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Pilot Screw O-Ring Needle & Seat O-Ring
42mm Float Pin Screw
Our Price: $0.59
Pilot Air Screw O-Ring
Our Price: $0.99
Needle & Seat O-Ring
Our Price: $0.99
HSR 42/45/48 float pin screw
Replacement O-Ring for the Pilot Air Screw Needle Valve O-Ring
42mm Jet Needle Washer
42mm Jet Needle Washer
Our Price: $0.99
Mikuni float pin
Our Price: $1.59
42mm Jet Needle Washer Mikuni Jet Needle E-Ring (clip) Mikuni float pin - Carry a spare in the trailer!
Drain O-ring
42mm Needle Retainer
Our Price: $1.89
33mm/42mm Bowl Screw
Our Price: $1.99
Drain O-ring
Our Price: $1.99
We know, you were adjusting your needle..set your retainer on the rear wheel....darn wind! Where did it go?...happens everytime! Oh, the joys of racing! Set of 4 Allen Head Screws O-ring for the 36mm, 40mm or 42mm Drain Plugs
Cable Adjuster
Cable Adjuster - Long
Our Price: $2.99
42mm Float Bowl Screws
Our Price: $2.99
Yep, we know...stripped the head off...Here's your replacement! Be smart...carry a spare! Mikuni Cable Adjuster fits top of carb, includes jam nut. This is an extended length version.
Replacement 42mm Float Bowl Screws (set of 4)
42mm Needle Valve O-Ring Mikuni Air Jets Mikuni Large Round Main Jets
Mikuni Air Jets
Our Price: $3.00
Replacement 42mm Needle Valve O-Ring Jet measures 8mm/.300" long and has a 4mm/.125 diameter screw slotted face.

Jet measures 9mm/.350" long and has a 8mm/.315 round screw slotted face
Mikuni 486 Pilot Jets OverFlow Hose
Mikuni 486 Pilot Jets
Our Price: $3.00
42mm OverFlow Hose
Our Price: $3.99
Mikuni Pilot Jets. Jet measures 28mm/1.1" long and has a 5mm/.200" slotted faced head. Also identified by having 8 small bleed holes. Replacement 42mm Throttle Return Spring. Replacment 42mm OverFlow Hose
42mm Bowl O-Ring 42mm Body O-Ring
42mm Bowl O-Ring
Our Price: $4.99
42mm Body O-Ring
Our Price: $4.99
Replacement O-Ring for 42mm Carb. Replacement 42mm Accelerator Pump Piston return spring Replacement O-Ring for 42mm Carb.
42mm Top Cover Gasket 42mm Accelerator Pump Rod Boot 42mm Throttle Cable Pulley
42mm Top Cover Gasket
Our Price: $4.99
Replacement 42mm Top Cover Gasket Replacement 42mm Accelerator Pump Rod Boot

Mikuni Part # TM36/64
Mikuni HSR-42 Throttle Cable Pulley
42mm Throttle Valve Seal
42mm Plunger
Our Price: $5.99
Replacement Plunger for your 42mm Mikuni Replacement Throttle Valve Seal for the 42mm Mikuni Mikuni HSR 42mm Fuel Retainer Inlet
42mm Air Screw Kit 42mm Return Lever 42mm Throttle Cable Lever
42mm Air Screw Kit
Our Price: $9.99
42mm Return Lever
Our Price: $10.49
42mm Throttle Cable Lever
Our Price: $10.99
Carry a spare or replace the one you lost with this handy little kit....includes everything that goes in the hole. Factory Replacement - 42/45/48 mm Return Lever - Carry a spare! 42mm Throttle Cable Lever
42mm Top Cover Drain Plug 42mm Idle Adjuster Cable
42mm Top Cover
Our Price: $12.99
42mm Drain Plug
Our Price: $17.99
42mm Idle Adjuster Cable
Our Price: $18.99
Replacement Top Cover for the 42mm Carb Replacement 42mm Drain Plug Replacement 42mm Idle Adjuster Cable
Viperizer 33mm 45mm Jet Block Needle and Seat 42mm Needle and Seat
42mm Needle & Seat - 4.2
Our Price: $21.99
42mm Needle & Seat - 2.3
Our Price: $22.99
Holds 10 Mains, 12 air and 5 Pilots jets

42mm Needle & Seat - 4.2 42mm Needle & Seat 2.3
Deep Bowl Plug 42mm Float 42mm/45mm 8' Throttle Cable
42mm Deep Bowl Plug kit.
Our Price: $24.99
42mm Float
Our Price: $24.99
HSR Main Jet Extender Kit - Add a little more fuel capacity to your 42mm with this Deep Bowl Plug kit. Replacement Float for 42mm Carb. Throttle Cable W/Barrel end 42mm/45mm 8', Nylon liner, correct barrel end, correct diameter threaded adjuster for billet carb tops.
42mm Intake Rubber Flange 42mm Cable Bracket Assembly
42mm Intake Rubber Flange
Our Price: $27.99
42mm Float Bowl
Our Price: $35.99
42mm Intake Rubber Flange Mikuni HSR-42 Throttle Cable Bracket Assembly

Replacement 42mm Float Bowl
Mikuni 42mm Flatslide Carburetor
Viperizer 42mm Billet Top
Our Price: $45.99
42mm Throttle Valve
Our Price: $59.99
Viperizer Billet top for 42mm carbs. Easy to adjust idle knob. Replacement 42mm Throttle Valve Mikuni 42mm Flatslide Carb