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J&P Cycles® Slotted Crankcase Breather Assembly

10 Reviews

J&P Cycles® Slotted Crankcase Breather Assembly
Product may vary from photo(s).


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10 Reviews

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J&P Part: 4300400

Description for J&P Cycles® Slotted Crankcase Breather Assembly 

J&P Cycles® Slotted Crankcase Breather Assembly

• One piece filter molded to a light weight chrome slotted cover

• Includes a chrome plated zinc die cast mounting base

• 5/16″ inlet diameter accepts standard 3/8″ breather hose

• Ideal for pre-93 Big Twin and pre-91 Sportster models

• Also works well for custom builds when used in conjunction with breather kit such as 4000305 for Big Twin models or 4000330 for Sportster models

Product Specs

Exact Rating: 4.200000

Finish: Chrome

Length: 1-1/2″

Material: Chrome

Sold in Units: Each

Fitment for J&P Cycles® Slotted Crankcase Breather Assembly 

Customer Reviews for J&P Cycles® Slotted Crankcase Breather Assembly 

Overall Rating:
4/5 based on 10 ratings

4 by

In the middle of a rebuild but this should work much better than the old one

5 by

Works Great! Thank you JP Cycles, I thought I ordered the wrong part, your customer service rep was amazing with checking into the part and making sure it was a correct fit for my bike, and of course it was! Thanks for all your knowledge and excellent customer service.

5 by


5 by


5 by

Absolutely beautiful! Thanks.

3 by

looks good, works

5 by

well made and priced

4 by

It was what I expected

3 by

Works good by the hose does not connect tightly so the filter rattles a bit.

3 by

Nice billet mounting bracket. I wasn't really fond of the PLASTIC cover over the breather element. I would have paid extra $$ if it would have been made out of aluminum instead of plastic. Harley's are NOT made of plastic.

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