Mystery Helix

[21GT]

At the end of last season I bought some clutch parts from Ron Ward at High-Tech mechanical. I never got to run the helix and then forgot about it. But there's no marks on it except for a Dalton part number 2405 on it. And he really wouldn't say what specs it was. Just trying to figure it out before trying it out this season. If anyone knows what angles it is please let me know.

 

[jonlafon1]

Put a angle finder on it.. Measure it in different spots on the ramp, this will tell you if its straight angle or a progressive>like the angle changes on the ramp from top to bottom of ramp.. Ramp on helix is where the rollers move up and down as the clutch shifts.

 

[21GT]

Put a angle finder on it.. Measure it in different spots on the ramp, this will tell you if its straight angle or a progressive>like the angle changes on the ramp from top to bottom of ramp.. Ramp on helix is where the rollers move up and down as the clutch shifts.

I will do that thank you.

 

[sideshowBob]

Decades ago when tuners first started offering clutch kits, I found it infuriating when the one and only clutch kit I ever bought came with unmarked helixs and mystery spring specs that the vendor would not release. Since that first experience I have always purchased individual components with known specs or custom parts made to my specs from vendors like Dalton.

 

[21GT]

Decades ago when tuners first started offering clutch kits, I found it infuriating when the one and only clutch kit I ever bought came with unmarked helixs and mystery spring specs that the vendor would not release. Since that first experience I have always purchased individual components with known specs or custom parts made to my specs from vendors like Dalton.

I agree I bought it along with many others last year when I was working on my clutching. I plan on trying some other combinations this year so I figured I'd run it by everyone on here. I'm going to put my angle finder on it and see what it looks like.

 

[max rolph]

roll it and tracing on paper is easier

 

[21GT]

roll it and tracing on paper is easier

Please explain the process

 

[jonlafon1]

Helix angles/STM/BDX,SSI/Yamaha

Wanted to show some measurements and in no way cutting STM just realize they are cutting/measuring helixes different. I believe Dalton’s measure same as Yamaha and the SSI one I have. Two straight 38 and the stock 35

ty4stroke.com

Another method. More info with pics.