Engine Services
Throttle Body Boring (LC4)
We bore the LC4 throttle body to a true 50 mm.
From $125.00
Available — built to order
- Fits
- KTM 690, Husqvarna 701, GasGas 700
- Years
- All years
- Service
- Mail-in to Stevens Point, Wisconsin
- Fitment notes
- LC4 throttle bodies (KTM 690, Husqvarna 701, GasGas 700).
- Bored to a true 50 mm
- Mail-in service
- Custom and larger sizes quoted separately
Product Details
The LC4 throttle body is specified at 50 mm but measures 48.5 mm past the throttle plate. We bore it to a true 50 mm.
Custom or larger work costs more. Contact us for a quote.
How it works
- Place your order here.
- Remove your throttle body and ship it to us, tracked and insured. Our shipping address is shown on your order confirmation page. Include a note with your name, phone or email, order number and your bike's year and model.
- We bore it and ship it back.
Dyno-Tested Builds
Featured in These Dyno-Tested Builds
This part was one piece of the builds below. Each dyno page shows the full parts list and results for the complete build.
Complete the Build
Pairs Well With
Intake SystemsJB Performance Stage 3 Standard Intake (5"), K&N Filter
Dyno-developed 5" high-flow intake with a K&N filter for the 2017–2025 KTM 690, Husqvarna 701 and GasGas 700.
~3 lb vs stock
Intake SystemsJB Performance Stage 3 Standard Intake (5"), Uni Filter
The same 5" Stage 3 Standard Intake with a Uni two-stage foam filter: ideal for dusty enduro and off-road riding.
~3 lb vs stock
Intake SystemsJB Performance Intake: 2026–2027 KTM 690 SMC R / Husqvarna 701
Our new-generation standard (5") intake for the 2026–2027 KTM 690 SMC R and Husqvarna 701.