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XR80 Can I get more throttle response?

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My son is getting better and wants to whip some turns. I cant afford a new bike for him yet so is there any way I can get more power out of his 2003 XR80? I have added a BBR pipe already which made a big difference from stock but it needs more.

(Ride um until the wheels fall off!)

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Opening up the airbox helps on the intake, like the pipe did on the exhaust. An XR100 carb makes for a nice boost. Beyond that, you have to look inside the engine. But, do the stuff on the outside of the engine first.

I have an XR100 carb, PM me if you are interested.

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A wiseco piston with slightly higher compression should make for some gain on the low end and the piston is lighter than stock helping the throttle responce.

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A rev box like the one from BBR (Usually on Ebay for $50 or so) Should change the ignition curve and rev limiter (The XR80 is tamed down for beginners). This with the Air Box / Jeting and Pipe should help bring the XR80 to life. For a littel more response you could have a machine shop shave a little weight off the flywheel. This will assist it in reving quicker and adding some SNAP. AND all for a mimimum cost...

Is the bike jetted correctly? Jetting a bike correctly requires a good bit of trial and error. Jet it until too rich and then back off a step. The Jetting kits and Pipe MFG recomendations are a general good place to start. Getting it spot on will wake the bike up. Needle for 1/4 throttle - 3/4 throttle, Main jet for top end.

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Shave the flywheel. The rev box is the same one on the 100, which has no limiter. I've tried back to back to after market ones and felt no difference. I haven't dynoed them back to back, but on the track I felt no difference. Mainly, the xr80 is slow . . . really slow. If you throw a bunch of money at it, it will still be fairly slow. It's worth, selling the motor and getting a 100 motor and build that. You should be able to do that with minimal dollar loss. I saw a clean xr100 motor go for $355 on ebay and usually a clean xr80 motor will go for around $250-300. You'll need a xr100 manifold and airboot, which can be had on ebay pretty cheap.

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