New to Powersport Superstore? Try our Year-Make-Model search and find the right parts for your ride by clicking "My Garage" on the upper-right! ➡

Engine - Valve Train

2497 products
Powersport Superstore is your go-to source for Engine - Valve Train and related parts. Shop our unbeatable selection of Valve Train with top-tier service, fast shipping, and great prices.
Brand Show all Brand
Vehicle Type Show all Vehicle Type
Material Show all Material
Sprocket Position Show all Sprocket Position
Sprocket Teeth Show all Sprocket Teeth
Price
  • -
Show all Price
Vehicle Fitment Combos Show all Vehicle Fitment Combos
Kibblewhite Precision 71030-4 Red Viton Intake/Exhaust Valve Stem Seal
$22.29
$22.29
KPMI Red Viton valve stem seals are designed to have optimum fitment, allow for maximum lift, and to give maximum life. KPMI Red valve stem seals are resistant to high temperatures, petroleum produ...
Kibblewhite Precision 71016-4 Valve Guide Seals - 4pk. Kibblewhite Precision 71016-4 Valve Guide Seals - 4pk.
$18.20
$18.20
Type: Intake / Exhaust. Material: Red Viton. Reference: See Figure 1. Stem Diameter: 5.5mm. Overall Length: 0.320in. Seal O.D.: 0.440in. A: 0.358in.+/- 0.005in. B: 0.320in. C: 0.110in. D: 0.200in. ...
Kibblewhite Precision 71010-4 Red Viton Intake/Exhaust Valve Stem Seal Kibblewhite Precision 71010-4 Red Viton Intake/Exhaust Valve Stem Seal
$23.39
$23.39
Material: Red Viton. Reference: See Figure 1. Quantity: Pkg. of 4 (Seal Style 5). Stem Diameter: 5/16in. Overall Length: 0.412in. Seal O.D.: 0.566in. A: 0.420in. +/-0.002in. B: ---. C: ---. D: 0.27...
0% Off
Kibblewhite Precision 30-30590 Valve Spring Kit
$229.93
$229.93
$229.95
Lightweight Racing. Type: Intake / Exhaust. Retainer Material: Titanium. Valve Lift: 0.350in. Installed Height: 1.320in. Seat Pressure: 50#. Open Pressure: 145#. @ Lift: 0.350in.. Designed for max...
Kibblewhite Precision 71013-4 Valve Guide Seals - 4pk. Kibblewhite Precision 71013-4 Valve Guide Seals - 4pk.
$18.20
$18.20
Material: Red Viton. Reference: See Figure 1. Seal Style 2. Stem Diameter: 4.0mm. Overall Length: 0.310in. Seal O.D.: 0.380in. A: 0.315in. +/-0.005in. B: 0.270in. C: 0.120in. D: 0.235in. OEM REF. P...
Kibblewhite Precision 71011-4 Red Viton Intake/Exhaust Valve Stem Seal Kibblewhite Precision 71011-4 Red Viton Intake/Exhaust Valve Stem Seal
$23.50
$23.50
Material: Red Viton. Reference: See Figure 1. Quantity: Pkg. of 4 (Seal Style 4). Stem Diameter: 3/8in. Overall Length: 0.516in. Seal O.D.: 0.661in. A: 0.562in.+/-0.002in. B: ---. C: ---. D: 0.375i...
Kibblewhite Precision 20-20057 Black Diamond Exhaust Valve - Standard (39.75mm)
$42.31
$42.31
Material: Stainless SteelOEM# 18085-991. Head Diameter: 39.75mm / 1.565in. Stem Diameter: 7.9mm / 0.3095in. Tulip: 17deg. Overall Length: 4.505in.. Black Diamond valves feature one-piece stainless...
Kibblewhite Precision 71014-4 Valve Guide Seals - 4pk. Kibblewhite Precision 71014-4 Valve Guide Seals - 4pk.
$18.20
$18.20
Type: Intake / Exhaust. Reference: See Figure 1. Seal Style 4. Stem Diameter: 4.5mm. Overall Length: 0.331in. Seal O.D.: 0.370in. A: 0.321in. +/-0.005in. B: 0.281in. C: 0.120in. D: 0.240in. Note: U...
Kibblewhite Precision 40-40412 Black Diamond Intake Valve - Standard (30mm)
$32.83
$32.83
Material: Stainless SteelMust use spring kit. Black Diamond valves feature one-piece stainless steel construction with stellite tips and special impregnation to improve wear properties and reduce ...
Kibblewhite Precision 71015-8 Valve Guide Seals - 8pk. Kibblewhite Precision 71015-8 Valve Guide Seals - 8pk.
$38.26
$38.26
