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WR400 - Supermoto Conversion + Engine rebuild


rossonza
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Right, As I'm waiting on the stem seals to arrive i decided to look at the rear light and my leaking petrol tap today.


First i had to drain the fuel out of the tank:
20140802_171515_zpssgwalrgm.jpg

Took the tap apart and the seals had worn and i could see why it was leaking petrol even when in the off mode, It was also nearly impossible to turn the tap off/on by hand.
20140802_172459_zpsw5ckpvqa.jpg

The bottom of the fuel tap filters were caked in mud/grass. i cleaned all that up and put the new seals in:
20140802_171301_zpsyknhnuf0.jpg
20140802_172820_zpsirmacix1.jpg

I put it all back together and whalaaaaaaa. Perfectly working fuel tap. Put a bit of silicone spray on the seals with moving parts. Smooth as butter now. Very happy.

I then moved onto the rear light i've recently received:
You can just about see, there is mold marks on the under side of the rear fender.
20140802_182639_zpsyubbsyck.jpg
Started drilling through:
20140802_183421_zpslsqfhfby.jpg
Im through!
20140802_184337_zpsdvug7j3m.jpg
Drilled through the light unit using the holes ive drilled in the fender as a guide:
20140802_185534_zpsvdovqd53.jpg
Not sure if the rubber washers are supposed to be on top too?
20140802_190600_zpsohlle9ia.jpg

Anyways

Before:
20140802_182842_zpsvj9cbiie.jpg
After:
20140802_190554_zpstnpbgisj.jpg


Update maybe this week. Valves should be lapped/fitted, Headgasket changed. rear light to be wired in. few other little bits but then im done.... (famous last words)

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Looking good. :)

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drilled the final hole and took the top rubber washers out. Put them below and all feels nice and secure.

20140803_142855_zpspyqsqzxa.jpg
20140803_144001_zps4oyxdji2.jpg

Just ordered some more fuel hose and an inline fuel filter. The tank was clean inside but anything to help the bike breaking down will be a + for me :-)

browsing ebay for more pointless things to buy now :P

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20140811_135120_zpspr3wim4z.jpg

Also my friend custom made a valve spring compressor just for me :-) good friends or what?!!
20140809_181652_zpshkcka2nb.jpg

Head finally being rebuilt tonight. I may have Friday off so the engine may go back together then too... then maybe MOT the following week.

EXCITEDDDDDDDDDDDDDD

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:yeah:
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Old valve stem seals out:
20140811_210331_zpsjtvaqdn6.jpg

Started lapping the valves:
20140811_213534_zpsqxlnmwip.jpg

all done by my mate ian - works in engine development
20140811_220558_zpszdx2ryqw.jpg

Valve spring compressor on:
20140811_222937_zpsueceejir.jpg

Custom tool made by ian gave us a perfect amount of room to fit the collets:
20140811_222954_zpszxghvdeu.jpg

1 new valve installed:
20140811_223749_zpslkkthsnn.jpg


Unfortunately thats as far as we got. My friend Ian's car ran out of MOT the other day and he hadnt realised. Hes since also found a lot of rot on his car which needs welding. so obviously his daily vehicle takes priority.
I've got Friday off so im hopefully going to finish the valves then. reinstall head over the weekend and book an mot for the following weekend/week.


Cheers
Ross.

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Great read so far mate....Nowt like good mates to help you out.

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Yeah, I honestly dont have the mechanical know how to do this myself. Would have been a builder/garage job otherwise so i am extremely grateful. Im a computer guy :-) who enjoys bikes

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  • 2 weeks later...

Its done!, heads got the new valves in, all lapped and ready to go.

IMG-20140821-WA0004_zpsuxskoues.jpg
IMG-20140821-WA0005_zpscscqrfx6.jpg

Just need to pop to my mates to collect the head off him, refit cams and shim. re-fit the head and test fire her up :-)

its just wire in rear light, bleed front brake and MOT...oh maybe get some fuel and do some engine tuning to get her running right.


:drool: :drool: :dirtbike:

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Nice! :thumb:

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  • 2 weeks later...

bad times....

Well as you all know from above, my head was built and ready to go on. So Dan and Ian came over Saturday and we started work :-) coffee at the ready:
20140830_125239_zps88zlcst9.jpg

Unfortunately we found a problem when attempting to fit the no3 inlet bucket
20140830_131454_zpsrhl9osat.jpg

Well it turns out the no3 inlet valve was bent, so the spring wasn't sitting right, causing the bucket to not go in straight/snag.

This is how I've left the bike:
20140830_180646_zpsju4y773r.jpg

My mate Ian has taken the entire engine back to his to hopefully run the head through a parts washer and rebuild once my new parts arrive.

I've ordered a single inlet valve and new stem seals again.

9th-15th Sept for my delivery from the USA. very frustrated now..., as through no fault of my own the bikes not on the road.

we did manage to bleed my front brake mind, so not a fully wasted day...
20140830_183600_zps3tnilb7y.jpg

arhghghghggh

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Damn setbacks. :shakeno: but it'll make it that much sweeter when you do get her on the road. :thumb:

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Heads been parts washed and ice blasted, Supposedly the parts wash wasnt lifting the deep grime off:

Before:
IMG-20140902-WA0005_zps7rklegjz.jpg
IMG-20140902-WA0006_zpspwrrt1pt.jpg

After:
20140902_170538_zpsiyzhyfpf.jpg
20140902_170607_zpsmqqla7mw.jpg

Looking much better i reckon. My single valve got dispatched today :-)

also ordered some dremel tools so i can clean up the porting on the exhaust etc.

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