DT125R ARCHIVE

stillbroke · Guru

got to have another rebore its at 1.00 now but the scor marks are quite deep is it possible to go to 1.5 ?

slob · Guru

Doubt you will have to take that much off. I just got 0.5mm of a standard bore after a chav riding it for 12 000 miles with zero maintanence even 2 stroke oil at times. so I reckon you should send it off to pjme.

dread123 · Moderator

why are skimping on the job? just use all new bits and then get it right 1st time?? you seem to be chucking good money away like it was rubbish.

DT200R MACCA · BANNED

+1 on that like if u fuk it up again u wona pull the petrol pipe of and blaze it and forget about motorbikes

Calum122 · Guru

Lol. I thought you were at wits end with this bike?

stillbroke · Guru

lol i was cal then you stepped in :) and it wasnt that i skimped i simply lost the pin and had 1 lying around that seemed to be ok .the first 2 times that this bike went it was the rings hitting the exhaust port or pv chamfered both no longer had the pro .band the oil pump was incorrect but thanks to cal it got sorted,2nd time was a cheap gasket set from yambits that caused an air leak and the bike went berserk and revved itself to death ,i returned the piston to yambits and they gave me a full refund for that piston ,the gasket set ,the next piston and the rebore .this time was my fault entirely

im not a quitter .

i bought this bike 8 months ago from maidstone in kent drove it back to dorking .when i got back to staines it leaked all of its oil ,the exhaust had gun gum on it ,bottom end bearings were fried every seal was kaput carburretor had both screw seized and a gasket missing the forks were twisted ,and none of the dash worked

i have pictures of start to finish ive not done to badly really its never been to a garage the bottom end is fine

this is what this bike has had spent on it
i dont skrimp

4 rebores with pistons £379
1 piston £75
crank split and balanced £30
conrod kit yambits
every seal replaced (yambits)
every nut and bolt rplaces
indis all replaced
head bearings replaced
crank bearings replaced
whole gearbox replaced
clutch cable replaced
new chain and sprockets
headlight replaced
water pump serviced
oil pump serviced
bottom end fully rebuilt
5 gasket sets
3 genuine gaskets
fuel cap (oem)
dtx carb £50
master cylinder back and front
yz 250 muduard
poligrips
new levers (oem)
all the little bolts (oem)
all gearbox bearings replaced
big one full exhaust sytem £200 (fvcking ****)
1 off graphic kit
i dont skrimp and my standard of work is good hence why the bottom end hasnt gone despite the amount of heat seizes and bike being run without oil so given all of the top this being my 2nd mistake fitting all of this gear. i havent done bad the first mistake was losing my temper with the carb and putting a hole in the float bowl this is only the second . callum nev and norfe are legends especially cal as he gave me a little kick and i kept goin on it .when you have to use a thing for work these mistakes are made.if it was a project like many of you lucky ****ers out there would have been no shortcuts NEVER TAKE SHORTCUTS when you have a top end sitting there and 1 circlip but know youve got another and youve got work the next day it happens ,anyway when the bike did run it run perfect it never idled properly but when i got that new carb it was bang on :d

Calum122 · Guru

My dt is my only form of transport mate. It's been off the road for 6 months. I could have bodged it together by now but I know in the long run it isn't worth doing. Yeah it's a project. Yes I would like it to get to work. But I don't do things by halves. I'd rather have it off the road for 12 months and get it all legit than build it wrong only for it to fall apart.

I get the bus or walk to work. Cycle most days. It's only your determination that restricts the possibilities.

stillbroke · Guru

cant walk or get the bus work on farmyard machinery have to use the bike :(

Calum122 · Guru

I'm sure you could cycle.

stillbroke · Guru

not 30 miles round trip a day hahah

NEV · Guru

Sorry to hear of your predicament Still mate, it must be a right pisser that, especially as you rely on your bike as your only form of transport, there are a few unwritten laws out there concerning bike maintenance, one of them being that you never re-use a piston circlip, you've obviously found out why by now, everyone makes mistakes it's only natural, but as long as you learn from them its all part of the learning curve. A little tip that I do whenever I get a new car or bike, is I make up a workbook in Excel, writing down all the important stuff, such as when tax is due, insurance, M.O.T due date that sort of stuff, then things like vin number, (a fair few bike shops need this for when ordering parts) and then all the specs for the bike, such as piston sizes, spark plug type, tyre sizes, tyre pressures, type of oils etc, and next to the standard spec stuff I'll write down any of the modifications done on the bike for comparison and reference. Something else I suggest you and anybody else who has to rely on their bike as their only transport is to make a second page in your workbook, and then make a list of stuff you'd need if say your bike broke down on a Sunday night and theres nowhere open to buy parts, and you need to be running for the next day for either collage or work, add to this list stuff such as spare gasket sets, nuts and bolts, oils, spark plug, carb bits, piston circlips, anything you think may be useful to your bike, to have as back up, then when you have a few bob spare, buy a couple of bits now and again then tick them off your list, you may be working on your bike till the early hours, but at least you'll make collage/work the next day.

