DT125R ARCHIVE

satelliteone · DTR Senior Member

RE: WTF IS THIS RATTLE!!!!!

NorDt · Guru

Maybe he just wants to be rid of hes dt and some other kind of bike ?, cant see any logic in selling hes dt to buy another one..

PatMan · Guru

Hello Lads I just like to thankyou all for your help on answering stuff for me at the moment the bikes been brought and suppose to me going next weekend (we shall see) someone on ebay called steve (told him about this site) is having it he offered me the money for it, Yes I will be losing a GREAT lost on the bike, but it went for 1k in the end, if I knew the exact problem I would of sorted it, but really havent got the heart anymore to keep looking for faults and problems and taking it off and back on, off, on, etc etc, Am doing my driving test soon, so gone into the car world, got alot of friends down here with skylines/scoobys/evo's etc etc so thought it was about time I got into cars although deep down I will still love my bikes, got a car for when I pass my test (PIC BELOW) am still gonna be that boy racer type hahaha, but got myself a little modified Smart car Turbo, re-mapped. alloys, k&n induction kit, dump valve, etc etc you know how it works, will still be about, got a few of you on facebook so thats good if any of you others wanna add me (hope you do search for me (pat patman mahon).

-- Edited by PatMan on Sunday 26th of February 2012 04:10:48 PM

satelliteone · DTR Senior Member

good luck on ya car test chap, always a great thing to do. worth while. Just cost a shed load to own 4 wheels. I have a car and a bike, like the car for doing the boring stuff, like shopping, getting to GF`s in the cold n wet. But always pine for my bike for when the sun comes out.:)

Perhaps in the future, when ya better off and get both too. Dont for get to pop in the forum tho and say hi now n again.

Calum122 · Guru

You seriously bought a Turbo charged smart car!!! Haha looks mint to be fair mate. Good luck on your test, but really at the moment the car test is a piece of piss.

That rattling sounds like a bugger!!

I know that the clutch is weighted and that the plates need to be put in a specific order. But you would know if it was the clutch cause it would vibrate like a bitch!

tripr · Guru

youch that is a rattle an a half aint it. you got yourself a nice bike there m8 wont take much to get it sorted

sounds like a pv knock or small end bearing is there any play in the rod top or bottom.

i have a +1.50 piston an the guy at the shop sorted me a wider small end bearing that suited the internal of the piston better ,gave it less sideways give.

gasket sets all over ebay fella if its not that gearbox nut being loose try 2 base gaskets to raise the cylinder more ( the head may not be overbored an have a lip) Knocking the piston crowns edge is there any markings on your piston crown at all m8

you may need to buy a black top gasket seperate. just make sure you get everything tight hammer your wrench handle for a bit of a shock.

or get yourself a running cheap backup lump slapped in there well you fix it. works for me lol im never off the road anymore

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

http://www.ebay.co.uk/itm/Yamaha-DT125R-Engine-full-rebuild-/280861805414?pt=UK_Motorcycle_Parts&hash=item4164ab0b66

-- Edited by tripr on Wednesday 11th of April 2012 09:23:33 PM

Geordie135 · DTR Member

hi

i bought the bike off pacman. we have had the top end off the bike and it is all fine. when we took the cluth cover off we noticed one of the cogs on the gear box was loose, (top cog in the pic below) does anybody know if this is a common fault or if we will need to strip the gear box down to fix it? also does anybody know where the best place to get a gasket set from is? and if i will need to get a different one from standard since it has been bored out to 58mm? sorry if the questions sound stupid but i know next to nothing about bikes so wll need all of the help i can get

cheers

NORFE · DTR Trusted Engine Builder

just use a flap wheel on a drill on the hed gasket to open it out ... smile

Geordie135 · DTR Member

nice one mate :)

Cameron · Guru

Just remembered about this thread, started getting a similar rattle the other day. Seems to come and go though, did go down the M3 so thinking maybe it was just the pv where the piston had expanded? Saying that it does sound like it's coming from lower down near the clutch.

And Geordie, that cog's for the balancer shaft, had that go on an old engine I had. The whole bearing just collapsed but that was from water in the oil no lubricating it properly, could be a weak part of the engine though? Bit of a job to change the bearing, whole gearbox has to be split. Wondering if that's what the problem is on mine now tbh.

MDK · DTR Legend

had this once and it turned out to be the kick start return spring no working right or set wrong .. while it is running and making the sound move the kicker uop and down see if it changes

Cameron · Guru

I'll check that before I take mine apart, don't think it sounded like that. Reckon mine's got to be something to do with the clutch, already been having weird problems with that. Off to find out how much this is gonna cost me lol.

fused420 · DTR Senior Member

NORFE wrote:
coastie123 wrote:
Look at this on eBay:

SERVICE BARREL NEW REBORE PISTON KIT FULL GASKET SET YAMAHA DT 125 R DTR

http://bit.ly/xwg3sm

His name is Andy, great guy and there's a few on here that's used him for a rebore.. He sorting out my parts for me..
yes i can vouch for andy hes sound quick and cheap !

Ok so i just got my barrel and new piston back from this guy, but he hasn't honed and chamfered after the rebore? Would he normally do this? Or has he made a mistake?

