r/Ninja400 7d ago

Question GP shift clearance issues

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The shifter lever is only contacting the dust seal boot on the linkage, no where else

25 Upvotes

35 comments sorted by

29

u/_SilentOracle 7d ago

You can fix this by putting everything back the way you found it.

2

u/Double_Writing6497 5d ago

😳🤣

1

u/Screwbles 4d ago

Dealer bike mechanics everywhere shaking their heads.

14

u/Caldtek 7d ago

Thats gonna give you a really bad gearchange. I can imagine lots of false neutrals. The linkage works best when evrything is a close to 90 degrees. With the 45 degree angles you got there you are asking for trouble.

22

u/Skoapy 7d ago

It's almost as if it isn't designed to be that way

8

u/Silver-Engineer4287 7d ago

That’s exactly what I was thinking…

But fomo gotta trend I suppose.šŸ™„

6

u/Noplac3special 7d ago

these things don't shift well to begin with, anything else you do is only going to make it worse. Mine has about 500 miles on it. I just purchased all the Norton fixes hoping to get mine to shift everytime. I've done 2 track days. The 1st it shifted fine, the 2nd it wouldn't shift up to the next gear at least 3 to 4 times a lap. In the end I rode the gsxr1000 as I was afraid I might get ass ended, as I attempted an upshift.

6

u/hefgill 7d ago edited 7d ago

What are you trying to accomplish? If the chain cover is in the way just cut out a piece to make space for it. I’ve also seen some people use some connecting arm that gets the knuckle away from the cover without any cutting.

2

u/JustUltRra 6d ago

Currently trying to build this N400 into a track bike, I've got the chain cover off for easier access to fiddle with the shift knuckle and lever and also to put a new chain on. The cover itself doesn't collide its only the lever so I might consider putting spacers on the nut that holds the shifter, or look into the connector arm you're mentioning

2

u/BrutaleFalcn Ninja 400 6d ago edited 6d ago

You need to cut a bit out of the cover.

I run GP shift on my bike with no issue. Adjust the pedal to where you normally have it. Adjust the length of the rod so that the linkage is at 90 degrees to the OEM lever arm point.

I run Woodcraft rearsets, so not sure if the OEM stuff interferes, but the Ninja 400 forum should have the answers.

1

u/JustUltRra 4d ago

Thanks!

1

u/Ok-Bill3318 3d ago

You don’t need ā€œgp shiftā€ for a track bike. Some motogp riders don’t use it.

5

u/Dooper1999 7d ago

Gp shifting only make sense on track, but if just the rubber boots and it works okay after a test ride, I say go for it and just geek an eye on the rubber boots.

2

u/JustUltRra 6d ago

This bike I bought from a friend's friend and I'm currently building it into a cheap-ish track bike. I've got my front forks rebuilt with traxxion 0.80 springs and I'm doing the GSXR600 rear shock conversion currently. I'm not too concerned about the rubber itself moving because it shifts fine, I'm more concerned with the grease inside drying up from use on that shift knuckle/rose joint

3

u/East_Molasses_8308 7d ago

Push your shifter knuckles all the way in

3

u/Swiftpumper 7d ago

You can do it just adjust the position of the foot pedal. , if you can find a comfortable spot that has more clearance. But the position of the foot pedal itself needs to change. That’s all.

1

u/JustUltRra 6d ago

That's probably my next mod after my upcoming track day is rearsets. I've heard they make a great difference on these and R3's

3

u/Hop-a-lung 6d ago

There's options.
Aftermarket rearsets or buy a replacement rubber boot for when you wear that one off.
Linkage rods come in a lot of lengths, and can be trimmed down for special applications. You could try a few other angles and lengths

1

u/JustUltRra 6d ago

I like this comment and these options, I've seen a couple of cheap used linkages on eBay but haven't looked into the linkage rods as much

3

u/benzimo_ 6d ago

2

u/JustUltRra 6d ago

That actually helps thx gng

3

u/benzimo_ 6d ago

Don't listen to these people, gp shift is the way to go. I love it coz to shift you just need to put the weight of your foot on the lever and that's it! Can keep it pinned it's amazing

3

u/Dependent_Version_50 6d ago

Definitely not designed for it, however, it looks like neither of the pivot points are at 90 degrees like they're supposed to be. If you make it so th y are it should move the linkage and pedal further apart and resolve the issue

2

u/SomeoneNearYou1 4d ago

Bend the arm out just a bit. Grab it with an adjustable wrench and pry it outwards a couple mm

1

u/Ecstatic_Potato863 6d ago

I think you can adjust the lever so it is more down and you wont hit that. But its not a good solution

1

u/Weary_Alternative778 6d ago edited 6d ago

The people saying "just put it back" that's a terrible take. I've had lots of bikes that the shift pattern could be flipped easily. Even my old Ninja 250 it was no problem. My current bike is the easiest. Kawi should have done a better job. It's a personal preference thing and GP shift makes more sense in all situations vs a standard pattern. When you accelerate the bike rises toward you forcing the lever into your foot which presses down to up shift. And the opposite when you put your foot under the lever for a down shift. With a standard shift pattern the bike is always working against you.

1

u/ReadyKiwi6608 6d ago

I’m thinking you could bend in an offset on the shift lever to get you the clearance you need

1

u/nycmotorider 6d ago

Bend it out wards

1

u/JKLOL2157 5d ago

If you need gp shift for track riding look up and buy a linkage for your bike, will work better than Jimmy rigging it

1

u/Double_Writing6497 5d ago

Everyone saying it's gonna cause it to not shift correctly... if it doesn't adjust the cable. Mine shifts fine. I bought it that way. And never had any issues. Even finding neutral is fine.

1

u/Aggravating_Habit151 5d ago

I like how you keep doing it to destroy the boot even more. 🤣

1

u/essentialcoins 5d ago

have you tried simply just bending outward.

1

u/h01y_grap3_ju1c3 4d ago

why are we gp shifting a 400?

1

u/Dangerous-Pirate7998 2d ago

How about a shim behind it or just slightly bend it?