DTR Build Up
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@ConnorDTR Won't be mine MOT is for squares...jokes. Good luck when is it due.
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How long did it last? because i've recently replaced the head gasket on mine with a cheap one.
@LJK_hunter 60 miles...
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@ConnorDTR said:
Guess who's suffered from using a cheap headgasket.... This mug
You really should have known better!
Athena or Genuine, ever!
@Calum I really should have, bikes going to be off the road now for a week or so. Ruined my fresh new top end. Also think the head could be warped so going to take it all into college and test it. Well i have a new athena top end gasket set on its way and have a spare cylinder that just needs a quick hone which should last until the end of the month where i can afford a proper rebore
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@Calum I really should have, bikes going to be off the road now for a week or so. Ruined my fresh new top end. Also think the head could be warped so going to take it all into college and test it. Well i have a new athena top end gasket set on its way and have a spare cylinder that just needs a quick hone which should last until the end of the month where i can afford a proper rebore
@ConnorDTR said:
@Calum I really should have, bikes going to be off the road now for a week or so. Ruined my fresh new top end. Also think the head could be warped so going to take it all into college and test it. Well i have a new athena top end gasket set on its way and have a spare cylinder that just needs a quick hone which should last until the end of the month where i can afford a proper rebore
I have written a guide to skim the head on here mate. You won't need a professional skim unless you reallh have cooked it!
Be alright mate they're fairly resilient. But you now you know.
Always Originate, Never Pirate!
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@ConnorDTR said:
@Calum I really should have, bikes going to be off the road now for a week or so. Ruined my fresh new top end. Also think the head could be warped so going to take it all into college and test it. Well i have a new athena top end gasket set on its way and have a spare cylinder that just needs a quick hone which should last until the end of the month where i can afford a proper rebore
I have written a guide to skim the head on here mate. You won't need a professional skim unless you reallh have cooked it!
Be alright mate they're fairly resilient. But you now you know.
@Calum That's where i found the other info i posted up lol, just need to wait for my dad to go out so i can steal the bathroom mirror! Hoping it'll be good for a bit, was so fun riding the bike! Also offroad is hard, i'll post a proper update in an hour or so
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Well here's how my first day riding my bike went,
http://i.imgur.com/WSsEKxc.jpg?1
Just a little pre mot prep, checking bearings are tight all lights are working etchttp://i.imgur.com/EPdAqV3.jpg?1
Admiring my creationhttp://i.imgur.com/e9wIrrS.jpg?2
Passed with no advisorieshttp://i.imgur.com/UomhNDp.jpg?1
Went for a good ride with my friend Darryl, we checked out a few trails and i dropped my bike for the first timehttp://i.imgur.com/2Rvbv2c.jpg?1
Went out later in the night to meet my friend from college and his mate as they fancy a DT too! However as soon as i got there the bike cut out, would kick over fine but wouldn't kick in. Tried bump starting it but still no avail, until the loudest bang every could be heard from my bike. This was when i suspected something was seriously wrong, as when you kicked it over there was a new, very questionable noise so i suspected my bottom end has gone.http://i.imgur.com/NoMC7gZ.jpg?1
http://i.imgur.com/Zy06OBM.jpg?1
http://i.imgur.com/Qs0ch8l.jpg?1
When i got home (Thanks to my friend Dan for getting me in his van) I decided to get right down to it and strip the cylinder off in the freezing cold in my shed, Can see what i believe is called a four point seizure, to do with the piston heating up and expanding quicker than the cylinder so the piston gets stuck in the cylinder. When i drained the coolant i saw there was bugger all in there, 100ml at best and it wasn't the same colour as when it went in.... plus the coolant expansion tank has shot out its cap.So i've ordered an athena top end gasket set and going to reuse the old cylinder with a quick rehone and the old piston as there are no marks at all, skim the head using Callums glass and wet and dry method, refill the coolant and hope that she runs again. Going to keep an eye for any white smoke and the expansion tank this time
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@Calum That's where i found the other info i posted up lol, just need to wait for my dad to go out so i can steal the bathroom mirror! Hoping it'll be good for a bit, was so fun riding the bike! Also offroad is hard, i'll post a proper update in an hour or so
@ConnorDTR that's the one mate. Flat surface as possible. Nice ciruclar motion.
