ProTaper Twister Throttle Assembly
1004-9856 (MFG #: 025073)
$69.99
Sale price
$69.99
Regular price
$69.99
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ProTaper Twister Throttle Assembly for Yamaha WR400F Dirt Bike
ProTaper Twister Throttle Assembly for Yamaha WR400F Dirt Bike
$69.99
Sale price
$69.99
Regular price
$69.99
SKU:1004-9856
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Description
The Twister Throttle Tube from ProTaper is constructed from quality anodized billet aluminum. The sealed radial ball bearing and polymer bushing allow for a consistent and smooth throttle operation while a knurled grip mounting area ensures a vice-like grip bond. The ProTaper Twister Throttle tubes are used by top-level pro teams and riders world wide. Twister Throttle Tubes are compatible with all ProTaper handlebars and Renthal 7/8 in. handlebars with the standard bearing insert.
FEATURES
- Features a sealed ball bearing that virtually eliminates friction and nylon sleeve bearing on the inboard end
- Crud plug stops grip glue form ruining bearing
- All Twister throttle tubes include a free insert for all ProTaper® bars
Technical Specifications
- MFG. Part Number 025073
Vehicle Information
Yamaha WR400F Dirt Bike (1998-2000)
The Yamaha WR400F, produced from 1998 to 2000, was a pioneering four-stroke enduro motorcycle renowned for its powerful engine and exceptional off-road capabilities. This model featured a single-cylinder, four-stroke, DOHC, 5-valve engine with a 399 cc displacement across all years. It was offered as a single "Enduro" or "Off-road" model, without distinct sub-trims. The WR400F saw significant evolution during its initial run. Introduced in 1998, it was derived from the YZ400F motocrosser. In 1999, it received updates to its suspension and engine calibration, alongside carburetor modifications for improved starting. The 2000 model year brought substantial changes, including a slimmer seat and fuel tank (reducing capacity to 8 liters), making the bike 2.5 kg lighter. Other enhancements included faster suspension damping, a stiffer lower triple-clamp, and a repositioned steering head to shorten the wheelbase, alongside further chassis, ignition, and engine refinements. FAQ:
Q: How do I ensure this product fits my Yamaha WR400F?
A: To guarantee compatibility, please use the year and edition selector at the top of this page to specify your exact model year.
Maintenance
| Component | Interval | Details |
| Engine Oil Changes | 1998: 5 h (aggressive riding) or 10 h (recreational); 1999-2000: 10 h (aggressive riding) or 15 h (recreational) | |
| Oil Filter | Every oil change (2000 model); or every 6,000 km (general Yamaha recommendation) | |
| Air Filter Service | 5 h (aggressive riding) or 10 h (recreational) | Regular inspection, cleaning, and re-oiling are crucial, especially after riding in dusty conditions. |
| Spark Plug | Inspection at 100 h or 1 year | |
| Coolant | Leakage inspection at 20 h (or 3 months) and 100 h (or 1 year) | No specific replacement interval provided. |
| Valve Inspections | 1998: 10 h (aggressive riding) or 20 h (recreational); 1999: 20 h (all styles); 2000: 20 h (aggressive riding) or 30 h (recreational) |
Intervals may vary based on riding conditions. Consulting the official owner's manual for precise details is recommended.