Thundercat / FZR600 gearbox

Forum rules
Please can you post items for sale or wanted in the correct For Sale section. Items / bikes for sale here will be removed without warning. Reasons for this are in the FAQ. Thanks
Post Reply
Graveltrap
Settled in member
Reactions:
Posts: 10
Joined: Wed Sep 13, 2017 6:06 pm
Thundercat / FZR600 gearbox

Post by Graveltrap » Thu Jul 26, 2018 11:00 pm

As I continue to develop/test/crash my 3TJ/Thundercat/Aprilia hybrid the inevitable has happened and it has shat second gear. Fitting another motor could easily end up in the same place after a couple of track days but swapping the gearbox looks like a family sized pain in the backside, not to mention expensive so I want to make sure the whole gearbox is good once its all finished. I can get a mint late model FZR 600 gearbox but don't know if this is the same or at least a suitable swap for the Thundercat.

Can anyone advise?

Also apologies for a 600 question on a 400 forum!

Evilchicken0
Site Supporter
Site Supporter
Reactions:
Posts: 9490
Joined: Tue Apr 29, 2008 8:59 pm
Bike owned: Bimota SB6 Yamaha FZR 3TJ x2
Location: Lundin Taan
Re: Thundercat / FZR600 gearbox

Post by Evilchicken0 » Fri Jul 27, 2018 6:10 pm

Not sure about the FZR / T'Cat changes.

To be honest why not get a cog made up by Nova that way it will stronger than the standard. Stripping the motor means everything off (unless you didn't put in the 2 bolts only accessed when the barrels are taken off), it's a straightforward job though.

kagari15
Settled in member
Reactions:
Posts: 41
Joined: Sun Jun 14, 2020 4:20 pm
Bike owned: FZR400 3EN1
Contact:
Re: Thundercat / FZR600 gearbox

Post by kagari15 » Sun Jul 12, 2020 8:38 am

The axles and their bearings for the 4TV (Thundercat) are different than the 400s, ie 1WG, 2TK. If you have measurements of the sizes of the axle, bearings and such, confirm it against the 400/600 bottom end. I heard the Thundercat trans has been beefed up to fix the common issue with the 600 on a 400 gearbox. Don't know the specifics on dimensions, me.


Post Reply