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DT125R Forum -> Tuning -> 2 cylinders an threaded studs
Post Info TOPIC: 2 cylinders an threaded studs
tripr


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2 cylinders an threaded studs
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went to replace my top end gasket today as i was boiling a little water blowin the top off the expansion tank.

finished putting it all together doing up the final top nut an it tugged the stud right up through sealed top of the nut pinged off . so the cylinders internal thread is stuffed peein out water

 

so  got to it put on the standard bore top end an piston  did up the final front nut   an guess what same again   stud pulls striaight through ruins my cylinders thread 

now im stuck out cant get home without a 5 mile walk   bulliks

needing another clyinder  to match of of my pistons at standard   or a +1.50  now   desperatly.

An im not a happy chappy   tempted to take 2 litres of water an let it pizz out everywhere  to get home still



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the only way is YAMAHA DTR


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all cylinders need to be bored exactly to the piston because no two pistons are the same, otherwise piston will be sloppy to bore or to tight. although i do have a barrel forsale standard bore but needs rebore and has a drilled hole init (more info on my thread) gud luck



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tripr


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got it home anyway bit of an ordeal stopped the leak anyway but it runs like a bag o crud at the mo the standard piston dont really fit big gap.. how bad is your top end m8 could i run it anyway or is it nailed.
iv been havin a search online for a rebore service close by with no luck is it costly do ya know.

this cylinder iv knacered with +1.50 runs perfect an is in good nick with a fitting piston too , the left side top studs completly stripped the thread out of the cylinder barrel.. i really wana try an sort it out somehow



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nope i think i went bang, the drilled hole had a temp sensor in it apparently it was fuel injected http://dt125r.activeboard.com/t43307248/some-good-spares-for-sale-cylinder-snorkle-engine-case-graph/



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tripr


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bit much work for me an my knowlege on that one cheers m8 .
Im tempted just to grab another engine seen a newer one with starter motor an servos all the bits id need to run it included pretty cheap too.

be on this tomorrow though try make shift a somthing to cain a new bigger thread in my good now broke cylinder , i remeber using a big tools years ago plumbing that threaded big iron pipes could do with something like that




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GADGET


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tripr get yourself a helicoil kit from machine mart etc

you'le use it again aswell

you can sort any thread with it smile

will save you money and time in the end

hope this helps dude



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tripr


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Nice one fella exactly the kinda thing i was lookin for cheers m8, not a clue on how to use one but ill work that out.
still gonna have to buy a backup lump i think dont like all the stress of it breaking
i got 2 engines 2 dts an not one works properly at the mo.
this ones good though i can sort this now tomorow safe man,
the others still not likein starting of the kick no matter how good the top end is the bottom end is a nobhed. may just get rid to increase my funds would make a good engine its solid sounds fine when it actually starts , gotta be a coil or stator


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tripr


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Not been a good day blown my piston to smitherens earlier not damaged the cylinder though lukily .. Iv rethreaded my other cylinder though so thats good just waiting on me yamabits ebay gaskets comin tomorrow hopefully

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GADGET


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did you get the helicoil kit ????



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tripr


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yeah thanks m8 its worked well to the studs holding tight cheers. learnt my lesson now though i wont be riskin riding when i fit a piston with a 2mm gap again that was a push my legs are stuffed m8

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GADGET


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make sure you get all the bits out from the crank case fella

did it smash  ??? confuse

are you using a yamaha head gasket ???



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tripr


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yeah been through it ill do it again in the light ripped the bottom out off the piston iv rebuilt most of it so i know i got most of the bits out.
its just a cheap gasket set on ebay m8 15 quid the full set

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GADGET


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all the other gaskets should be cool but deffinatly use a genuine head gasket

you can get one for about £11...they are the only ones that work

hope this helps man



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tripr


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yeah wanted that one myself this time but ordered theses cos i know yamabits will have the bits i need desperatly, an deliver the next day. ( im stuck at my mrs again lol gotta get back today to sort out my dog too .
them white tin gaskets aint to great are they i got 2 runs outta the last one an it problably went straigh away as it boiled cooant from the day the top end got done
cant seem to source any of those blackhead gaskets though as cheap as ya say m8 found em at 26 notes bout it.

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GADGET


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these ones are by athena   

http://www.ebay.co.uk/itm/NEW-YAMAHA-TDR-125-TDR125-TOP-END-GASKET-SET-ALL-YEARS-/350110065787?pt=UK_Motorcycle_Parts&hash=item51842fa47b

they are made in the same factory as the genuine ones with the same materials

£19 i know but still better than £26...... plus you get exhaust and base gaskets aswell

you should be able to buy the genuine one from any bike shop (they might have to order it so could take three days )

julian soper motorcycles near me sells them for £11 so you should be able to get it cheaper than £26

good luck fella



-- Edited by GADGET on Tuesday 5th of July 2011 06:33:29 PM

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tripr


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cheers m8 good source for the future that to.
the full set came this mornin so got it sorted propely FOR NOW but with past experiences, i got about 3 hrs use till it goes lol.
I think ill get one off these in house for the next time it does go


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GADGET


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good call man



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tripr


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gaskets gone again well it went the other day got about 4 days outta that one good goin lol
an i aint even got round to getting another one yet either gutted ,

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GADGET


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hey dude

i see from the other thread that you got one for like £12

thats good to hear

is it genuine ??????



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tripr


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yeah iv told em to make sure its the black one im after not the leaky white tin thing.. energised sent me to k2 motorcycles an it looked like there a proper yamaha dealers to so thats handy to know,,

got some new issues now check these vids out im gonna shove up in videos electrics i know the engine runs i know the engine starts easy ava listen m8

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