You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

- Thread starter popcorn popper
- Start date

Shallower the angle = slower upshift / faster backshift

48 start is rather aggressive if you are running a mountain sled and may not backshift well which is why you drop. You can try a slightly less finish to take some load off you may have to drop pin weight. I would try a purple/purple secondary spring first, before getting a new helix.

higher the start number to quicker the upshift and vice versa.... 47 will upshift slower than the 48 or the 50.

If you can't measure it, you can't see it.

If you can't measure it, you can't manage it.

Take your helix and break it down into its component angles.

Example; a 50/40 has 11 angles. 50, 49, 48, 47, 46, 45, 44, 43, 42, 41, 40.

Take your gearing and known full shift overdrive speed and divide that speed by 11 angles.

Say your gearing is for 80mph full shift overdrive

80mph / 11 angles = estimated 7.27mph per helix angle.

You said "have to be on clicker #3~4.

Ok then IF in clicker #4, THEN what track speed is this happening at where you want quicker backshift?

Lets say 40mph the backshift is slow and you need to be in clicker #4 to have decent backshift, but you want clicker #3 to produce the same backshift strength in clicker #4.

Question; What angle is being used at 40mph track speed in clicker #4? [with this 50/40 helix]

Answer; 50(7.27) 49(14.54), 48(21.81), 47(29.08), 46(36.35), 45(43.62)

Ok then, at 45 degrees, at that position on the helix, you need to have at least 1 degree lower angle "At that track speed".

45 degrees at that track speed, the upshift is too fast, the backshift too slow = need clicker #4.

Then lower the helix angle at 43.62 track speed.

Question; what helix angle(s) will you use now to get 44 or 43 degrees at 43.62mph? You have to figure that out now.

If you can't measure it, you can't see it.

More information

If you can't measure it, you can't manage it.

Take your helix and break it down into its component angles.

Example; a 50/40 has 11 angles. 50, 49, 48, 47, 46, 45, 44, 43, 42, 41, 40.

Take your gearing and known full shift overdrive speed and divide that speed by 11 angles.

Say your gearing is for 80mph full shift overdrive

80mph / 11 angles = estimated 7.27mph per helix angle.

You said "have to be on clicker #3~4.

Ok then IF in clicker #4, THEN what track speed is this happening at where you want quicker backshift?

Lets say 40mph the backshift is slow and you need to be in clicker #4 to have decent backshift, but you want clicker #3 to produce the same backshift strength in clicker #4.

- What track speed are you having a problem at? What helix angle is being used at that track speed?

Question; What angle is being used at 40mph track speed in clicker #4? [with this 50/40 helix]

Answer; 50(7.27) 49(14.54), 48(21.81), 47(29.08), 46(36.35), 45(43.62)

Ok then, at 45 degrees, at that position on the helix, you need to have at least 1 degree lower angle "At that track speed".

45 degrees at that track speed, the upshift is too fast, the backshift too slow = need clicker #4.

Then lower the helix angle at 43.62 track speed.

Question; what helix angle(s) will you use now to get 44 or 43 degrees at 43.62mph? You have to figure that out now.

If you can't measure it, you can't see it.

More information

Last edited:

the difference between a politician (political) answer and me answering with a question is; the politician speaks their answer with a question to avoid answering an uncomfortable question. "When the going gets tough.....QUIT"

vs....

I answer w/a question showing error in playing musical chairs with helix angles. "When the going gets tough....work harder" Dont be a parts changer, rather, solve the problem.

What is the difference of changing helix angles where you dont know what angle is giving you a problem with - compared to shooting a dart at a dartboard with a blindfold on, after i spin you around 3~4 times?

Boils down to me saying

Dont ask people what helix angles you need to use, rather learn to "Ask the helix" what angles you need to use.

What angle are you using at X track speed yer having a problem at?

Now that you know the angle, then...

Apply the theory of what +sledwrecks+ says

...to come up with a new angle that reduces or eliminates the problem at-that-track-speed.

Apply the theory of what X-Treme3x says

...higher number vs lower number etc...

change the helix angle__at the track speed__ yer having the problem at".

vs....

I answer w/a question showing error in playing musical chairs with helix angles. "When the going gets tough....work harder" Dont be a parts changer, rather, solve the problem.

What is the difference of changing helix angles where you dont know what angle is giving you a problem with - compared to shooting a dart at a dartboard with a blindfold on, after i spin you around 3~4 times?

Boils down to me saying

Dont ask people what helix angles you need to use, rather learn to "Ask the helix" what angles you need to use.

What angle are you using at X track speed yer having a problem at?

Now that you know the angle, then...

Apply the theory of what +sledwrecks+ says

...to come up with a new angle that reduces or eliminates the problem at-that-track-speed.

Apply the theory of what X-Treme3x says

...higher number vs lower number etc...

change the helix angle

Last edited:

Take the helix out and just go with a really stiff spring.

- Thread starter
- #9

Wow thanks Joe. Very interesting info. Even though im slow getting back. Thankyou. Steve

Pm dragonweld28, he maybe able help you out.

- Joined
- Dec 8, 2011

- Messages
- 1,164

- Reaction score
- 3,671

- Location
- Edmonton

- Website
- www.altitudepowersports.ca