Weight savings

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10/23/2018 7:58 PM
Edited Date/Time: 10/23/2018 8:01 PM

So now that the Yamaha, Honda use the same frames between the 250 and 450 same forks/shocks with different springs, plastics, tank, swingarm...etc is that 10 lbs savings really all coming from the engine? The new RMZ250 has its own frame for the center port exhaust but for the most part the bikes are now essentially the same with a different engine. Is this leading to heavier 250s or lighter 450s? Also is the 10 pound difference really all in the engine or am I missing something. Seems like a lot of weight for essentially a bigger piston crank stronger tranny. The CRF250r even has dohc on the 250 and only a single cam on the 450 so those should be about the same weight but the 450 is exactly 10 lbs more. Seems like the 450s should weigh less no?

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10/23/2018 8:03 PM

I would say using the same frame and other parts equals a bigger profit margin for the companies.

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10/23/2018 8:06 PM

Is it really the same frame, or 2 different frames based on the same design?

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10/23/2018 8:13 PM
Edited Date/Time: 10/23/2018 8:15 PM

Same frame, plastics, swingarm, suspension besides springs on the Yamaha and Honda. Cant speak on the KTM or Kawi. The RMZ is different this year for the center port exhaust.

I wonder if this is making heavier 250s. It could be making lighter 450s though as well.

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10/23/2018 8:20 PM

drt410 wrote:

Same frame, plastics, swingarm, suspension besides springs on the Yamaha and Honda. Cant speak on the KTM or Kawi. The RMZ is different this year for the center port exhaust.

I wonder if this is making heavier 250s. It could be making lighter 450s though as well.

From a design standpoint i would think they make the lightest frame they can that does the job and goes from there. The motors are what is heavy

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10/23/2018 8:32 PM

We have a fc450 and a tc125 and they are so similar its crazy. Throttle, engine, cradle, air boot and back tire are the only things different.

Both are light bikes for the power they make

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