TBird
Expert
- Joined
- Dec 25, 2004
- Messages
- 379
- Reaction score
- 15
- Points
- 893
- Location
- North of Sweden
- Country
- Sweden
- Snowmobile
- Yamaha Viper and Yamaha Nypex
Anyone tried their Tapp clutch interested to share first impressions and settings?
I have searched for info but couldn't find much.
Background: Everyone with an Yamaha turbo realize how much weight in each arm is needed to hold rpm's down, to me it started to getting scary when i got over 90g / arm, and i read about weights been thrown out to the atmosphere thanks to the enormous force centrifugal energy exposed them to when engine is revving more then 11000rpm, clutch more then 9000rpm.
With a 4-arm clutch each arm can be lighter, there are several models to chose from but in the Tapp i found a clutch quite diffrent from everyone else, and fit my demands perfect.
With the Tapp you can change ramp angle with quick clickers, much like Ski-Doo TRA primary, done really quickly, perfect when changing boost level out in the field
.
To tune it you can also change ramps, roller size, weight and spring.
I truly believe everyone can benefit from sharing our settings.
This is my tuning from my absolute first day off sledding with the new clutch, we got snow extremely late so i only been able to ride this weekend, i combined it with some tuning of course.
Sled: Yamaha Apex MTX MCX, 162" Extreme track, 20/40 gearing, starting season @ low boost = 0,8bar (12lbs) = ~260hp.
Secondary: Shockwave helix @ 46° straight, EPI purple @ 0-1.
Tapp: Clicker #5 on all 4 positions, tapp 4 5/8 spring, long bolts and 4 washers / arm, +2mm rollers.
Result:
Smooth engagement @ 3500rpm, good beltgrip with no smell from belt despite low speed a couple of minutes in rough terrain in really loose snow or from the short bursts with w/o throttle.
0-100mph in loose snow, no rev limiter but a small jump to ~10700rpm initially, after that it holds 10500 all the way, further ahead in my tuning i will log the runs to get exact rpm, boost, a.s.o.
Pulls really hard to ~80-90mph but feels as it falls off a bit in the end, don't know yet if it's the really light and loose powder snow conditions (we got ~2 feet the last days), low boost setting or clutching, have to test and tune more obviously.
Clutches cool and nice, no problem to hold my hand on them, didn't bring my temperature gauge because i didn't expect to get it so close first day.
There's more left on the table, but considering it's from initial tuning i am really happy, response is snappy and still keeping it off revlimiter, rpm is not perfect but i feel i have a baseline to work with.
Please share settings and conditions and we will get the most out of our sleds.
Some links:
http://www.powderlites.com/tappclutch.php
http://www.c3powersports.com/content/ta ... ies-clutch
http://www.snoriderswest.com/gearboxx/a ... app_clutch
I have searched for info but couldn't find much.
Background: Everyone with an Yamaha turbo realize how much weight in each arm is needed to hold rpm's down, to me it started to getting scary when i got over 90g / arm, and i read about weights been thrown out to the atmosphere thanks to the enormous force centrifugal energy exposed them to when engine is revving more then 11000rpm, clutch more then 9000rpm.
With a 4-arm clutch each arm can be lighter, there are several models to chose from but in the Tapp i found a clutch quite diffrent from everyone else, and fit my demands perfect.
With the Tapp you can change ramp angle with quick clickers, much like Ski-Doo TRA primary, done really quickly, perfect when changing boost level out in the field
.To tune it you can also change ramps, roller size, weight and spring.
I truly believe everyone can benefit from sharing our settings.
This is my tuning from my absolute first day off sledding with the new clutch, we got snow extremely late so i only been able to ride this weekend, i combined it with some tuning of course
.Sled: Yamaha Apex MTX MCX, 162" Extreme track, 20/40 gearing, starting season @ low boost = 0,8bar (12lbs) = ~260hp.
Secondary: Shockwave helix @ 46° straight, EPI purple @ 0-1.
Tapp: Clicker #5 on all 4 positions, tapp 4 5/8 spring, long bolts and 4 washers / arm, +2mm rollers.
Result:
Smooth engagement @ 3500rpm, good beltgrip with no smell from belt despite low speed a couple of minutes in rough terrain in really loose snow or from the short bursts with w/o throttle.
0-100mph in loose snow, no rev limiter but a small jump to ~10700rpm initially, after that it holds 10500 all the way, further ahead in my tuning i will log the runs to get exact rpm, boost, a.s.o.
Pulls really hard to ~80-90mph but feels as it falls off a bit in the end, don't know yet if it's the really light and loose powder snow conditions (we got ~2 feet the last days), low boost setting or clutching, have to test and tune more obviously.
Clutches cool and nice, no problem to hold my hand on them, didn't bring my temperature gauge because i didn't expect to get it so close first day.
There's more left on the table, but considering it's from initial tuning i am really happy, response is snappy and still keeping it off revlimiter, rpm is not perfect but i feel i have a baseline to work with.
Please share settings and conditions and we will get the most out of our sleds.
Some links:
http://www.powderlites.com/tappclutch.php
http://www.c3powersports.com/content/ta ... ies-clutch
http://www.snoriderswest.com/gearboxx/a ... app_clutch
TBird
Expert
- Joined
- Dec 25, 2004
- Messages
- 379
- Reaction score
- 15
- Points
- 893
- Location
- North of Sweden
- Country
- Sweden
- Snowmobile
- Yamaha Viper and Yamaha Nypex
Have not been able to sled / test lately, been working and today it's been to cold.
No one sharing their settings surprise me a bit, i have only been able to sled 1 weekend this season due to lack of snow, but there must have been snow longer somewhere in the world,,,,,
No one sharing their settings surprise me a bit, i have only been able to sled 1 weekend this season due to lack of snow, but there must have been snow longer somewhere in the world,,,,,
HYFLYR
TY 4 Stroke Guru
With that much power why are you geared so low? Dont get me wrong I like low gearing and run the 20/40 gearing in many of my sleds and setups but anything over 250 I like to gear up, they can pull it no problem and it wont fall flat on top either.
TBird
Expert
- Joined
- Dec 25, 2004
- Messages
- 379
- Reaction score
- 15
- Points
- 893
- Location
- North of Sweden
- Country
- Sweden
- Snowmobile
- Yamaha Viper and Yamaha Nypex
It's mainly my driving that made me gear so low, i like to get my self in trouble in tight terrain when the only way out is feather the throttle and have very good response.
I've tried them all and found 20/40 be a good compromise, with my old clutch, in a couple of weeks when i hopefully have some more testing done i will try to gear up.
I agree with you, i will loose the long leg when geared so low, and for ex. 22/40 works awsome except when i'm in the tightest spots, but with the awsome belt grip this clutch has it might work with higher gearing even there, it's something i will definitively test again asap.
I've tried them all and found 20/40 be a good compromise, with my old clutch, in a couple of weeks when i hopefully have some more testing done i will try to gear up.
I agree with you, i will loose the long leg when geared so low, and for ex. 22/40 works awsome except when i'm in the tightest spots, but with the awsome belt grip this clutch has it might work with higher gearing even there, it's something i will definitively test again asap.
