XR400 Four - Skunkworks Special

[Pezz_gs]

Well over the weekend I got to do a little surgery on the little 400/4.
As it is not running I decided to pull the carbies out and give them a thorough clean and service.



A broken manifold will need to be replaced.



A quick look inside the Carb’s shows number 1 opens a long time after 3 & 4 and 2 doesn’t move at all. I will post the carbie rebuild photo’s as I go.

I will be doing a compression test but from the look of it a head gasket might be on order too. I am just weighing up how far to go with this, as it is not a restoration. I will know once I have the comp test numbers.



I am still looking for a XL or XR front end ???

[tHEtREV]

Bout time you started...

My RZ still looks pretty much the same even though I have been busy building a new shock mount and other small but important jobs.

[Pezz_gs]

Originally Posted by tHEtREV

Bout time you started...

My RZ still looks pretty much the same even though I have been busy building a new shock mount and other small but important jobs.

Yep, but I can see it taking a liitle more effort that I first would have thought.

Lots of Little jobs on the list to get sorted

Just have to get into it . . . . .

[Pezz_gs]

Nice little pic of a Z750 from Wrench Monkeys

[Pezz_gs]

I have found a great deal on a 460cc piston kit for the 400/4. $360 landed in Sydney.

Now I have to do a Compression Test to see if it needs the rebore.


MMMMM XR460 Four

[carmima]

Originally Posted by Pezz_gs

I have found a great deal on a 460cc piston kit for the 400/4. $360 landed in Sydney.

Now I have to do a Compression Test to see if it needs the rebore.


MMMMM XR460 Four

stop muckin about and get into it

[Pezz_gs]

Originally Posted by carmima

stop muckin about and get into it

So should you . . . . sweet talk the Missus yet??

Im doing the cheap stuff as cash is tight this month

[carmima]

Originally Posted by Pezz_gs

So should you . . . . sweet talk the Missus yet??

Sweet talk - mate I'm heading to Cape York this weekend (solo) - ya reckon that translates to sweet talk

I reckon all I'm doing is this

[Pezz_gs]

Well I have just completed the compression test tonight

1- 55 then 73 psi
2- 54 then 68 psi
3- 70 psi
4- 65 psi

A little bit of oil in No:1 and 170 psi, which is where it should be.

Looks like a 460cc kit is on the way.

Have also been looking at the air filtering system, looks like a lot of places for leaks, so I will have to have a good look at that as well. Im not a fan of pod filters and I can get the foam ones. I will be riding over 600k's of dirt and gravel when its finished, so any suggestions ???

Coming soon the engine tear down pics

Still looking for an old XL or XR front end and swingarm

[davorallyfan]

Super freaky

http://www.youtube.com/watch?v=75qXUfp4wtw

[Pezz_gs]

Well, my 460cc BIG bore kit turned up on Friday

Look like very good quality and at a very reasonable price

Now I have to pull the engine down to get it re-bored.



PS: Im still looking for an old XL, XR, NX, SL, CL Honda Front end and swing arm or complete bike

[Pezz_gs]

Back to reason for the build.

We are about to officially launch the 2010 Scrapheap Adventure Ride.

I will start a new thread but here is a pic of one option I found on the Web

I can see OldDog riding this sucker

[johno]

I bought a CM250 belt drive when they were new. Was a great bike.
Used to ride 2 up all the time on it.

Still wouldnt mind a goody in the shed

[carmima]

Originally Posted by Pezz_gs

Back to reason for the build.

We are about to officially launch the 2010 Scrapheap Adventure Ride.

I will start a new thread but here is a pic of one option I found on the Web

I can see OldDog riding this sucker

I love it

That's the business for sure

[Pezz_gs]

I may have an oil leak to fix



Here is the rocker cover. A little pitting on 2 of the cam followers.


Pretty clean inside



More tomorrow night