For Information as to what is fitted/supplied in a carb as standard when purchased new. Click Here
JETS - Quick Guide
Amal main jet - part number 17 (376/100+size) - Fits mark 1 and 2 - Range from 140 to 400
Amal idle / power jet - part number 26 or 46 (124/126+size) - Fits mark 1 and 2 - Range from 20 to 90
Dellorto main jet part number 4576 - Fits SI etc.- push in type - Range from 80 to 135
Dellorto main jet part number 6413 - Fits PHB etc.- thread size 6mm - Range from 50 to 180
Dellorto idle jet part number 1488 - Fits PHBG - thread size 5mm - Range from 30 to 70
Dellorto main/idle jet part number 1486 - Fits PHB/SH etc.- thread size 5mm - Range from 40 to 140
Dellorto idle jet part number 12995 - Fits VHSB etc.- thread size 5mm - Same as 1486 but 4mm longer - 1486 can be used as a substitute - Range from 30 to 120
Dellorto idle jet part number 11600 - Fits PHVA and PHVB Carbs.- thread size 4mm - Range from 30 to 120
Dellorto long idle jet part number 3360 - Fits SH etc.- thread size 5mm - Range from 32 to 55
Dellorto long idle jet part number 8022 - Fits SH etc.- thread size 5mm - Same as 3360 but longer tip - 3360 can be used as a substitute - Range from 32 to 55
Dellorto long idle jet part number 9892 - Fits SI/H etc.- thread size 5mm - Shorter than 11868 to suite the shorter in height H type carb - Range from 48/100 to 55/160
Dellorto long idle jet part number 6935 - Fits SI early etc.- thread size 5mm - Range from 48 to 55 - no air correction hole as in later models
Dellorto long idle jet part number 11868 - Fits SI etc.- thread size 5mm - with air corrector hole - Range from 48/100 to 55/160
KN main jet - Thread size 4mm - Range from 74 to 100
TK main jet - Thread size 6mm - Range from 74 to 100
GURTNER main jet - Thread size 6mm metric fine .75mm pitch - Range from 56 to 120 in increments of 2
MIKUNI main jet 4/042 - Range from 50 to 500. 50 to 200 in increments of 5, 200 to 500 in increments of 10
MIKUNI idle jet for VM, TM, TMX - Range from 10 to 30.In increments of 2.5
GURTNER JET
COMMON DELLORTO JETS
| Dellorto Carb | Main Jet Type | Idle Jet Type |
| MA 18mm + 19mm | 1486 (5mm) | 3360 |
| MB 21mm + 23mm | 1486 | 3360 |
| PHBE 30mm - 38mm | 6413 (6mm) | 1486 |
| PHBG 15mm - 21mm | 1486 | 1488 |
| PHBH 26mm - 30mm | 6413 | 1486 |
| PHBL 20mm - 26mm | 6413 | 1486 |
| PHBN 12mm - 17.5mm | 6413 | 11600 |
| PHF 30mm - 36mm | 6413 | 1486 |
| PHM 38mm - 41mm | 6413 | 1486 |
| PHVA 12mm - 17.5mm | 6413 | 11600 |
| PHVB 18mm - 22mm | 6413 | 11600 |
| SHA1 18 + 20mm | 1486 | 3360 |
| SHA2 22mm | 1486 | 3360 |
| SHA 9mm - 16mm | 1486 | - |
| SHB 10mm - 16mm | 1486 | 3360 |
| SHBC 19mm - 20mm | 1486 | 3360 |
| SHBC 19mm + 20mm PK | 1486 | 8022 |
| SI 17 to 21mm | 4576 (push in) | 6935 |
| SI20 + SI24 DE+G 20mm+24mm | 4576 | 11868 |
| SI24H | 4576 | 9892 |
| VHSA 28mm + 32mm | 6413 | 1486 |
| VHSH 30mm + 32mm | 6413 | 12995 or 1486 |
| VHBT 27mm - 30mm | 6413 | 1486 |
| VHSB 34mm - 39mm | 6413 | 12995 or 1486 |
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MIKUNI TM24 JET KIT Main jets - 180, 200, 210, 220. idle jets - 12.5, 17.5. Atomizer - 454 Q2. |
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MIKUNI TM24 Needle kit - 615 L08, 615 J20 + needle clip |
| Amal Carb - Mark 2 | Main Jet Type | Idle Jet Type | Air Filter Size |
| 28mm to 34mm | 376/100+size | 124/026+size | 57mm use 54mm |
| Dellorto Carb | Main Jet Type | Idle Jet Type | Air Filter Size |
| MA 18mm + 19mm | 1486 | 3360 | 32mm |
| MB 21mm + 23mm | 1486 | 3360 | |
| PHBE 30mm - 38mm | 6413 (6mm) | 1486 (5mm) | |
| PHBG 15mm - 21mm | 1486 | 1488 | 32mm |
| PHBH 26mm - 30mm | 6413 | 1486 | 42mm for threaded and unthreaded. |
| PHBL 20mm - 26mm | 6413 | 1486 | 39mm |
| PHBN 12mm - 17.5mm | 6413 | 11600 | 37mm use 35mm |
| PHF 30mm - 36mm | 6413 | 1486 | |
| PHM 38mm - 41mm | 6413 | 1486 | |
| PHVA 12mm - 17.5mm | 6413 | 11600 | 37mm use 35mm |
| PHVB 18mm - 22mm | 6413 | 11600 | 42mm |
| SHA1 18 + 20mm LAM Li | 1486 | 3360 | |
| SHA2 22mm - LAM GP | 1486 | 3360 | 45mm |
| SHA 9mm - 16mm | 1486 | - | - |
| SHB 10mm - 16mm | 1486 | 3360 | 62mm use 60mm Not for studded version |
| SHBC 19mm - 20mm | 1486 | 3360 | 62mm use 60mm Not for studded version |
| SHBC 19mm + 20mm PK | 1486 | 8022 | 62mm use 60mm |
| SI 17 to 21mm | 4576 | 6935 | |
| SI20 + SI24 DE+G 20mm+24mm PX | 4576 | 11868 | Carb Box 57.5mm use 54mm |
| SI24H T5 | 4576 | 9892 | Carb Box 57.5mm use 54mm |
| VHB 28mm - 30mm | 6413 | 1486 | 40mm use 39mm |
| VHBT 27mm - 30mm | 6413 | 1486 | |
| VHBZ 22mm | 6413 | 1486 | 32mm |
| VHSA 28mm + 32mm Flat slide | 6413 | 1486 | |
| VHSH 30mm - 34mm Flat slide | 6413 | 12995 or 1486 | 65mm |
| VHSB 34mm - 39mm Flat slide | 6413 | 12995 or 1486 | 65mm |
| Dellorto Spaco Carb | Main Jet Type | Idle Jet Type | Air Filter Size |
| PHBH 28mm and 30mm | 6413 | 1486 | 38mm |
| Mikuni Carb | Main Jet Type | Idle Jet Type | Air Filter Size |
| VM 20mm | 4/042 | 41mm use 39mm | |
| TM 24 mm | 4/042 | 44mm use 42mm | |
| TM 28 mm | 4/042 | 44mm use 42mm | |
| TMX 35 mm | 60mm |
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REPLACING YOUR STANDARD AIR FILTER BOX WITH A CLAMP ON AIR FILTER MAY |