Type: Intake / Exhaust. Material: Red Viton. Reference: See Figure 1. Stem Diameter: 5.0mm. Overall Length: 0.350in. Seal O.D.: 0.405in. A: 0.340in. +/-0.005in. B: 0.303in. C: 0.125in. D: 0.230in. ...
Kibblewhite Precision 20-20326R Black Diamond Exhaust Valve - Oversize (41.40mm)
$50.67
$50.67
Material: Stainless SteelHead Diameter: 41.40mm / 1.630in. Stem Diameter: 7.0mm / 0.2755in. Tulip: 34deg. Overall Length: 4.520in.. Black Diamond valves feature one-piece stainless steel construct...
31% Off
Kibblewhite Precision 30-31150 Valve Spring Kit
$169.35
$169.35
$245.95
Lightweight Racing. Type: Intake / Exhaust. Retainer Material: Titanium. Valve Lift: 0.350in. Installed Height: 1.320in. Seat Pressure: 50#. Open Pressure: 145#. @ Lift: 0.350in.. Designed for max...
Kibblewhite Precision 71015-4 Valve Guide Seals - 4pk. Kibblewhite Precision 71015-4 Valve Guide Seals - 4pk.
$18.20
$18.20
Type: Intake / Exhaust. Material: Red Viton. Reference: See Figure 1. Stem Diameter: 5.0mm. Overall Length: 0.350in. Seal O.D.: 0.405in. A: 0.340in. +/-0.005in. B: 0.303in. C: 0.125in. D: 0.230in. ...
Kibblewhite Precision 30-31210 Intake Only Stainless Conversion Valve/Spring Kit
$185.23
$185.23
Material: Stainless SteelType: Intake. Retainer Material: Titanium. Valve Lift: 0.440in. Installed Height: 1.215in. Seat Pressure: 40#. Open Pressure: 147#. @ Lift: 0.440in.. Titanium intake valve...
Kibblewhite Precision 80-80215H White Diamond Center Intake Valve
$39.81
$39.81
Material: Stainless SteelStandard (Center In), Must use spring kit. We fully CNC machine our White Diamond Valves from a one-piece forging of either EV8 Stainless Steel or Inconel-751. These mater...
16% Off
Kibblewhite Precision 40-40312 Black Diamond Intake Valve
$33.61
$33.61
$39.95
Material: Stainless SteelHead Diameter: 36.00mm / 1.417in. Stem Diameter: 5.5mm / 0.2158in. Tulip: 20deg. Overall Length: 3.280in. Remarks: Standard. Note: Must use Kibblewhite Lightweight Valve Sp...
Kibblewhite Precision 71017-4 Valve Seals
$18.20
$18.20
All valve seals are made of 100% solid Viton for long life. Meet or exceed OEM specifications. When using Kibblewhite spring kits, Kibblewhite valve seals must be used because of spring clearances....
Kibblewhite Precision 60-60470 Intake Only Stainless Conversion Valve/Spring Kit
$172.56
$172.56
Material: Stainless SteelTitanium intake valve face recession is the most commonly repeated expensive repair on todays late model 4-strokes. Kibblewhite stainless valves and spring kits have proven...
Secure, Trusted, and Encrypted

Protected by industry-leading 256-bit SSL encryption and backed by Shopify’s PCI DSS–compliant infrastructure. Every page, click, and transaction is encrypted and monitored for threats — so you can shop with confidence knowing your data stays protected.

Parts for Every Machine

We stock aftermarket parts, gear and accessories for motorcycles, ATVs, UTVs, snowmobiles, personal watercraft, and even performance cars — all backed by expert support and live inventory.

Real-Time Fitment Accuracy

Search by Year, Make, and Model with confidence. Our proprietary vehicle fitment system ensures you’re only shown what fits — no guesswork, no returns — just parts that fit.

Fast, Trackable Shipping

We ship from over 20 U.S. warehouses — often same or next business day. Every order includes tracking and transparent fulfillment updates from start to finish, all processed through a secure, encrypted checkout.

Quick Links

Ride With Us. Stay Connected.

Follow us for real-time fitment updates, gear drops, and pro tips from the garage. No spam, just parts, tech, and news for riders like you.

Your Garage

Add a Vehicle