XR400 Four - Skunkworks Special

Pezz_gs · 08-19-2009, 08:04 PM

Yep that’s right I’m building me a little 4 cylinder adventure bike.

I am organising a fundraiser for the Down Syndrome Association of NSW called:

Scrapheap Adventure Ride 2010

Raising Money for Down Syndrome Association of NSW

www.dsansw.org.au

Ride to: Wanaaring

When: Easter Saturday - April 3, 2010

Rules:
Have to buy a Bike for less than $1000.00.
Can be any road registered motorcycle.
You are allowed to spend additional sums on the bike to make it run and roadworthy, all machines participating must be registered.
It costs $100.00 to enter paid directly to DSANSW.
You can raise additional funds through sponsorship of your ride.
(Pay cents per Kilometer)

Above is the donor bike.

A mate, Shane, give me this little beauty for $0.00. Thanks Buddy

I want to splice on a XR front end, wheel and swing arm rear wheel.
Still wondering what fuel tank, seat and guards to run. Need to build it as cheap as possible. I will not be butchering this bike as will be able to return it to CB400 Four at the end if I wanted too.

When I first looked at it, it is very small. And quite light. I will keep posting as I progress.

I had an old KTM muffer I had laying around in the garage

and some old KTM Tank Seat and Guard. Bars will be a bit hard to turn.

Looks too modern and losing that classic look. Let try a R80G/S Single seat??

There will be lots of trying and looking and binning.

I have a set of alloy Krauser pannier and topbox frames somewhere in the BMW parts in the shed and will probably use them with plastic gerrycan panniers. Plus a home made topbox.

OldDog is building up and old TS250 which is below and tHEtREV is coming with his RZ350 Dirtbike.

So if anyone has some old XR bits I would greatly appreciate your assistance

carmima · 08-19-2009, 08:23 PM

this'll be worth watching - good on ya pezz

viz · 08-19-2009, 09:16 PM

Ummm would my FJ qualify? Got it for free, though had to spend a quid to get it back up to scratch...

viz

Pezz_gs · 08-19-2009, 10:26 PM

Quote:

Originally Posted by viz

Ummm would my FJ qualify? Got it for free, though had to spend a quid to get it back up to scratch...

viz

viz,

The idea is to get as many old bikes out of shed and back on the road for a bit of fun and a good cause.
So YES the FJ would qualify, would like to see what you do with it. do they make a 160mm wide knobbie

Pezz_gs · 08-20-2009, 01:05 AM

Been doing some measuring around the rear end.

Anyone have a XR who can measure the swing arm for me?

The width of the swing arm at the pivot is 200mm.

The 400's swingarm length is around 450mm, how long is an XR swing arm?

Noticed the Redline on this bike is 10,000rpm

carmima · 08-20-2009, 01:07 AM

Quote:

Originally Posted by Pezz_gs

Noticed the Redline on this bike is 10,000rpm

sounds like it'll make a great hill climber

Matt · 08-20-2009, 01:13 AM

This is going to get interesting.

I might just start looking around for a banger.

Pezz_gs · 08-20-2009, 01:29 AM

Something similar out of Italy, about the 18 second mark

redneckdan · 08-20-2009, 06:35 AM

Pezz, man, yer not helping..... I want so badly to stuff a 500cc ninja mill into my KLR650....but my wife would kill me. I do have an XR250 frame sans engine....think a ninja 500 engine would make an old XR scoot?

OldDog · 08-20-2009, 07:28 AM

Perry, have you been over-medicating again?

Pezz_gs · 08-20-2009, 06:53 PM

Na mate but you should smell the stale fuel in the tank . . .

Some intersting CB400 Four Facts apart from the 10,000 Red Line

408cc's 51mm bore and 50mm stroke
4 x 20mm Piston valve Carburetors
Maximum power 37HP @ 8500rpm
6 speed gearbox
Dry weight 170kgs.

The dry weight should come down a a few kg's

viz · 08-22-2009, 04:35 PM

Quote:

Originally Posted by Pezz_gs

do they make a 160mm wide knobbie

I think I am going to be dead in the water with that one :(

Besides I have only just got in roadworthy condition, and rideable.

Oh well.

viz

davorallyfan · 08-23-2009, 12:31 AM

eldavo · 08-26-2009, 05:14 AM

Quote:

Originally Posted by Pezz_gs

Something similar out of Italy, about the 18 second mark

Seems everyone will love you on that bike, the Italian bystanders turned off his fuel tap and put the sidestand down for him.

Mototrans · 08-26-2009, 04:18 PM

Quote:

Originally Posted by davorallyfan

Have you seen what that crazy kid has been up to lately..., he's had some involvement with this..

