DT125R ARCHIVE

PatMan · Guru

RE: DTDAN'S CURSED DTR REBUILD

vtec2008 · DTR Respected Member

I must admit it was very daunting doing my rebuild. Its just remembering were everything goes. And not fecking the engine up after putting it back together. After you do it the first time it becomes a peace of piss. Hey GADGET my bike has 14k on the clock and was restricted till i got it, do you think my engine bearings need replacing?

-- Edited by vtec2008 on Saturday 16th of July 2011 03:57:56 PM

GADGET · Guru

just keep your ears out for the dreaded rumbble man

mine has done over 24,000 on its original bottom end and kicks arse man

its all about how its been treated not the milage so as yours was restricted until now its probs not had to work too hard in its life

if you get a vid in here ,nice and close with the mic,ill let you know what its sounding like ..but you gotta move the camera slowly as you let it rev up and down so i can hear top and bottom

thats the only way i can let you know realy

biggrin biggrin biggrin

-- Edited by GADGET on Saturday 16th of July 2011 10:58:58 PM

vtec2008 · DTR Respected Member

Have all the bits for the bike now. Just waiting for this poxy rain to stop lol. I will make a video of the bikes first start....thats if i dont have a piston sticking out of my forehead lol.

BTW got a halfords feeler gauge and measured my piston ring "end gaps"
Im guessing the gaps are a tiny bit over 0.30mm and not 0.40mm sinch 0.40
wont fit in. Stupid gauge only goes up in steps of 10. It that a good measurement?
Im guessing my gaps are about 0.34mm.

GADGET · Guru

hey there vtec

are you doing a top or full rebuild dude??

if you are gonna have your cylinder bored out ,get your piston and give it to your machinist and give him the specs before doing anything else .(if you need specs you can tell me the yeah of your engine and ill get it strait away)

just from the specs and piston he can machine it within tollerance and you will have a nice engine

let me know how far your goin into the lump

make sure you put your piston rings in the right way round man(the writing always goes on top ) smile and you have different shape rings in the pack,keystone etc

goodluck dude

vtec2008 · DTR Respected Member

Its just the top end.
The guys at PJME Motorcycles bored it out to 56.50mm and sold me a Mitaka oversize .50 piston and Rk rings to match. The lads at pjme measure and use the Mitaka piston and rings for their rebores. They charge you more if you supply your own piston. I was after a Wossner but it was breaking my budget.
And the rings are the right way around, their kind of idiot proof to be honest. Just finished puting it all back together tonight.

GADGET · Guru

hi fellas

just a quik update

dtdans on 400 miles into the run-in now and it sounds sweet as a nut

not a single prob

100 miles till we can open her up biggrin biggrin biggrin biggrin biggrin

will let you know how she rolls wink

+ i tryed to make a braket for my camera but stripped the threads outta the cam cry

so im gonna make like a claw thing to hold it then we'll put some vids up

got some pics of my next project (1990 yz 250 evo) if ya like but might make a thread of it dunno as iv not done so many pics of this one

will add vids of this build tho when i can

-- Edited by GADGET on Sunday 24th of July 2011 11:49:14 PM

GADGET · Guru

just an update to this old thread

this engine is now dead cry cry cry cry cry cry cry

it sucks i know

GADGET · Guru

498 miles into ....500mile run-in and bang

GADGET · Guru

i thought i was gonna get swamped with Qs like why and how

oh well il just tell you then ....oil supply failure ....after all this..

the crank is knackerd again ..its the bigend rod bearing thats failed but if this has died coz of oil then what else has it damaged

bore and piston (498 miles) are fukked...so is plug....gaskets etc ...and probs main bearings cry cry cry cry cry cry ...oils fukked coz of bits...

dtdan has another dtr now so who knows what hes gonna sell for parts

youve seen the build now buy the spares lol