Sale

Dynojet

Stage 1 Jet Kit

$198.27 $188.36 Save $9.91

SKU: 4124

In Stock
In Stock
Ships by Aug 29
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

The Dynojet DJY-4124 is a Stage 1 jet kit specifically engineered for the 1978-1979 Yamaha XS1100 models. Dynojet jet kits provide a straightforward solution for carburetion tuning. The Stage 1 kit is typically intended for motorcycles with stock exhaust systems or those that have undergone minor modifications such as the addition of an aftermarket exhaust. The kit includes necessary components and instructions to optimize the fuel mixture for improved performance. Specific instructions mention using DJ124 main jets with stock exhausts and DJ128 main jets with aftermarket exhausts, emphasizing the importance of confirming the correct main jets are being replaced.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

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Available on iOS & Android

Specifications

BrandDynojet
Part Number4124
CategoryAir and Fuel

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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