08-19-2009, 08:04 PM	#1
Pezz_gs Cant ride for crap Joined: Nov 2004 Location: Sydney Skunkworks Oddometer: 2,231	XR400 Four - Skunkworks Special Yep that’s right I’m building me a little 4 cylinder adventure bike. I am organising a fundraiser for the Down Syndrome Association of NSW called: Scrapheap Adventure Ride 2010 Raising Money for Down Syndrome Association of NSW www.dsansw.org.au Ride to: Wanaaring When: Easter Saturday - April 3, 2010 Rules: Have to buy a Bike for less than $1000.00. Can be any road registered motorcycle. You are allowed to spend additional sums on the bike to make it run and roadworthy, all machines participating must be registered. It costs $100.00 to enter paid directly to DSANSW. You can raise additional funds through sponsorship of your ride. (Pay cents per Kilometer) Above is the donor bike. A mate, Shane, give me this little beauty for $0.00. Thanks Buddy I want to splice on a XR front end, wheel and swing arm rear wheel. Still wondering what fuel tank, seat and guards to run. Need to build it as cheap as possible. I will not be butchering this bike as will be able to return it to CB400 Four at the end if I wanted too. When I first looked at it, it is very small. And quite light. I will keep posting as I progress. I had an old KTM muffer I had laying around in the garage and some old KTM Tank Seat and Guard. Bars will be a bit hard to turn. Looks too modern and losing that classic look. Let try a R80G/S Single seat?? There will be lots of trying and looking and binning. I have a set of alloy Krauser pannier and topbox frames somewhere in the BMW parts in the shed and will probably use them with plastic gerrycan panniers. Plus a home made topbox. OldDog is building up and old TS250 which is below and tHEtREV is coming with his RZ350 Dirtbike. So if anyone has some old XR bits I would greatly appreciate your assistance __________________ Pezz :) Scrapheap Adventure Ride 2010 - www.scrapheapadventure.com.au I'm not a complete idiot -- Some parts are missing 1980 BMW R80 G/S Dakar - Wolfenfighter 1985 BMW R80 G/S Dakar Grace's R90/6 Outfit Plan to build me an Airhead Offroad Outfit XR400 Four (460cc) - Yajyuu Last edited by Pezz_gs : 09-03-2009 at 05:41 PM.

08-19-2009, 09:16 PM	#3
viz 1200 GSA wannabe Joined: Nov 2006 Location: Sydney, Oz Oddometer: 148	Ummm would my FJ qualify? Got it for free, though had to spend a quid to get it back up to scratch... viz __________________ 1984 Yamaha FJ1100 - I got it for free! :)

08-20-2009, 01:05 AM	#5
Pezz_gs Cant ride for crap Joined: Nov 2004 Location: Sydney Skunkworks Oddometer: 2,231	Been doing some measuring around the rear end. Anyone have a XR who can measure the swing arm for me? The width of the swing arm at the pivot is 200mm. The 400's swingarm length is around 450mm, how long is an XR swing arm? Noticed the Redline on this bike is 10,000rpm __________________ Pezz :) Scrapheap Adventure Ride 2010 - www.scrapheapadventure.com.au I'm not a complete idiot -- Some parts are missing 1980 BMW R80 G/S Dakar - Wolfenfighter 1985 BMW R80 G/S Dakar Grace's R90/6 Outfit Plan to build me an Airhead Offroad Outfit XR400 Four (460cc) - Yajyuu

08-20-2009, 01:13 AM	#7
Matt Dirt Virgin Joined: Apr 2007 Location: Newtown,Sydney Oddometer: 822	This is going to get interesting. I might just start looking around for a banger. __________________ "A girl riding a motorcycle?...................What is this, the Twighlight Zone??" Why do people think bike riders all like rock'n'roll??

08-20-2009, 01:29 AM	#8
Pezz_gs Cant ride for crap Joined: Nov 2004 Location: Sydney Skunkworks Oddometer: 2,231	Something similar out of Italy, about the 18 second mark __________________ Pezz :) Scrapheap Adventure Ride 2010 - www.scrapheapadventure.com.au I'm not a complete idiot -- Some parts are missing 1980 BMW R80 G/S Dakar - Wolfenfighter 1985 BMW R80 G/S Dakar Grace's R90/6 Outfit Plan to build me an Airhead Offroad Outfit XR400 Four (460cc) - Yajyuu

08-19-2009, 08:23 PM	#2
carmima Just old Joined: Apr 2008 Location: Northern Beaches, Sydney Oddometer: 1,698	this'll be worth watching - good on ya pezz

08-20-2009, 06:35 AM	#9
redneckdan Hold my beer & watch this Joined: Oct 2008 Location: Houghton, Michigan Oddometer: 279	Pezz, man, yer not helping..... I want so badly to stuff a 500cc ninja mill into my KLR650....but my wife would kill me. I do have an XR250 frame sans engine....think a ninja 500 engine would make an old XR scoot?

08-20-2009, 07:28 AM	#10
OldDog Smelly Adventurer type Joined: Feb 2005 Location: Cobar, Australia Oddometer: 2,517	Perry, have you been over-medicating again? __________________ "Never trust a man who, when left alone in a room with a tea cosey, doesn't try it on" Billy Connelly Ducati Monster Enduro Suzuki GSX 1400 K7 (SOLD) BMW R1150 GS Adventure (the fast Black one)

08-20-2009, 06:53 PM	#11
Pezz_gs Cant ride for crap Joined: Nov 2004 Location: Sydney Skunkworks Oddometer: 2,231	Na mate but you should smell the stale fuel in the tank . . . Some intersting CB400 Four Facts apart from the 10,000 Red Line 408cc's 51mm bore and 50mm stroke 4 x 20mm Piston valve Carburetors Maximum power 37HP @ 8500rpm 6 speed gearbox Dry weight 170kgs. The dry weight should come down a a few kg's __________________ Pezz :) Scrapheap Adventure Ride 2010 - www.scrapheapadventure.com.au I'm not a complete idiot -- Some parts are missing 1980 BMW R80 G/S Dakar - Wolfenfighter 1985 BMW R80 G/S Dakar Grace's R90/6 Outfit Plan to build me an Airhead Offroad Outfit XR400 Four (460cc) - Yajyuu

08-23-2009, 12:31 AM	#13
davorallyfan Looking at the cutlets Joined: May 2005 Location: Tropical Canberra Oddometer: 8,477	__________________ Well we all are... http://www.youtube.com/watch?v=ksOzv...eature=related

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