Dynojet Thunderslide Kit - Stage 1 `1990-2000 EVO 1340 — Harley-Davidson Electra Glide Classic, Softail Custom, Softail Heritage Classic (1984-1999)

Dynojet Thunderslide Kit Stage 1 is a custom carburetor slide assembly for 1990-2000 Harley EVO 1340 engines that improves fuel atomization and throttle response. The precision-engineered slide design enhances power delivery and fuel economy. Not street-legal in California—verify local emissions laws before purchase.

Features

• Custom-engineered carburetor slide
• Improved fuel atomization
• Stronger throttle signal
• Increased power and throttle response
• Enhanced fuel economy

Specifications

• Brand: Dynojet
• Manufacturer Part #: 8108
• Length: 3.75 in
• Width: 7.9 in
• Height: 1.5 in
• Weight: 0.37 lbs

Fitment

Fits 1990-2000 Harley-Davidson EVO 1340 models with Mikuni or Teikei carburetors. Not legal for street use in California.

Frequently Asked Questions

Is this street-legal?

Not in California. Check your state and local emissions regulations before installation—many areas restrict aftermarket carb modifications.

Will this fit my 2001+ Twin Cam?

No—this kit is for 1990-2000 EVO 1340 engines only. Twin Cam models require a different Dynojet product.

What carburetors does this work with?

This slide fits Mikuni and Teikei carburetors commonly found on EVO 1340s. Verify your carb type before ordering.

Does installation require jetting changes?

Yes—a carburetor tune and possible jetting adjustment may be needed to maximize performance gains with this slide.