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2011 CBR250R Torque Specs

1183 Views 8 Replies 3 Participants Last post by  Tamir
I recently got the bike second hand and it needs some fixing. I'm replacing the fuel tank and pump assembly as they were destroyed due to corrosion but I don't know the torque specs for the tank bolts. I don't have the service manual, only the owners and I didn't see it in there.
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Greetings & Salutations!

I usually go off this chart:

Well, it's been proven over and over again that expert pro mechanics will over-tighten small fasteners and under-tighten big bolts when going "by feel". Even after decades of experience they can't get better than +/-10%. We don't aim rockets "by eye", but rely on instruments with much, much more precision than our senses allow.

Beginners would learn "the feel" fastest with some sort of objective quantitative feedback. Clicker type wrenches aren't good for low-torque since they don't really click. They just kinda "clunk" and give and break gently. Newbies may miss this signal and continue to tighten. Personally I prefer to use beam-style wrenches or electronic torque meters with actual numbers for feedback.

These are actually better for high-torque applications too. Such as head-bolts, main bearing-caps and axle-nuts which has issue with "torque creep" due to extra friction at high torques. When you reach desired torque, it will actually relax a bit and you can continue to turn and torque won't increase for several degrees. Keep on turning gently and finally... the needle will nudge up tiny bit.. ah done! Clicker type wrenches would have clicked when target torque is first reached, but will end up under-tightening.
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