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coulier

XR650R Yes/No on B53E Needle?

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I just put in new HRC exhaust tip/ and did some air box mods. Starts better, runs better. I have all the carb stuff Jets #68 / #175/ #B53E & Insl. boot thing. I just here so many "not running right" stories. Now I read on Dirtrodders.com on F.A.Q. for XR650R #14 "Some people have had bad luck with B53E needle, getting funky throttle results." I ride only in Michigan and just do not what to mess with the carb more than once. I guess my question is yes or no on B53E needle? Thanks so much for the imput!!

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I believe you'll find more people who've had success with the B53 than a negative outcome. I used it (in the 3rd clip) and it works mint. I had finicky results with the stock needle in the 4th clip. It was like nothing came together. The needle makes a big difference. Use it, if you don't like it, it's a fairly easy swap. Just loosen the insulator clamps and turn the carb, pop the top and your good to go.

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Coulier typically when you have negative responses from people with the B53 you've got someone at a high altitude using a richer tapered needle(B53) where it's not needed. The stock needle, in 4th clip, I think would be fine for anything over 3000' asl. From sea level to 3000' I would only use the B53 as it gave me a crisper throttle response and better mid to top end performance.

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