GSxRD400

[EdE]

It had to be done..

RD400 engine into GS500 Chassis.
I've been doing a build write up on the conversion on my website at: http://erlenbachracing.net/GSXRD400.htm

[Big Rich]

Oh my..........that thing is going to scream.

I had the chance to ride a hopped up rd350 about a month ago - overall the bike was.......um......barbaric. But the motor was ready to kick you in the throat.

[seamax]

  Wow that thing looks puny in the GS frame. The 2 stroke is going to scream unlike any GS and kudos with the kick start. 

[cbrfxr67]

engine swapgasm,.....

[steezin_and_wheezin]

^^ haha my thoughts exactly!

Awesome build, will be following this thread closely

[NortwestRider]

I raced RD400's thru the 80's and always wished they handled better,you just answered my wish !!.


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[catch2otwo]

 we will be comparing notes this winter.  I was considering warmed over banshee motor instead of rd.  Looking forward to your progress.

[steezin_and_wheezin]

I crave more 2 strokin' gs updates!!!

[surplus 6]

  updates??

[EdE]

Hi Guys, The economy has made this build a lot harder than it's had to be but There's been a lot of progress. I've got my fully rebuilt, nicely massaged RD400 engine bolted in, I just wiring in the ignition and have spark, I need to finish rebuilding the carbs, add a chain, buy a few more minor parts and mount the pipes and she'll be a rollin and a runnin.  Ed


I've got an add in the wanted section for a seat and a couple other parts "preferably" local if anyone has any.

[BockinBboy]

That exhaust looks so... 'cute'   

Seriously though, awesome build!  I really hope to see a video of her running some day.

- Bboy

[bombsquad83]

subbed... I don't want to miss the completion of this project!

[steezin_and_wheezin]

It's... Beautiful!

Combining my two current loves of moto, the gs(of course) and a 2 stroker. Those water formed pipe are a thing of beauty by themselves!! Love the sound of a well tuned rd400

Can't wait to see more progress

[Big Rich]

Glad to see you're still at it Ed. I was just wondering about this project, actually.

[jacob92icu]

Hahaha look at that tiny little exhaust. Cant wait to see it completed.

[Wagoneer]

Why not stick with the 500 theme and the Suzuki family and go with the engine from a T500? It's got ~8 more bhp too.

Just already had that engine or something?

[EdE]

Why not stick with the 500 theme and the Suzuki family and go with the engine from a T500? It's got ~8 more bhp too.

Just already had that engine or something?

I'm an old RD400 guy   http://www.erlenbachracing.net

[Big Rich]

Just want to add (Ed, please correct me if I'm wrong): a stock T500 motor might put out a couple more horses than a stock RD motor......but RD motors have a huge aftermarket following. I believe the Banshee motors are a drop in (and liquid cooled) replacement for an RD motor?

[EdE]

Hi Rich, The RD's, especially the 400's (my favorite) are just a sweetheart of a motor. They rev higher, are more dependable, and have a broader powerband (reed valve induction), than the T500's and you can pull 70-75 rwhp out of one in roadracing trim. Not to mention parts availability is a lot better and a better level of performance parts. The RD's even benefit from some of the RZ/Banshee performance parts.
The RZ and Banshee engines aren't a drop in replacement because the mounts are a little different, but the dimensions of the engines are so similar the engines are often swapped one way or the other. Ed

[Big Rich]

Thanks Ed! 

For some odd reason I think the transmission is different / better in the RD400 motor in comparison to the RD350 too.... I have some friends that are into the old RD motors - that's the only reason I know anything about them. And they sound great at wot.

Either way, great project you have here. Hope you get it up and running 100% soon.