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bid bore kit vs XR 400


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Are the Bill blue kits still available, I tried searching but only find discusions about them not a actual place to buy.

will they work ok with stock exhaust and carb or is it pointless to do it with out upgrading them also.

Its my wife bike, she never rides it, I ride a XR 400, but the low seat height and e start gets me thinking it would be nice, but the power is so low that it no fun to ride.

How does the KLX 351 compare power wise to a XR 400. Anybody own both.

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My buddy had a fully worked over Xr400. 440 kit etc. I have a fully worked over klx300 with a 340 big bore pumper header etc etc. Both bikes pretty much had the same custom work done. Head work port and polish etc.

I would take the KLX300 over the xr4 due to weight and I just really lovey bike. The suspension is tuned for me etc etc. if you have a newer 250 the weight is negated, I'm pretty sure they are heavier than an xr4. My buddies weighed 288 with a full tank of fuel ready to ride.

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