More power for GB400 needed

[Brutus]

Whats a dremel ? and what to do with such a thing?
Please excuse ignorance.

[avgas]

Dremel - drill grinder multitool thing. Similar to a dentist drill type setup with little drill, grind, engraving things.
I was actually thing more to clean up the inlets but you could do the jets aswell....if you were super careful.

[mark247]

Is it possible to get an oversized piston for the GB400?

[avgas]

Is it possible to get an oversized piston for the GB400?

Yep - how goods ya japanese. There is a guy there that makes anything and everything for the 400. I heard he was going out of buissness though. If i come accross his site again i will bump it on here. He made the 425 kit that was in my bike (according to the previous owner)

[mark247]

Yep - how goods ya japanese. There is a guy there that makes anything and everything for the 400. I heard he was going out of buissness though. If i come accross his site again i will bump it on here. He made the 425 kit that was in my bike (according to the previous owner)

Man i hope he is still in business!

[avgas]

Havent found it yet - but this looks nice.
Just like that old triumph triple i think.

PRETTY GB

[mark247]

Havent found it yet - but this looks nice.
Just like that old triumph triple i think.

PRETTY GB

Far out that thing is anything but standard, rear disc brakes, pegs further back...

[avgas]

I found this a good resource of information, when i was modding mine:
http://www.amy.hi-ho.ne.jp/tachi/eng.../tune_eng.html

[moT]

You could gut the exhaust drill holes in the airbox drill out the jet probably the easiest and least expencive way for a few more hp then if u wanna spend more $$$ think abt lumpy cams bore it out but really i would get a new bike for 2000 u cld get a bike faster than a gb400

[FROSTY:Me]

um looks like noones suggested the easiest solution--ripout the 400 engine and bung in a 500 --never done it but probably doable

[mark247]

um looks like noones suggested the easiest solution--ripout the 400 engine and bung in a 500 --never done it but probably doable

Not many of those engines around...

[okeh]

Rip out the gb400 engine and dump in a SR20DET running 80 psi boost.

[mark247]

Rip out the gb400 engine and dump in a SR20DET running 80 psi boost.

Are you some Nissan car fag?

[knuckleduster_13]

hey buddy would like to have a copy of your owners manual in pdf i have a gb400
i joined this site theres a lot of us gb owners im from manila by the way
cheers

[bob181]

Hey I spent alot of $$$ fitting a big bore kit to mine along with cam, exhaust, shocks & wider rims. That bike was the just the best in this twistes, leave it in third and roll into corners then roll the throttle on out. Nice! Have just sold it to pay for a Ducati 600SS I brought, way different beast all togeather. I would look out for a XL600 motor, would bolt straight in and the wiring is the same. Probably need the XL CDI tho.