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S&S CYCLE Crankcase - Natural Duo /Hydra Glide/Model KHK 90 31-0008
S&S CYCLE Crankcase - Natural Duo /Hydra Glide/Model KHK 90 31-0008
Regular price
$1,928.84 USD
Regular price
$2,143.15 USD
Sale price
$1,928.84 USD
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- Cast from A356 T-6 heat-treated aluminum alloy
- Include crankcase bolts, washers and nuts, cylinder mounting studs, timing hole plug, magnetic drain plug, assorted breather and oil line fittings, top end oil screen spring and plug, sprocket shaft Timken® bearing assembly, oil seal, pinion shaft main bearing race, cam needle bearing assembly, oil pump shaft bushings and installation instructions
- Use Timken style sprocket shaft bearings and 1958 and later pinion bearings (will not accept 1957 and earlier flywheels)
- Bearing races are all line honed and breather cavity is precision machined to optimize breather timing for maximum oil scavenging
- Machined for 3.4375" cylinders and tapped 1/4"-20 for gear covers, oil pump, tappet guides, timer and timer advance
- Drilled for 5/16" generator mounting bolts
- 65 models use 65 alloy inner primary
- 63-65 models with outside oil lines must use oil port to the rear of the tappet block or oil port in gear cover and use custom oil lines
- Made in the U.S.A.
- Generator crankcase gear kit (includes circuit breaker drive gear, idler gear, circuit breaker gear and shims) and shafts must be purchased separately
| 1958-1964 | Harley-Davidson | Duo Glide FLH | - | - |
| 1958-1964 | Harley-Davidson | Duo Glide FL | - | - |
| 1954-1956 | Harley-Davidson | Model KH 900 KH | - | - |
| 1954-1956 | Harley-Davidson | Model KHK 900 KHK | - | - |
| 1952-1953 | Harley-Davidson | Model K 750 K | - | - |
| 1952-1953 | Harley-Davidson | Model KK 750 KK | - | - |
| 1949-1957 | Harley-Davidson | Hydra Glide EL | - | - |
| 1949-1957 | Harley-Davidson | Hydra Glide FL | - | - |
| 1948-1964 | Harley-Davidson | FL | - | - |
| 1948-1964 | Harley-Davidson | FS | - | - |
| 1948-1951 | Harley-Davidson | WL 740 | - | - |
| 1948 | Harley-Davidson | 1200 UL | - | - |
Fitment Disclosure
This quick reference fitment information is provided to direct you to our catalog information and the manufacturer's information. Consult manufacturer publication(s) and/or website(s) for specific fitment and application information and other important information. This fitment information is based upon the stock version of the motorcycle or unit referenced and any accessory added or other modification could invalidate the quick reference information provided.
