ramps and the stock spring back in the primary with 18 gram pins.
Gear your sled down with 7 tooth drivers.
Throw that split helix in the bush-the stock straight 42 is light years better but what you want for a 163 is a straight 40
Keep the original purple spring in secondary
My opinion
My recomendations are for hillclimbing only
You don't want a 19 tooth top gear. Take a heat gun with You and shoot the top sprocket after a hard pull You'll find it runs 100' F hotter than a 21-49.
put 413 ramps and the stock spring back in the primary with 18 gram pins.
Gear your sled down with 7 tooth drivers.
Throw that split helix in the bush-the stock straight 42 is light years better but what you want for a 163 is a straight 40
Keep the original purple spring in secondary
Any further testing on the yellow spring?
I put one on my 07 800R 151, everything is stock...gearing, weights etc. and I believe it came with a straight 44 helix.
Unfortunately, things were socked in...but DEEP!!! (waist to chest deep in Revy) so there wasn't any real testing on long steady pulls...mostly tree riding. Anyway, from what I did find, secondary temps were down, but I was having trouble holding rpms over 8K on clicker 4...and I was always on clicker 3 with the stock spring. Anyone else finding this??? I thought rpms should increase with a stiffer secondary spring?
Any feedback would be great. I just want to hold 8100-8200 on a long steep climb in the deep. I was having the bouncing rpm problems...and thats how this whole thing started. My dealer in town (Calgary) is telling me to go back to the stock spring and drop pin weight to 12grams???
I put one on my 07 800R 151, everything is stock...gearing, weights etc. and I believe it came with a straight 44 helix.
Unfortunately, things were socked in...but DEEP!!! (waist to chest deep in Revy) so there wasn't any real testing on long steady pulls...mostly tree riding.
Anyway, from what I did find, secondary temps were down, but I was having trouble holding rpms over 8K on clicker 4...and I was always on clicker 3 with the stock spring. Anyone else finding this??? I thought rpms should increase with a stiffer secondary spring?Any feedback would be great. I just want to hold 8100-8200 on a long steep climb in the deep. I was having the bouncing rpm problems...and thats how this whole thing started. My dealer in town (Calgary) is telling me to go back to the stock spring and drop pin weight to 12grams???
Words of advice.............................
FOCUS ON THE PRIMARY
FOCUS ON THE PRIMARY
Ummm OK, so do you think going back to the stock secondary spring and droping pin weight from 24 grams (stock) to 12 grams would be the way to go?
If your primary pins are 24g, they are not stock. All else being equal, if you added the yellow spring only, your RPMs should have gone up, not down. The 07's are bad for the spring tower cap bushing going bad....have that checked.
