Rieken's Racing: Steel Nytro Clutches

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The Horstman Steel Nytro is definitely the top of the line on two-cycle racing clutches. This new high tech oil bath clutch beauty is ready to launch you into the winner's circle. Models are available with two disc for the Sportsman competitor who is looking for a clutch that performs great and will require less maintenance than a dry clutch. For Yamaha Pipe classes a three disc version in the correct choice. For Heavy Weight classes the four disc version is preferred. Click here for owner's manual. 2001 Manual
OUTSTANDING FEATURES

Small Diameter & Light Weight	=Quicker acceleration & more revs on top end
All Billet Construction	=Better balance, rigidity & durability
"T" Shape Cam Action Lever	=Positive lockup
New design of adjustment screws & retainers	=Easy adjustment without clutch removal from engine

Horstman Steel Nytro Clutches Complete:

Part #	Description	Application (From Horstman)	List	Sell
	Two Disc Clutch	Yamaha Sportsman, YBX exhaust	329.32	230.52
	Three Disc Clutch	Yamaha Super Sportsman, SSX-V exhaust	354.67	248.27
	Three Disc Clutch	Yamaha Light Classes	356.09	249.26
	Four Disc Clutch	Yamaha Heavy Classes	382.02	267.41

Steel Nytro Parts

Part #	Ref#	Horstman Clutch Spacers	List	Sell
	1	Spacer, Special -- Small O.D. (.665") For use with 10t #219 & 11t #215 drums only Three widths available Tech tip: Usually takes a .145" with the 10t #219 drum	3.94	3.15
	1	Spacer, Standard O.D. (.740") Fits drums with 9t#35, 11t#219 & 12t#215 15 widths available Tech tip: Usually takes a .145" wide spacer	3.94	3.15
H324500		Spacer Kit Contains 1 each standard spacer (.065" through .205")	56.49	42.37
	1	Spacer, Special -- Large O.D. (.830") Fits drums with 12t#219, 10t#35 & 13t#215 Five widths available Tech tip: Usually takes a .145" wide spacer	3.94	3.15

Steel Nytro Clutch Drums & Sprockets

Part #	Ref#	Description	List	Sell
	2	Drum, 2 Disc Clutch	65.80	49.35
	2	Drum, 3 Disc Clutch	65.80	49.35
	2	Drum, 4 Disc Clutch	65.80	49.35
H330148		Drum Only 2 Disc with Clips sold without sprocket	44.56	35.65
H330149		Drum Only 3 Disc with Clips sold without sprocket	46.05	36.84
H330150		Drum Only 4 Disc with Clips sold without sprocket	47.53	38.02
H330400	3	Bearing (fits 10t #219 drums only)	15.33	6.85
H300300	3	Replacement Brass Bushing Fits 9t #35 & 11t #219 Reaming required after installation	6.73	5.38
H300400	3	Replacement Needle Bearing Fits 12t-15t #219, 10t-15t #35	10.08	8.06
H330134		Replacement Sprocket, 9t #35 Includes: Sprocket, bearing & screws	36.05	28.84
H330135		Replacement Sprocket, 10t #35 Includes: Sprocket, bearing & screws	37.49	29.99
H330136		Replacement Sprocket, 15t #35 Includes: Sprocket, bearing & screws	40.38	32.30
H330137		Replacement Sprocket, 10t #219 Includes: Sprocket, bearing & screws	43.26	34.61
H330138		Replacement Sprocket, 11t #219 Includes: Sprocket, bearing & screws	36.05	28.84
H330139		Replacement Sprocket, 12t #219 Includes: Sprocket, bearing & screws	40.38	32.30
H330140		Replacement Sprocket, 13t #219 Includes: Sprocket, bearing & screws	41.83	33.46
H330141		Replacement Sprocket, 15t #219 Includes: Sprocket, bearing & screws	43.26	34.61
H330147		Screw, 10-32 x ¼" Flat Head	0.44	0.35

Steel Nytro Clutch Hubs

Part #	Ref#	Description	List	Sell
H330015	4	Yamaha 2 Disc Hub	118.56	88.92
H330016	4	Yamaha 3 Disc Hub	120.14	90.11
H330017	4	Yamaha 4 Disc Hub	121.72	91.29

Steel Nytro Clutch Parts

Part #	Ref#	Description	List	Sell
H325701	5	Friction Disc, Semi-Metallic	33.24	26.59
H326000	6	Floater .050", Standard	24.08	19.26
H327800	6	Floater .040", optional	24.08	19.26
H327900	6	Floater .045", optional	24.08	19.26
H328000	6	Floater .055", optional	24.08	19.26
H328100	6	Floater .060", optional	24.08	19.26
H330025	7	Pressure Plate (replaced by H333328)
H333328	7	Pressure Plate, NEW STYLE Uses H334700 & H334800 retainers & screws	92.70	69.53
H330026	8	Lever Support	71.15	53.36
H330027	9	Dowell Pin	0.80	0.64
H330037	10	10 gram Lever, New style For Steel Nytro Clutches except Super Sportsman	11.29	9.03
H330088	10	10.7 gram Lever For Super Sportsman 3 Disc Clutch	10.76	8.61
H330089	10	Lever Set Contains 6 pcs., 10.7 gram #H330088 levers.	48.46	38.77
H330028	10	Lever, LH Snub, Old Style	4.27	3.42
H330029	10	Lever, RH Standard, Old Style	4.27	3.42
H326600	11	Coned Washer	5.51	4.41
H326700	12	Nut, 1-1/8" Hex, LH Thread	8.52	6.82
H327500	13	Bearing, Cover	9.48	7.58
H703600	14	Starter Nut, 2 disc clutch	22.82	17.12
H327400	14	Starter Nut, 3 & 4 disc clutch	22.28	16.71
H327600	15	Plug, oil fill	1.28	1.02
H327200	16	Cover Bolt	0.85	0.68
H330031	17	Spring Adjuster Old Style. Fits H330025 pressure plate.	4.14	3.31
H334700	17	Spring Retainer, Aluminum New Style. Fits H333328 pressure plate. Use with H334800 screw, spring	1.23	0.98
H334800	17	Screw, Spring Retainer New Style. Fits H333328 pressure plate. Use with H334700 spring retainer	1.23	0.98
H328200	18	Spring .085", standard 2 disc clutch	5.07	4.06
H313000	18	Spring .091", standard 3 & 4 disc clutches	4.82	3.86
H330032	19	Cover, 2 Disc	78.96	59.22
H330044	19	Finned Cover, 3 or 4 Disc	92.92	69.69
H326900	20	Gasket	4.30	3.44
H330033	21	Drive Clip, 2 Disc Drum	1.98	1.58
H330034	21	Drive Clip, 3 Disc Drum	1.98	1.58
H330035	21	Drive Clip, 4 Disc Drum	1.98	1.58
H309300		Woodruff Key	2.38	1.90

Part #	Description	List	Sell
H330022	Rebuild Kit, 2 Disc Clutch	136.74	102.56
H330023	Rebuild Kit, 3 Disc Clutch	190.49	142.87
H330024	Rebuild Kit, 4 Disc Clutch	242.65	181.99
H330125	Clutch Coolant	27.77	20.83

Clutch Tools | Blueprinted Clutch Springs

Rieken's Racing offers expert rebuilding of all Horstman disc clutches. Please email for details.

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