General FAQs

Q: Do you have these items in stock?
A: Yes. Whatever you can add to your shopping cart and complete an order with we have in stock.

Q: Will you ship to my location?
A: We ship worldwide anywhere the shipping providers we use will deliver to. A note to customers in the United Kingdom - all orders to be shipped to the UK must contain products valued at £135 or more. For more information please see our Terms.

Q: How soon will my order ship?
A: We ship the same (or rarely, next) business day if your order is placed before 13:30 Central Time.

Q: Are the items you sell OEM or aftermarket?
A: The majority of the items we sell are manufactured by the OEM (mainly Mikuni and Keihin). As a convention, we explicitly name the manufacturers of OEM items on their respective product pages.

Technical FAQs

Q: I am having trouble installing my new BST38 or BST40 slide guide. What should I do?
A: Please follow the instructions at BST38 & BST40 Slide Guide Installation.

Q: Where are the spring, washer and o-ring that are supposed to be included with the extended pilot fuel screw set with a part number starting with "CRZ-SCR"?
A: They can be found inside the sheath that covers the tip of the screw.

Q: The throttle slide binds in my new slide guide. Is the slide guide defective?
A: No. Please see article BST33 & BST36 Slide Guide Installation or BST38 & BST40 Slide Guide Installation.

Q: Does the jet needle spacer install under or over the clip?
A: All genuine Mikuni jet needles are intended to have the white (in some cases grey) plastic spacer installed under the clip (this is not to be confused with the slide spring spacer, which installs between the clip and slide spring).

Q: I am installing a 6F19 jet needle, part number 13383-32E00. Should I install the stock white plastic jet needle spacer, part number 13387-07D00?
A: Yes.

Q: I am installing a 6F19 jet needle, part number 13383-32E00. Should I install an aftermarket d-shaped spacer or modify the stock white plastic jet needle spacer, part number 13387-07D00?
A: No.

Q: The white plastic jet needle spacer 13387-07D00 won't slide up against the clip. Did I receive the incorrect part?
A: No. The spacer is supposed to fit the needle tightly. Set the blunt end of the needle down on a solid surface. Use both thumbs to force the spacer down until it bottoms against the clip.