Twin Air 177772 70mm Long Air Filter Bolt

Uni nu-2245st multi-stage competition air fi lter (NU-2245ST)

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1981 Yz250 Air Filter Popular Q&A

Q: How to Clean a YZ250 Air Filter.
A: 1. Remove the retaining bolt on the plastic number plate near the backside of each side of the seat with a 10-mm socket and ratchet. Pull straight up on the bac... Read More »

Q: What air filter is better for a yamaha 2005 yz 250 to stroke, a t...
A: Personally, I would go with ... Read More »

Q: Was sold a yz250 03 with air filter not installed!
A: You could be sucking in grit and grime, and it'll pass through your carbs into your cylinder. You could have damaged your valve seating (is that a four-stroke? ... Read More »

Q: Yz 250 blowing fuel out the air filter side of carb?
A: It does sounds like a possible reed valve problem. I have seen reeds accually crack or chip on the corners. Check this out. If the reeds seem to be "ok" but the... Read More »

Q: Do you have to re-jet the carburetor when you change the spark pl...
A: No you only rejet carb if its needed. Like high alt. Like Denver CO. Or your looking for more power or you add a race exhaust. And they will suggest the jet. Read More »