2T vs 4T weights

[YamaDubR]

How can this be? Both listed as "dry weight". Both have identical chassis', suspension, running gear.
300 SE-R - 105kg
300 SEF-R - 102kg

Who would have thought that 4T technology could have come so far that an FI system (pump & throttle body) & over-head (valves, cams, chain, etc) would be 3kg lighter than an expansion exhaust & carby?

[Gypsy501]

A Beta 2018 250rr 2stroke 104kg

A ktm 2018 250excf 4stroke 103kg

Both dry weights

[RMJay84]

saw a 2012 sherco 300f on scales, it was 108kg with an empty tank, at that time sherco were also claiming 102kg so I'd say 102 i still a bit of an exaggeration...

[wazza]

Weights measured at the brochure rarely correspond to weights measured on the scales.

[gasgasman280]

Im with Rmjay. If your silly enough to believe any of the manufacturers claimed weights then your need your head read

You can't beat a seat of the pants ride to get a feel for a bike weight and its weight distribution.
The last sherco 300 4 stroke that I slung a leg over weighed a whole bunch more than 102 and it felt a bit top heavy too.

[devans]

There's always debate over claimed vs actual weights. All I know is my 300 SEF-R feels light when riding and is pretty easy to pick up. It seriously feels no heavier than my old 2000 model KDX 200, which also had a claimed weight of 102kg.

[Nutty]

Originally Posted by YamaDubR

How can this be? Both listed as "dry weight". Both have identical chassis', suspension, running gear.
300 SE-R - 105kg
300 SEF-R - 102kg

Who would have thought that 4T technology could have come so far that an FI system (pump & throttle body) & over-head (valves, cams, chain, etc) would be 3kg lighter than an expansion exhaust & carby?

I questioned the designer of the 300 2T Shercos (Tomas Tiessier sp? ) about these weights. The original design 300 2T used the 250/300i gearbox but they were proving not up to the torque of the 2T. The second protos (and production bikes) use the 450s primary/clutch/gearbox, hence the extra weight.

That is straight from the bloke who designed them FWIW.

[BIGBADAL]

I would have thought the motor that has way more grunt be heavier anyway .

[hairyone]

In my admittedly quite limited: Maybe-myopic & likely-naive, narrow minded perspective:
My 4t's were harder on my drivetrain; since it's double the power & torque 1/2 as often.

I've been sensualising it as double slap & whack rather than a constant tickle & trickle.

In my experience: My 4t's chewed my tyres & sprockets & my output shaft-spline too.
My 2t's didn't do that to me & I was top-gear mono's & full-lock sideways on both-all.

Edit: This post I've recently written in the Yamaha forum/thread maybe relevant also.

[Tom68]

Originally Posted by YamaDubR

How can this be? Both listed as "dry weight". Both have identical chassis', suspension, running gear.
300 SE-R - 105kg
300 SEF-R - 102kg

Who would have thought that 4T technology could have come so far that an FI system (pump & throttle body) & over-head (valves, cams, chain, etc) would be 3kg lighter than an expansion exhaust & carby?

Good job with the 4 stroke weight, but we are comparing an open class bike to a no class bike aren't we ?

EDIT....A bit of googling tells me in the WEC we are comparing E3 to E2, 250 2 stroke same weight as the 300 but.

109kg for the 450, good job there to.



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