In the SI carburettor, the main jet is located in the jet block under the mixer tube and main air correction jet. It is responsible for making a certain amount of petrol available for premixing. With all tuning measures, no matter how small, it is necessary for the main jets to be raised, as they mainly impact on the middle and upper rev range. Their effect is linked very closely with the other components of the middle SI jet block and for comprehensive tuning, it is necessary for all of the components involved to be adjusted accordingly.
In recent times DELLORTO have regrettably been unable to deliver some of the more important jet sizes for their carburettors. The quality of certain after-market reproduction jets is unacceptable for us at SIP. For these reasons we have teamed up with the people at KOSO to have our own jets produced, complete with the SIP logo!
While the sizes of the DELLORTO jets can vary up to +/- 0.05mm from the given value, the SIP jets are much more precisely produced with their sizes only varying by +/- 0.005mm.
Those who've tuned carburettors and found the actual jet size does not correspond to the number engraved on the side, know what we're talking about. If 105 is written on it, then there'd better be 105 in it! Anything else is a cheap trick.
The size of the jets increases on the basis of one, two and three stages. The jets get increasingly richer. Simply attach the corresponding size to part no 4026. The jets from 142 upwards are redesigned specially under the SIP PERFORMANCE logo as DELL'ORTO is only able to supply jet up to 140.
The SI 105-128 and 130-140 jetting kits each contain 5 and/or 10 jets and are an ideal basic programme for any tuner.
Conclusion: Finest quality, perfect value for money and exact sizes are once more available.
TOP-TIP: For optimum tuning in the middle and upper rev range order a corresponding mixer tube (e.g. BE4 art no. 40406000) at the same time.
BONUS: All orders over £30 are placed on a next day delivery service. (If items are in stock)
ABROAD / OVERSEAS - SORRY, WE NO LONGER SHIP ABROAD SINCE BREXIT, apologies for the inconvenience.
When shopping with us our system automatically works out the weight and size of your cart (items you have added to your cart), gathering this information will decipher how much you pay on postage. You can evaluate your postage costs before checking out by visiting the cart page and clicking the "estimate shipping" button.
UK Shipping: Our UK postage prices start from £2.80 for small items and range up to £9.95 for larger items. Smaller items are generally shipped with Royal Mail, Larger items are shipped with DHL Parcel UK.
(TOP TIP: We recommended buying several items together because 1 shipment will be cheaper than multiple shipments.)
PLEASE NOTE: If you see "Fast Delivery" above the model number on the product page - this means the selected product can be shipped the same working day, for next day delivery to UK mainland destinations. If you purchase more than one item and other items are not fast delivery, your delivery may be delayed by another day or two. For an assured estimation of delivery times you can contact our team by clicking here.
Collection from our Store (FREE of charge): You can select to collect your items from our store, you might also have a preferred courier or delivery man to come and collect, or maybe you live locally and you like to come and visit our store personally. Please note: a notification of your order being ready for collection will be sent to your order email address before you come to visit, if you are unsure whether your order is ready for collection please call or email our team by clicking here.
Where to find us?
Our Address: Scooter Infinity, 92 Storforth Lane Trading Est, Hasland, Chesterfield, Derbyshire, S41 0SN
- Stock: FAST DELIVERY
- Model: PIJ108
- Weight: 0.10kg
- JAN: 121
- MPN: SIP: 40261080
NEXT DAY DELIVERY (MON-FRI):
via DHL Parcel UK - If purchases are over £30.
