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crash279

Another Carb question

5 posts in this topic

I have been jetting and tinkering with the carb on my WR426. Through this forum I have been able to narrow my ailment to the TPS. I still have a hint of a hiccup, but it is a lot better than it was. My question is if I update the carb to a newer style FCR will the throttle position sensor be any better?

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If your TPS is out of adjustment and you cannot get it adjusted in range, you need to replace the TPS. However, the new style FCRs are a better carb and easier to work on and tune. You want to be careful buying a used carb as it may be worse that what you already have. There is a reason the carb is being sold, often that it is from a worn out bike.

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I do have more experience with the new FCR carbs, but there doesn't seem to be that much difference to me. The bike is running waaaay better and I'm debating on whether a newer carb is even worth it. The carb that I have been looking at buying is from a forum member, so I will trust that it is in good shape. Other than being a little more refined in design, what else would I gain by swapping the carbs?

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Other than being a little more refined in design, what else would I gain by swapping the carbs?

Remote hotstart.

Your 2001 carb will have the hotstart plunger mounted on the side of the carb, next to the choke.

A 2003 > carb has the hotstart lever mounted remotely on the clutch perch.

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The older slants style carbs have a more difficult to adjust AP system. They are also more prone to slide cracking.

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