Calum122 · Guru

Another good idea is this mate

You still got that other cylinder? Don't throw it away keep it. Once the bike is back on the road get yourself another bottom end that's the same as yours. Get it rebuilt. Get that cylinder refurbished. But the two together and keep the engine in a box safely stowed away. Should something go wrong I.e. the oil pump stops working and you didn't realise and the bike seizes you can just drop the engine. Put the other freshly rebuilt engine in and bobs your uncle. In a few hours time you're back on the road after a major breakdown. Then start the process again. Rebuild the broken one and stow it away.

I know a few on here do that. Or have done that.

stillbroke · Guru

cheers for the suggestions,its still on the same cylinder .i really am thinking about a re-sleeve as i dont like taking the bike this close to its limit and i actually think that bits of ring and other **** were in the bottom end the first time it went i never gave it a second thought .so im going to flush it out within the next week as im really really hoping the bearings havent gone kaput as when the crank is turned you can hear them rolling if you get me? wouldnt call it a rumble .im pretty sure this is a full rebuild again top to bottom and im gettin tired of my graphics so maybe change them to im probably going to lose this job now anyway it was a good contract but i cant be relied on to get there on time ,you know when you get the feeling your about to be sacked ? when the boss looks at you while hes talkin to somebody else and avoids you like the plague? well ive got that feeling plus its not proffesional staying in a tent for 3 days a week on the bosses premises and going to work lol plus it feckin cold hahah

NEV · Guru

Why re-sleeve? with the Black bike I had it bored out to take a 2.5mm oversize piston, whilst still keeping the same liner, fair enough I had to have the dtr/tzr barrel re-lined, but that's for a 4mm oversize piston.

stillbroke · Guru

tbh honest nev im scared :( i dont want it to go bang again i run the bike with pv pegged open so it doesnt function but im worried if i go bigger it will blow

NEV · Guru

The Black bike runs lovely on a 2.5 oversize but I reckon that's about the max without re-lining, they're pretty much bombproof as long as they're looked after.
Just go say 1.5mm oversize if you're worried, but make sure you run it in properly, or you'll need another re-bore before you know it

stillbroke · Guru

cheers nevwin ,any idea what a 2mm would translate to cc?

NEV · Guru

133.9cc

stillbroke · Guru

thanks ,any more advice as im pulling the lump out tmoz and will build it up ,im looking for the cheapest of cheap places to sort my brrel out now do you knowanywhere? and i need a link for a decent 1.5 pissy

DT200R MACCA · BANNED

http://www.ebay.co.uk/itm/Yamaha-DT125-DT-125-88-08-Wossner-Racing-Piston-Kit-/300615482988?pt=UK_Motorcycle_Parts&hash=item45fe143e6c

ask him for a 1.5 piston before u order

NEV · Guru

Order the small end bearing too, along with the piston, head gasket, and base gasket.

stillbroke · Guru

got the small end bearing and base genuine gasket now gotta get the top gasket also got some castrol act evo which i think is mineral .got some hylomar sealant for the two halves . waiting on a reply from the rebore place about the head being modded

stillbroke · Guru

about to take this lump out wish me luck i hate doing it :(

NEV · Guru

You'll be fine, take plenty of photos with cam/phone useful for putting stuff back together again. plus print off stuff from manual for reference, to hand

stillbroke · Guru

thats that c u n t out

stillbroke · Guru

mains are absolutely ****ed!

slob · Guru

Atleast you know that now. I take it you are doing a bottom end rebuild. I have stripped mines down recently. As Nev says take plenty of photos. And I used cable ties to keep stuff together in the right order for reassembly.

stillbroke · Guru

wasnt planning on doing the bottom end but with the amount of dodgy top end buisness thats gone on i though id flush the bottom out really dissapointed to find that there both gone its money money money

Ralzy · Guru

Next time you need a rebore stillbroke try shopping around as you can get it cheaper than what you paid like you have said yourself you know they have overpriced you

-- Edited by Ralzy on Friday 8th of March 2013 07:02:51 PM

stillbroke · Guru

*update*
got all the following:

new mains koyo (6305r1)
yammy genuine base gasket
athena head gasket
tzr 125 2.00 mm oversize piston
left and right side main seals
little end bearing genuine
genuine inlet gasket

will have this rebuilt in the next 30 mins or so .
then its rebore time and the head also has to be machined to match the oversize really dissapointed with the company im using as the rebore and hone comes to £38+vat and the head is £28 +vat think its a rip off really

getting there....