Believe me, if you have read my.build thread then you know it can sort out a battered 21 year old engine that had clearly been run with the head gasket gone for a long time lol.
Always Originate, Never Pirate!
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@ConnorDTR that's the one mate. Flat surface as possible. Nice ciruclar motion.
Believe me, if you have read my.build thread then you know it can sort out a battered 21 year old engine that had clearly been run with the head gasket gone for a long time lol.
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@Calum What grit did you use? Pretty sure i've got some fine emery cloth here aswell, or is that still too rough? I've got 2000 grit but it's those crap little rolls that are about 10 cm wide from halfrauds
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@ConnorDTR pretty sure it was 120, 240 &460
@Calum That's the cylinder i'm going to save for a proper hone or if need be a rebore, also not going to use the same place as last time, £140, supplied me with cheap gasket set and a mitaka piston and it took 2 months... Think the reason it didn't run was because all the compression was leaking past the head gasket then. And that's pretty low, quiet a rough grit then? I have some 400 grit from doing my wheels, i'll give it a go tomorrow cheers
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@Calum That's the cylinder i'm going to save for a proper hone or if need be a rebore, also not going to use the same place as last time, £140, supplied me with cheap gasket set and a mitaka piston and it took 2 months... Think the reason it didn't run was because all the compression was leaking past the head gasket then. And that's pretty low, quiet a rough grit then? I have some 400 grit from doing my wheels, i'll give it a go tomorrow cheers
@ConnorDTR a rebore is 30. Forged piston is 60 and a genuine head gasket is 20. Done deal. I get mine done at Yamaha.
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Gave my head the gentle skim, used 400grit wet and dry as that's all i had, just means it takes longer to skim down the high spots if anything.
http://i.imgur.com/9XG04L0.jpg?1
Used the cookers glass top, just because it was a bit more like a workbench lolhttp://i.imgur.com/kRSEAhz.jpg?1
Here's the head in question, as you can see it's looking rather ugly. Did the old straight metal ruler over the head and see if any light passed underneath trick to see if there was any warpage, to my eyes i couldn't see much light. But i suppose a mm is like a mile when it comes to warpage. Haynes states anything more than 0.03mm is buggered.http://i.imgur.com/t41qiAV.jpg?1
http://i.imgur.com/dVFpdzd.jpg?1
This was after the first pass, looks a lot better, none of those huge scratches and the surface is becoming a lot flatter.http://i.imgur.com/9Oe9qRi.jpg?1
This was the state of the first sandpaperhttp://i.imgur.com/lWPfBO6.jpg?1
This is what i ended up with, i still believe that maybe i should just go a grade higher to get a more smooth finish. But atleast the ring of dirt round where the cylinder meets the head has gone. -
Gave my head the gentle skim, used 400grit wet and dry as that's all i had, just means it takes longer to skim down the high spots if anything.
http://i.imgur.com/9XG04L0.jpg?1
Used the cookers glass top, just because it was a bit more like a workbench lolhttp://i.imgur.com/kRSEAhz.jpg?1
Here's the head in question, as you can see it's looking rather ugly. Did the old straight metal ruler over the head and see if any light passed underneath trick to see if there was any warpage, to my eyes i couldn't see much light. But i suppose a mm is like a mile when it comes to warpage. Haynes states anything more than 0.03mm is buggered.http://i.imgur.com/t41qiAV.jpg?1
http://i.imgur.com/dVFpdzd.jpg?1
This was after the first pass, looks a lot better, none of those huge scratches and the surface is becoming a lot flatter.http://i.imgur.com/9Oe9qRi.jpg?1
This was the state of the first sandpaperhttp://i.imgur.com/lWPfBO6.jpg?1
This is what i ended up with, i still believe that maybe i should just go a grade higher to get a more smooth finish. But atleast the ring of dirt round where the cylinder meets the head has gone. -
@ConnorDTR you will want to do both the block and head mate since they are both ally.
Nice idea I like that. Can't imagine my old dear would be pleased if she caught me doing that back in the day haha!
@Calum It's going onto a different cylinder, i've got 2 lol. This one originally came with the engine, i just didn't want to use it because the bottom bolt for the powervalve cover was fudged. But i checked out this cylinder with the ruler and i couldn't see any light coming from underneath the ruler
But yeah i did wait for my Dad to go to work before i started doing that, he'd have actually strung me up if he saw this
