The Variable Pressure Clutch (VPC) by Tak's Performance Parts is not 'just a lock-up clutch'. The VPC is a system that reduces spring pressure at idle, and as the centrifugal force increases in line with rising engine rpm it provides the clutch with the required pressure to match engine torque. Zipper's is located in Elkridge, MD in the business park at the junction of MD100 and US1, just south of Baltimore. 6655-A Amberton Drive Elkridge, MD 21075. The Variable Pressure Clutch (VPC) by Tak's Performance Parts (AIM Corp in the United States) is not 'just a lock-up clutch'. The VPC is a system that reduces spring pressure at idle, and as the centrifugal force increases in line with rising engine rpm, it provides the clutch with the required pressure to match engine torque. 日本特許 3808091, 1252281, 3976205 国際特許 jp2004/007658 vpクラッチの特徴 必要な時に必要な圧力をクラッチに与えるため低回転域(市街地中低速走行時)では最高約55%(注1)軽くクラッチ操作が可能です。.
S&S has a long history of making a lot of power, and a lot of stock clutches have been sacrificed to the 'Gods Of Speed'. S&S has come up with a couple of economical ways to beef up your stock clutch so it can handle the power an S&S engine can throw at it.
This Variable Pressure Clutch gives you up to 40% more additional pressure for clutch engagement. Fits behind a stock derby cover and primary cover with NO modification required. The upgrade is a 10 minute installation… Brivis fault code manual online.
For 1998-up Big Twins with 6 Stud Clutch Hub (Does not fit: ‘13 and later CVO™ and Tri-Glide™, ‘15 and later Ultra Limited Low and Electra Glide Classic Low Models with New H-D® Assist and Slipper Clutch: 3 Stud Clutch Hub) Only $284.95.
S&S also offers a Transmission Mainshaft Bearing Race that won't 'walk' on the shaft when you pour the coal to it. The improved S&S bearing race is a must for any high performance application. Fits 2006-2007 & 2010 – up Big Twins. $51.95.
And to make your stock 1998-later Big Twin clutch a contender, install the new S&S Heavy Duty Diaphragm Spring. And if that isn't enough, put the squeeze on your clutch pack with the S&S Variable Pressure Plate. The weighted clutch fingers use centrifugal force to increase the pressure on the plates. The faster you spin your engine, the stronger your clutch engagement, all without increasing the clutch lever pull at idle. 380 lbs pressure, 25% stronger than stock. $32.49. More info at S&S Cycle Go Fast.
The Variable Pressure Clutch (VPC) by Tak's Performance Parts is not 'just a lock-up clutch'. The VPC is a system that reduces spring pressure at idle, and as the centrifugal force increases in line with rising engine rpm it provides the clutch with the required pressure to match engine torque. Zipper's is located in Elkridge, MD in the business park at the junction of MD100 and US1, just south of Baltimore. 6655-A Amberton Drive Elkridge, MD 21075. The Variable Pressure Clutch (VPC) by Tak's Performance Parts (AIM Corp in the United States) is not 'just a lock-up clutch'. The VPC is a system that reduces spring pressure at idle, and as the centrifugal force increases in line with rising engine rpm, it provides the clutch with the required pressure to match engine torque. 日本特許 3808091, 1252281, 3976205 国際特許 jp2004/007658 vpクラッチの特徴 必要な時に必要な圧力をクラッチに与えるため低回転域(市街地中低速走行時)では最高約55%(注1)軽くクラッチ操作が可能です。.
S&S has a long history of making a lot of power, and a lot of stock clutches have been sacrificed to the 'Gods Of Speed'. S&S has come up with a couple of economical ways to beef up your stock clutch so it can handle the power an S&S engine can throw at it.
This Variable Pressure Clutch gives you up to 40% more additional pressure for clutch engagement. Fits behind a stock derby cover and primary cover with NO modification required. The upgrade is a 10 minute installation… Brivis fault code manual online.
For 1998-up Big Twins with 6 Stud Clutch Hub (Does not fit: ‘13 and later CVO™ and Tri-Glide™, ‘15 and later Ultra Limited Low and Electra Glide Classic Low Models with New H-D® Assist and Slipper Clutch: 3 Stud Clutch Hub) Only $284.95.
S&S also offers a Transmission Mainshaft Bearing Race that won't 'walk' on the shaft when you pour the coal to it. The improved S&S bearing race is a must for any high performance application. Fits 2006-2007 & 2010 – up Big Twins. $51.95.
And to make your stock 1998-later Big Twin clutch a contender, install the new S&S Heavy Duty Diaphragm Spring. And if that isn't enough, put the squeeze on your clutch pack with the S&S Variable Pressure Plate. The weighted clutch fingers use centrifugal force to increase the pressure on the plates. The faster you spin your engine, the stronger your clutch engagement, all without increasing the clutch lever pull at idle. 380 lbs pressure, 25% stronger than stock. $32.49. More info at S&S Cycle Go Fast.
VP 68/84/95 for '98 and later Harley-Davidson Big Twin models
Note: VP Performance Kits and VP Charger Kits ---Requires removing the outer primary cover to change the diaphragm spring. Non-stock derby covers (including any special or '03 anniversary cover) and 3 holes derby covers may require a derby cover spacer. Clutch pull becomes heavier as RPM increases. Will fit models equipped with H-D hydraulic clutch.
Variable Pressure Clutch (vpc By Tak's Performance Parts List
1. Turn cable adjuster until there is a large amount of free play at the clutch hand lever. | 2. Remove derby cover. |
3. Loosen lock nut on the clutch adjuster screw. | 4. Adjust clutch adjuster screw. To take up all free play, turn screw inward (clockwise) until gently seated. Activate the clutch lever to verify the balls of Ball & Ramp (in right side transmission) are seated in the ramps. Back out adjuster screw (counterclockwise) 3/4 to 1 turn. Tighten lock nut while holding adjuster screw with an Allen wrench. |
5. Loosen the spring retainer evenly a little at a time using a 10 mm socket wrench. | 6. Pull the spring retainer and remove it. |
7. Bend the 6 base plate tabs slightly outward. | 8. Showing bented base plate. |
9. Install base plate. Starting with widest tab on the base plate insert it inside the diaphragm spring. | 10. Ensure that it is seated all the way in. |
11. Install the VP clutch. if you install it from one of the bottom levers first then it will go in easily. | 12. Use the provided bolts and tighten evenly with a 5 mm Allen wrench. Ensure the diaphragm spring is not out of position and start tightening the bolts. Finally, tighten to a torque of 90-110 in-lbs (10.2-12.4 Nm). |
13. Adjust the clutch cable. Ensure free play of 1/8' or more at the clutch lever pivot between the clutch holder and lever without pulling the cable. | 14. Install derby cover gasket (Parts#AIM003-001) and derby cover. Tighten bolts to 84-108in-lbs (9.5-12.2 Nm). |
Tech Note: You can use 18 mm spark plug socket to tighten lock nu t. | Tech Note: Adjusting adjuster screw with using 18 mm spark plug socket. |