Rev match sequence?

[Deleted member 50930]

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I don't know a single rider that looks at their rpm to shift gears.

Doh

 

[jemlinus]

As R3 described a properly done rev matched downshift “uses” virtually no clutch at all, assuming you’re talking the consumable portion, IE the friction material.

Every start from a standing stop uses more friction material than tens or hundreds of thousands of properly matched downshifts in which the plates are basically doing nothing except opening and closing at the virtually the exact same speeds due to the revolutions matching. That seems to be the bit you're not understanding.





What if I told you that on Class 8 trucks you shift all day long both you and down without a clutch? And the transmissions are unsynchronized, the same as a motorcycle.

And what if I told you that unless you match the RPM’s absolutely perfectly on both up and downsides that the transmission simply won’t accept the gear. It physically won’t go in if you don’t rev match the transmission to the engine on both up and downshifts.

And what if I told you that a skilled driver can go up and down through hundreds or thousands of shifts every work day, shifting like butter every time because of rev matching?

Now you’re suggesting that even a pro racer on a MC isn’t capable of doing the same?

BTW, go RE-read my response with regards to traction issues generated by not rev matching your downshifting. Question: Do you use your front brake when decelerating hard, or just the rear?

We were talking about clutch wear when we use the clutch. If you use it, it will wear.

Stop arguing about whether they wear or not. They do when you use them.

 

[r3r3r3]

so do tires when you ride more than 5km/h. You might want to look into a bicycle if you're so worried about part wear.

something something old dogs new tricks.

 

[PrivatePilot]

You never answered my question, Jem....

But whatever, it's evident you're decided you're right regardless of any facts presented to you.

 

[blackcamaro]

We were talking about clutch wear when we use the clutch. If you use it, it will wear.

Stop arguing about whether they wear or not. They do when you use them.

Motorcycle clutches are pretty tough. Any amount of wear from a downshift if it was measurable would be close to non existent.

It’s not like a noob slipping the clutch for half a block at 10,000rpm.

 

[Slono]

Rev matching while downshifting is usually required. I find going from 6 -> 5 doesn’t feel like it needs any sort of throttle input. The other gears definitely need throttle input if you’re downshifting from high speeds like when you’re exiting the freeway.

I read all the comments here and I’m surprised at how a few guys who seem knowledgeable in motor vehicle mechanics sound like they’ve never ridden a motorcycle made within the past 30 years.

The bottom line is of course you need SOME throttle input when downshifting. Just ride 99% of the motorcycles on the street and you can feel what the bike needs based on its response.

Edit: to answer OP’s question

- clutch in
- downshift
- throttle input
- clutch out

I don’t think “throttle off” is necessary.

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