Brake fade after parked for 4 days

Call Suzuki in Brea, California. Give him the dealers name and your Vin number and the Bike information they need to buy your master cylinder. Free of charge.
 
So I shouldn't wait for Suzuki and see if they will cover it? It was under warranty when this whole nightmare began.

I don't know, that's your call.
I planned to buy a new Gen3, but changed my mind a long time ago, after I saw how many of them were plauged with problems...as I would probably be arrested before Suzuki did anything.
I honestly hate Suzuki as a company now, after seeing how it took them over a year and a half to even address failing brakes...and on multiple model years.
Sadly they have treated you and others poorly, by not just replacing the master cylinder, because it's not within their vin# range.
That part is pennies, vs someone being hurt or killed as a result.
I live in Va, and after the dealer fails to fix a problem 3 times, the manufacturer has to buy it back at full price under the lemon law...and I'm sure failing brakes would fall under that.
The dealer is supposed to fit a new front brake mc under the recall, so you can either fight for that, or buy one, or better yet an aftermarket mc.
It all depends on where you are personally with the bike and the situation.
I wish you well in getting it resolved one way or the other.
I see too much post-covid junk from all manufacturers to make me ever want to buy a new bike or vehicle ever again.
I will stick with older and used, and modify them to my needs.
Let us know how things turn out for you.
 
I don't know, that's your call.
I planned to buy a new Gen3, but changed my mind a long time ago, after I saw how many of them were plauged with problems...as I would probably be arrested before Suzuki did anything.
I honestly hate Suzuki as a company now, after seeing how it took them over a year and a half to even address failing brakes...and on multiple model years.
Sadly they have treated you and others poorly, by not just replacing the master cylinder, because it's not within their vin# range.
That part is pennies, vs someone being hurt or killed as a result.
I live in Va, and after the dealer fails to fix a problem 3 times, the manufacturer has to buy it back at full price under the lemon law...and I'm sure failing brakes would fall under that.
The dealer is supposed to fit a new front brake mc under the recall, so you can either fight for that, or buy one, or better yet an aftermarket mc.
It all depends on where you are personally with the bike and the situation.
I wish you well in getting it resolved one way or the other.
I see too much post-covid junk from all manufacturers to make me ever want to buy a new bike or vehicle ever again.
I will stick with older and used, and modify them to my needs.
Let us know how things turn out for you.
Wouldn't it be great if life was a movie and you could ride a troublesome bike like that into the dealership showroom floor, stuff a rag into the gas tank, light it and walk away.....

Suzuki should have issued a TSB right away and did the right thing....
 
Wouldn't it be great if life was a movie and you could ride a troublesome bike like that into the dealership showroom floor, stuff a rag into the gas tank, light it and walk away.....

Suzuki should have issued a TSB right away and did the right thing....

My life has been very Forest Gumpish in many ways, and as said...I would've been arrested by now...and I wasn't joking
lol
 
My 2023 has been doing this for over two months now. The bike has 4,100 miles on it. The "dealer" I bought it from has been jerking me around. They had my bike for three weeks and tried telling me all it needed was bled and Suzuki wouldn't cover it because it's a maintenance item. NOT at less than one year old and 4,000 miles IT'S NOT. So after that didn't fix it and the same problem came up again I was far less cordial with the service manager. They came and picked up my bike, bled the brakes again and called it good after a week of holding my bike hostage. Well guess what. Four days after they supposedly fixed it the second time, I went to ride to work this monday morning and the lever goes straight to the grip with no brake pressure. Told the service manager about it yesterday morning and all I got back was I'll have to contact Suzuki. My bike is outside of the VIN range of the recall but it's doing the exact same thing.
You need to get the recall work performed and even though I’m old and knew to immediately pump the lever to get brakes; they need to understand that if there’s an accident a lawyer will have a field day with them and Suzuki.
 
UPDATE::
Suzuki USA is releasing a revised TSB on the front brake master cylinder on the 25th of October this year (2024) and they will be replacing mine under warranty. It SUCKS I had to do this song and dance over the last four months but this should make it easier for anyone else who experiences this problem with the front bakes but is outside of the RECALL VIN range. It's there roundabout way to cover the repair but not have to "fix" every Gen Busa with the old part number master cylinder. So once that is released the dealer is going to order the part and FINALLY fix my bike. I am glad they decided to do the right thing. This definitely improved my opinion of Suzuki as a company.
 
"improved"? that in 2 weeks they'll finally release an ok to fix failing brakes on all bikes that have the problem...vs only the ones that they thought had failing brakes.
It's only a cover their own azz move...Suzuki Still sucks as a company now, sad but true.
They really dropped the ball on the Gen3.
 
"improved"? that in 2 weeks they'll finally release an ok to fix failing brakes on all bikes that have the problem...vs only the ones that they thought had failing brakes.
It's only a cover their own azz move...Suzuki Still sucks as a company now, sad but true.
They really dropped the ball on the Gen3.
The bar was very low to begin with lol
 
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UPDATE::
Suzuki USA is releasing a revised TSB on the front brake master cylinder on the 25th of October this year (2024) and they will be replacing mine under warranty. It SUCKS I had to do this song and dance over the last four months but this should make it easier for anyone else who experiences this problem with the front bakes but is outside of the RECALL VIN range. It's there roundabout way to cover the repair but not have to "fix" every Gen Busa with the old part number master cylinder. So once that is released the dealer is going to order the part and FINALLY fix my bike. I am glad they decided to do the right thing. This definitely improved my opinion of Suzuki as a company.
Do you have the paperwork in PDF , hope you will share .
 
Can someone explain this to me? The cover is on top. It needs to be air sealed or otherwise air gets in the line? If so how would that happen? I can understand long-term degradation from air, but how does the catastrophic brake failure happen?
 
Can someone explain this to me? The cover is on top. It needs to be air sealed or otherwise air gets in the line? If so how would that happen? I can understand long-term degradation from air, but how does the catastrophic brake failure happen?

There is still a small amount of air above the fluid level in the resivor, and the machining error is supposedly in the inner return port of the master cylinder, which is apparently filling with air instead of fluid, and the air will compress, where as the fluid cannot.
So you get several lever pulls that are pumping fluid back into the air filled port, and pushing out the air in the process, which is why it takes several pulls to build brake pressure again.
 
And with a properly functioning brake system, it is sealed only to keep fluid from spilling out, and the hydraulic fluid from absorbing moisture, which has air in it.
Otherwise, air cannot enter the system unless the fluid drops below the level of the pick-up port hole.
But, with the Gen3's flawed return port(which allows fluid to return to the resivor), it's apparently picking up air there.
 
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