Your shopping cart is currently empty.
Kibblewhite Precision Valve Springs
This item requires Vehicle Fitment, please select Vehicle first!
OR if you know the Part Number you need, select from Options below.
OR if you know the Part Number you need, select from Options below.
#80-80394 Yamaha R1 98-03 / RX1 03-10
Part #:80-80394
Availability:
80-80394 Yamaha R1 98-03 / RX1 03-10
MSRP:
$366.40 (USD)
Since 1938, KPMI® has taken great pride in our ability to design innovative performance improvements for valvetrains. This innovative ability has never been more apparent than with the development of the high tech lightweight racing valve spring kits for the incredibly stressed and torturous environment in today's high revving 4-stroke engines.
The challenge to engineer a valvetrain that would outperform OEM systems, that in some cases included titanium components, was not an easy one. This task would require the concentrated efforts of every member of KPMI®'s design team. It was apparent early on that an OEM style spring with a bit more pressure was not going to be the complete answer for these engines. Working together as a team enabled KPMI® to evolve with a "unified system" approach. In fact, these innovative high performance lightweight valve spring kits, would not only outperform factory parts, but outlive them as well.
Each KPMI® spring kit is designed for its specific application, taking into account several critical parameters including; cam profiles, harmonics, natural frequency of the springs, valvetrain mass, required pressure, wire stress, fatigue life, and engine rpm, just to name a few!
Includes 12 Intake valve springs, 8 exhaust valve springs and base washers
Intake Seat Pressure at Installed Height (lbs): 30 lbs.
Intake Valve Maximum Lift (in.): 0.350 in.
Exhaust Seat Pressure at Installed Height (lbs): 44 lbs.
Exhaust Valve Maximum Lift (in.): 0.315 in.
The challenge to engineer a valvetrain that would outperform OEM systems, that in some cases included titanium components, was not an easy one. This task would require the concentrated efforts of every member of KPMI®'s design team. It was apparent early on that an OEM style spring with a bit more pressure was not going to be the complete answer for these engines. Working together as a team enabled KPMI® to evolve with a "unified system" approach. In fact, these innovative high performance lightweight valve spring kits, would not only outperform factory parts, but outlive them as well.
Each KPMI® spring kit is designed for its specific application, taking into account several critical parameters including; cam profiles, harmonics, natural frequency of the springs, valvetrain mass, required pressure, wire stress, fatigue life, and engine rpm, just to name a few!
Includes 12 Intake valve springs, 8 exhaust valve springs and base washers
Intake Seat Pressure at Installed Height (lbs): 30 lbs.
Intake Valve Maximum Lift (in.): 0.350 in.
Exhaust Seat Pressure at Installed Height (lbs): 44 lbs.
Exhaust Valve Maximum Lift (in.): 0.315 in.
Customer Reviews
Kibblewhite Precision Machining, Inc. is a 78 year old valvetrain manufacturing company supplying an extensive product line solely dedicated to the motorsport industry. This wealth of knowledge reflects in the highest level product detail, fitment and material choices which meet or exceed the mechanical work they will be asked to do.
Kibblewhite Precision Valve Springs fits the following vehicle(s):
- 2003 Yamaha RX1
- 2004 Yamaha RX1
- 2005 Yamaha RX1
- 2006 Yamaha RX1
- 2007 Yamaha RX1
- 2008 Yamaha RX1
- 2009 Yamaha RX1
- 2010 Yamaha RX1
- 1998 Yamaha YZFR1
- 1999 Yamaha YZFR1
- 2000 Yamaha YZFR1
- 2001 Yamaha YZFR1
- 2002 Yamaha YZFR1
- 2003 Yamaha YZFR1