My WR478.

16 messages
18/01/2008 at 23:11

Over the next few days I will be showing the full engine nut and bolt/bearing rebuild on my Yamaha WR450.

Wiseco 478cc piston, selected new gears in the gearbox, and cam timing procedure.

This will include a selection of pictures as to why it needed to be done.

Then to follow will be the rest of the build which includes RTT steering stabilizer, powder coated frame and pimped wheels.

Should be good when its finished........before the end of March...for the VD run in Wales

18/01/2008 at 23:37

Left casing outside.

Left casing crank side.

Right casing clutch side.

Right casing crank side.

Wiseco 478 piston.

Gearbox to follow.

19/01/2008 at 00:21

will be good to see whats involved with a major rebuild.

i know who i will be pming if anything goes wrong with my wr400

19/01/2008 at 03:19
will you be able to ride any better????????
19/01/2008 at 08:51
what year is your 450 ?
19/01/2008 at 17:52
2003 mate.
19/01/2008 at 18:14
coming on nicely then chris  it will be the best 2003 450 that money can buy
19/01/2008 at 18:41

Engine casing right side with new bearings.

Engine casing left side with new bearings.

Left side with gearbox and crank fitted.

And another.

Right side with partial build up.

Two halves together.

Conrod assembly got replaced as a matter of course.....good job really as fatigue was found.

19/01/2008 at 18:43

The reason for the strip,loss of 4th and 5th gears.

And this is what happens to a selector fork when it has gears pushing against it that won`t engage.

More to follow.
Edited: 19/01/2008 at 18:45
19/01/2008 at 20:27

oooooo ya fooker than bigend dont look great does it, oil starvation for sure as you said on the phone. You was lucky that the gearbox went first because if the rod had snapped as they do, they normally punch a whole through the cases front and back & ...........................$$$$$$$$$$$$$ 

19/01/2008 at 21:40

Chris  ......................

you need to get out more ................... anal or what

Just fix the fcuker will you and let's go


IF YOU DON'T CRASH .............. YOUR NOT ON A DIRT BIKE :burnout:
Edited: 19/01/2008 at 21:41
19/01/2008 at 22:08

You`re just jealous cos the closest you get to a `spanner` is someone who resides in Nantwich...


21/01/2008 at 00:30
brokenlegs wrote (see)
coming on nicely then chris  it will be the best 2003 450 that money can buy

Why? Is he putting a KTM 6 speed box in it?

I loved my WR, but them Yammy 'boxes....... just poo. Thought about getting the dogs undercut a bit to help them engage more positively & last a bit longer, but then had a moment of clarity and just got rid of it.

18/02/2008 at 23:42

Comming on nicely.

Welded on steering stabilizer post.

Not long to go now.

The dogs....

19/02/2008 at 00:19

looking top yoke setup there
Edited: 19/02/2008 at 00:20
19/02/2008 at 11:29

Chris, your bikes in your house! Jeeze my wife would kill me even if I brought a spanner through the door (hence why none of you lot can visit me..). You lucky bugger.

Will the bike be ready for 4 weeks time then? When are you running it in?

Anyone Fancy a Pre-South-Wales North Wales run?

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