I really don't fancy going to my local engineer with a half finished barrel for him to put right as the bloke is a ****, and its because he is a **** that i sent the barrel off else where instead of going to him in the first place! Plus with the added costs, it probably would of been cheaper to send it to pjme and got quality service and parts. :/

fused420 · DTR Senior Member

He just got back to me with this reply:

"Hi the barrel does not need to be honed as we use a fine cut you normaly only hone on when doing a normal cut. regards andy"

He didn't mention the port edges that haven't been chamfered..

fused420 · DTR Senior Member

Wheres NORFE when you need him! lol

Anyone got an opinion/advice?

FunkeyMunkeyDavid · Guru

can you bang a pic up fella? see how sharp the ports are?

fused420 · DTR Senior Member

They feel pretty sharp

GADGET · Guru

Sorry to say it mate but this should have been sorted ,if you put this in yer bike your gonna have probs with the rings hittin the ports when hot,he's talkin bs,and this could smash the top off yer piston and fcuk the bore or worse the crank coz of the pieces, Even if his so called fine cut thing means no need for honing then the ports need to be champfered,+ the reason for the hone is to bed in the rings so they seal properly,so you will end up wit shiiiiit compression

fused420 · DTR Senior Member

Thanks mate that is what i thought :(

Im going to take it to my local mechanic today and see what he says, and if i have to i will take it to the local engineer. I have a feeling im going to be asking andy for my money back..

Also the supplied piston looks cheap as fook

fused420 · DTR Senior Member

Well i have just got back, mechanic said to speak to an engineer, so i found another one just round the corner from me but they only do bigger stuff now, but he had a look anyway and agreed that it needed fixing, and sent me to another engineer on the other side of town. Again they agreed, but also checked it all over for me and found that the piston was to tight anyway! They are going to sort it out (hone & chamfer) for me for just £10, which i think is pretty good, especially as i also called the **** engineer and he said he would charge me £20! The cheecky ****!

I'm not sure what to do about andy though, whether to ask for a £10 refund to pay to get the job finished, or tell him i want a full refund and send him his parts back, and then order a decent pistion to replace the cheap **** he sent me?

Opinions please..

GADGET · Guru

I would probs just put it down to experience,people like that are greedy for money and I dought he's gonna want to give you any money back,the thing is tho if you've already given the barrel and piston to the new guy then he's gonna hone the barrel to that piston ,if your gonna get a better piston then he needs that first,did you get the box it came in?

NORFE · DTR Trusted Engine Builder

im here....had to come home early from holiday its been a ****ING NITEMARE... 2 kids and a caravan just aint the way to go lol

the 1st barrel he did for me i noticed the same no honing and chanfering, so did inform him, then the 2nd one i just wanted a quick bore so said id do it my self as i wanted it back b4 closing time the same day lol

but i did tel him it needs doing if he doesnt do it

as not every one has the tools to do it, but iv no plenty people who has used him and then just built engines after his work and all have ran and lasted fine

so its a tricky line to walk, personaly i wunt not chamfer the ports or not hone it after boring, as all barrels should be finished to size with a bore honing tool matched to the piston

id just msg him and say uv had to take it elswhere for the finishing toutches and ask him for a partial refund i think thats fair enough

and for the brand of piston he supplys it is aless known brand but iv never had any fail on me over the years on numerous models of bikes smile

fused420 · DTR Senior Member

Thanks Gadget, i just figured that i could just swap my cheap 56.5mm piston with one exactly the same size but a better make, i guess its not as straight forward as that?

Welcome back Norfe, sorry to hear your hols didn't go to plan, sounds like you need to get out to your personal holiday home, the shed! haha

I have messaged him asking for a £10 refund, still waiting for him to get back to me..

Tbf the engineer said the cheaper pistons aint to bad really, its the rings that they said aint up to much.

I get the barrel back monday, i will put a couple of pics up then for comparison.

GADGET · Guru

Yeah nice one ,the fact that he could have killed yer engine is annoying ,you've had a lucky escape there,I've got the piston from eBay in mine coz its all I could afford at th time and mines been fine,what did he charge you for the whole lot (andy) ?

NEV · Guru

Just got off the phone to my bloke who was setting the carb up for me ready for banging on a Dyno, mine was running fine on full power and everything, but every now and then would sort of bog down and sometimes stop, I'd bang it in neutral, and would kick up straight away and off I would go again. I thought it might be fuel/carb problems, but hes just took it out on a run, to see what he thought it might be, and found it to be semi-seizing, as aparently it needed a touch more taken out when it was rebored, as it's too tight for the piston, when it gets hot and expanding. So hes taking it to John Tremlett at Ashburton, to hone it out a tad more, hopefully that will sort it out once and for all.

fused420 · DTR Senior Member

Yeah i think i got off lightly really, if my engine had of gone pop cos of his workmanship i would of gone mad!

Including postage both ways it cost £80 for the service.

NORFE · DTR Trusted Engine Builder

cant find the post i just read mate about the ring not fitting ...both the rings are different there difrent shapes u need to have the key stone shape one at the top !

so swap em round

all in the manual lol biggrin