Starter Clutch Mod

[Silver954]

This thread is for the general discussion of the 3rd Generation Hayabusa Starter Clutch Mod. Please add to the discussion here.

 

[Mythos]

I'l be the first as a soon to be Gen3 owner. What is a starter clutch and why would you want to mod it?

 

[Silver954]

It's a clutch pack between the electric starter and one-way bearing for the crank. Limits the amount of torque that can be applied to start the bike. Issue is when the bike is hot/vapor locked, clutch starts slipping. Causes a loud squeal and no start.
Suzuki recommends cracking the throthle 1/8 turn when starting hot to prevent the issue. Pashnit reported putting a new one and cracking the throttle 1/8 turn and not having the issue for 30k miles. So it's possible to go that route too.

I experienced first slip/no start at 1500miles, low on gas and idled for a bit while opening gates. 10min later wouldn't start. Vapor lock was definetly possible, cracking the throttle helped. But I'd rather have it start reliably without the additional procedures.

 

[Mythos]

You know, with these modern bikes and the electronic nannies that need to be reversed, it makes all the more sense to keep them forever once they're fixed.

 

[Sl@Sh]

There is another mod option, our local hayabusa community member "repacked" clutch plates with kevlar/carbon composite and starting problem went away as new clutch plates has more friction.

PS to extend starter clutch plates lifetime always start the bike with clutch engaged as it was mandatory to previous suzuki bikes dont know why this is not on new hayabusa. This will reduce load on the starter and will extend lifetime.

 

[Hayabusa Wannabe]

PS to extend starter clutch plates lifetime always start the bike with clutch engaged as it was mandatory to previous suzuki bikes dont know why this is not on new hayabusa. This will reduce load on the starter and will extend lifetime.

Do you mean "disengaged"? Are you saying the bike starts in neutral without pulling the clutch lever?

 

[Sl@Sh]

Do you mean "disengaged"? Are you saying the bike starts in neutral without pulling the clutch lever?

To be more clear clutch lever engaged, older suzukis wont start if you wont engage clutch lever, hayabusa gen3 can be started without touching clutch lever.

 

[Mythos]

PS to extend starter clutch plates lifetime always start the bike with clutch engaged as it was mandatory to previous suzuki bikes dont know why this is not on new hayabusa. This will reduce load on the starter and will extend lifetime.

I was going to say, my Gen2 requires the clutch lever to be pulled all the way in for the starter motor to work, even in Neutral.

PS to extend starter clutch plates lifetime always start the bike with clutch engaged as it was mandatory to previous suzuki bikes dont know why this is not on new hayabusa. This will reduce load on the starter and will extend lifetime.

Hi Sl@sh, I'm sure you are mistakenly using the word "engaged" instead of disengaged. If the clutch is engaged, the transfer of power from the engine to the gear box is complete. The clutch plates are engaged, they are gripping. Disengaged means the clutch plates are separated and the clutch is not gripping at all, engine load is taken off of the transmission.

....although you are probably referring to the clutch lever. If the clutch lever is pulled, the lever is engaged but this disengages the clutch. I've found this contradiction confusing in the past. To disengage the clutch, you pull the clutch lever; to engage the clutch you release the clutch lever.

I'm sure I'm correct about the common uses of the words, disengage and engage as they pertain to engine clutches. ....although it is exactly the opposite concept for using the clutch lever. I use the words "pull" and "release" when referring to the clutch lever to avoid confusion.

Just thought I'd offer the suggestion. I enjoy your posts and I enjoy the accent I hear when I read them.

 

[Sl@Sh]

I was going to say, my Gen2 requires the clutch lever to be pulled all the way in for the starter motor to work, even in Neutral.


Hi Sl@sh, I'm sure you are mistakenly using the word "engaged" instead of disengaged. If the clutch is engaged, the transfer of power from the engine to the gear box is complete. The clutch plates are engaged, they are gripping. Disengaged means the clutch plates are separated and the clutch is not gripping at all, engine load is taken off of the transmission.

....although you are probably referring to the clutch lever. If the clutch lever is pulled, the lever is engaged but this disengages the clutch. I've found this contradiction confusing in the past. To disengage the clutch, you pull the clutch lever; to engage the clutch you release the clutch lever.

I'm sure I'm correct about the common uses of the words, disengage and engage as they pertain to engine clutches. ....although it is exactly the opposite concept for using the clutch lever. I use the words "pull" and "release" when referring to the clutch lever to avoid confusion.

Just thought I'd offer the suggestion. I enjoy your posts and I enjoy the accent I hear when I read them.

Hi, thank you for such detailed explanation, English is not my 1st language so sorry if sometimes it can be hard to understand. I had in mind clutch lever "pull"

 

[Mythos]

Hi, thank you for such detailed explanation, English is not my 1st language so sorry if sometimes it can be hard to understand. I had in mind clutch lever "pull"

Yes, I read what you meant in your words perfectly, just noticed a highly understandable confusion with the common uses of words in english. English is my native tongue and even I have mistakenly used these words incorrectly. I am very glad for your valuable posts and I'm glad you don't mind the correction in the subtleties of grammar. Again, it's confusing even to native English speakers. Thank you for speaking to us in english. Most of us don't even speak anything else at all.